E30 differential differences. 0 I understand that the diff in the 3.

E30 differential differences E30 6-cylinder diff will physically fit; gear ratios are what you need to consider. The tools used were: 1/2 inch drive ratchet and deep 30mm socket, short single hex 19mm socket, crack bar, 1/2 in drive 8mm allen bit socket, 3 large extension bars, 2 19mm combi spanners, 2 17mm combi spanners, large flat headed screwdriver, trolley jack and axle stands. 73 diff is doing 153 at factory redline. com. Most USA models from 1982 to May 22, 2020 · The diff I've got my E30 is a Z3 Torsen Diff so non M, and has the smaller ring? Than a 188 E30 one so question is what speed sensor do I need and that'll work? Apr 26, 2009 · Z3 diff is 3. 64 gear ratio differential Apr 13, 2014 · What I can tell you having sourced a new diff and gears for my E30 is that there are 3 size casings - small, medium and large. Jan 21, 2016 · Driveshafts are the same (only difference is the abs ring). E46 is a large case diff and is different to all the other diffs in relation to how it bolts Step 1: Enter Final gear ratio (differential)Step 2: Enter Tire Size All new bearings, seals, clutch discs, dog eared plates and necessary bolts for a full refresh on your E30 325 differential. You'll se which parts are interchangeable, what Dec 10, 2009 · Double check, but I seem to recall the E30 diff won't work on the E34. Are these axles really 'beefier'? Then I would install the Z3 M trailing arms too. Ask how you can make a difference! May 30, 2024 · Damage would only occur if you were to run different ratios in front and rear. I had an e30 m3 for 10 years and loved the low gearing. By adding a second mounting point you are effectively spreading the load your stock diff mount and bushing E30 and E36 are the remaining BMW series worth giving a little attention to them. This contrasts to the normal differential fitted that is known as an Open Diff. Just swap the output flanges and the rear The 325i diff is wider than the 318i diff, and pretty sure the ratio's are different. medium case e34, for my friend Andrew, who has also has a boosted e32 735i 5-spd: Note: medium case axle hubs may come in either small or large diameters. Identify 168mm, 188mm, and 210mm differentials with examples of specific models like E30, E36, E34, and M5. 95A Track (Green): Significantly stiffer and str Differential The Z3 uses the same differential case as the E30, and is therefore a direct swap. I am trying to figure out if my parts car 325i has one. Mar 25, 2015 · Upgrade options (for e30 BMW’s only and possibly other bmw diffs): An easy upgrade for e30 BMW diffs is to add a 3rd clutch pack for more lock up (It is said to take it from 25% lock to ~40%) This is done by buying a 3rd friction plate (#9) and a dog ear plate (number 8 in diagram). So, what is the main difference between E30 and E36? The core difference is E30 edition has a robust construction design to tolerate insane abuse during the rally, while the E36 edition is more luxurious with weaker components for comfort purposes. Our professionals are here to help make sure you find the answers you need to your questions and our community is here to help other brainstorm Dec 5, 2012 · The manual 530 and manual 535s share a bolt pattern with all 540 and m5 cars (94mm BC, M10 bolts) although they use different size diffs. Apr 15, 2007 · What differential came on the 1990 325i? I'm looking for more power and better gas mileage are these two thing mutually exclusive? If I can’t have both, which differential will give me the best of both worlds? What is everyone running? Nov 19, 2015 · Any U. All e24 M series use a 3. 8 or MZ3. Dec 14, 2006 · Does anyone know the differences between a type 188 and 188k differential; I bought an E39 323 diff (188k) off ebay, cheaply, to try and fit the 3. 0 is just a 325i diff. This can be added by simply removing a metal spacer within the assembly that is 4mm thick exact thickness of a Sep 16, 2008 · I am no longer running the stock diff, so i no longer have a speed sensor but still need a way to retain the stock speedo and odo. the 2002 diff? Is the stock configuration the same as the new one? The photo appears to show some deflection but it may just be the angle of the camera shot. Zf transmission btw :) Thanks for the input guys- just trying to work out the vibrations. There are several differential types. Dec 2, 2022 · A table of BMW gear ratio and final drive for various models including E30 E36 E46 E82 E85 E86 E88 E90 E92 and more. BMW Limited slip Differentials BMW chose to use LSD friction type (clutch type) produced by ZF. I took some detailed dimensions noting the differences between a large e32 diff vs. so I really need someone else with all the answers to chime in. The diff ratio will be quite abit lower than an E30 diff though but depending on the size of the casings, you can use the LSD unit out of the E36 diff with your own final drive and casing The sole exception is the E30 M3, which uses a six-cylinder-type differential, thus providing a source of 4. The main differences between the 325i and the 325e are in the engine. will it fit as i know there is large and small case diff on e30 and obviously dont want to waste the guys time if it wont fit. All BMW models until E36, E34, E32 could be produced with the option “sperrdifferential”. 91). 180 mph maximum. I just modified my E30 LSD by adding the E36 dual ear cover and clearance'd the cover on the inside and machined a . However there is enough length in the splines to take account of this. 7 liters versus the 325i's 2. I have rebuilt. There is a set pressure on these that keeps them together unless the difference in the traction of the two wheels is great enough to overcome the friction plates. Anyone know what the difference is, if any? Nov 5, 2019 · All E10, E21, E30, and E36 4-cylinder models (except M3) fit with small-case differentials with a ring gear size of 168mm. Its always a good idea to use the best tools you can get your hands on and the job will go a whole lot easier and more E30 E36 Ti/Z3 Notes: E36 E30 Diff swap to Ti Output shafts from E30 must be from a car with ABS Use E30 output shafts and axles with a medium case diff E30 LSD is clutch-type, Z3M is Torsen E24/28 Diffs require Diff cover swaps Most input shafts are the same (4 bolts), M cars may have 6 bolts E30 5 lug swap Use Ti trailing arms Am I just wholesale unable to use a getrag 260 from a non-AWD E30, or is it just a matter of retrofitting and possibly fabrication that are the deterrents? HOW different is "different" when looking at the end of the iX transmission where it meets the transfer case? Am I looking in the wrong places for parts? The diff with the taller flanges is currently fitted to the car, it fits fine but I can't help wondering what effect this will have on the drive shafts. Sep 29, 2007 · The half shafts are different on the diff end, I think the e30 is scalloped all the way round and the Z3 is scalloped between the bolt holes (Or other way around) but they bolted up with no probs. A 188 is the correct type for a 325i, and swapping a complete one (including output shafts) is a straight swap, apart from a small adjustment to the sliding part of the prop. I converted my open-> right to a torsion on the left. Case Size The E30 was fitted with two sizes of differential. E30 Small Case vs Medium Case diff for comparison if you guys ever wondered 🤙🏼 4. Apr 7, 2012 · I am trying to track down some info about fitting a large 210mm diff into my e30. Differentials receive torque from the rotation of the engine through the Limited Slip Differentials are referred to as a Slipper or as an LSD. 65 to 4. From what i've heard, you'll need a medium-case diff as the small-case ones can't take the extra torque supplied by an S50 3. Neither seem to be under much stress, perhaps if you spend you driving time sideways and maxing your 0–60mph times it would be a different story. Many of them can be grabbed from E28, E24, E32. Lifetime warranty Hardness80A Street (Black): Slightly stiffer and stronger than OEM rubber. You could have 1,000 hp but if you’re out of gear, you’re out of gear. but it is a plug and play item if you have the proper e30 output stubs installed and proper speed sensor in to match the e30 (e30's have 2 styles) Jan 15, 2017 · I came to this forum in the hopes you could tell me if I can put any E46 diff in my car? I'm asking this because my current diff is broken, and I'm finding it really hard to find a good 3,07 ratio diff here in holland. On these models BMW was pretty lame and used a smaller spline. 325i The primary differences between the 325e and the 325i are in the engine and drivetrain. its also a 4. 45 LSD is also very very hard to find (fitted to 320iS) SAE30 E30 Sep 12, 2021 · I am looking for differential specs and torque values for E30 small case. Nov 26, 2011 · e36-7 has funny output stubs somtimes, also slightly different rear backing plate cover to fit small speedo spider. Available at DriftShop. 36 (2002 Turbo), 3. The BMW Z1 roadster was also based on the E30 platform. . Found this while doing so BMW research. An open differential is oftentimes cheaper Kaaz Limited Slip Differential for BMW E30, activate maximum grip, traction and control. If the bearing is on the rear section (as in E30 M3), the bearing is tensioned toward the diff. 73 ratio. Does anyone know if I can use the automatic ones (4. An absolute must for V8 swaps. They are different part numbers as well. Accordingly, ring and pinion gears can be exchanged freely between all these cars. Like when one wheel is totally on ice and the other has traction, or when turning. Oct 10, 2007 · Well the title says it all. available ratios from 2. Differential Main article: Differentials One of the most curious components in the drivetrain, the Differential is a massive lump of metal bolted to the rear subframe. I keep hearing different things from different people. Explore the technical benefits in cooling, strength, and long-term drivetrain reliability. The first was a completely welded unit just like the transfer case. Following the launch of the E36 3 Series in 1990, the E30 began to be phased out. The same as the e23. May 31, 2002 · I believe that some E30 325i models with automatics (possibly convertibles) came with a 4. ? Any help would be greatly The rear end is similar to the E30, but the differential is a specific viscous limited slip differential with a 3. In addition, differentials from the E28 5 Series BMWs (1982-88) will also interchange with the E30 six-cylinder 3 Series cars, and this becomes key to modifying the early eta engine E30s. The “e” denoted “efficiency” and was referred to as eta, the Greek character, and was the first time BMW designed Mar 17, 2015 · This differential bushing will fit all BMW E30 models, E36 318ti, and Z3. Jun 11, 2018 · This is for a 240sx. Dec 12, 2017 · You can either swap the reluctor from an e36 diff into the single ear case/carrier, or the second time around, I cut the e30 reluctor ears to e36 length and it worked fine (they have matching pulses per rev). Thanks for watching, bmw have 3 types of diff, small / medium / large and they only differ across the range with regards to the back plate, the 6 pot e30s all came with mediums - so if you get any medium case diff it'll fit. 2. 45 was the diff from the e36's, and the 3. Large = 210mm Medium = 188mm Small = 168mm The medium case diffs were used in for example the 6 cyl E30 cars. 45 going into my Rotary Powered e30 Front/too view of the diffs side by side. 5), but drastically less horsepower (121 vs 167). Jun 29, 2021 · In this video I talk about the differences between the 3 series and the 5 series of the 80s/90s. also, do 2002's come with the medium case differential? IRS? if so the rear cover from the 2002 will fit directly onto the e30 diff. Will the old one transplant ok? FinalD E30 Zone Camper Posts: 1098 Joined: Wed Apr 25, 2012 10:00 pm Location: Bristol Fri Jul 05, 2013 7:18 pm Jun 5, 2008 · One more time: all 6 cyl E30's plus E30M3 have the "medium case" diff all 4 cyl E30's except E30M3 have the small case diff The ix diff is LSD, but it's a viscous type vs the clutch type found in 99% of other BMW LSDiffs. Dec 22, 2021 · Article by: M. Mar 25, 2015 · Using my diff as example there are two small disks or friction plates locking the two wheels together. 300" spacer for the E30 speed sensor to fit without hitting the ring. Obviously they are designed to have some compliance in length for suspension movement but how much? Sep 18, 2023 · Why a LATE model E36 328i or M3 driveshaft? Early driveshafts have a 3 bolt mounting point to the diff and as such won’t fit with the standard E30 diff flange. Mar 17, 2012 · What are the different ratios for the E30 LSD diff. Pelican Technical Article: BMW E30 3 Series SpecificationPelican Technical Article: We would like to show you a description here but the site won’t allow us. I'm convinced someone on here knows the answer to this question! with kind regards, Jeroen. Engine and gearbox are the same. Jan 21, 2004 · well, hang on here, the 3. The difference between small case and large case diff is taken up by the diff output flange not the driveshaft. is fairly close to its limits when coupled to a 2. 10 for $200 at a local yard. Nov 16, 2021 · The main difference between these axles, and axles from the next step up (like E46 330 or 135i), is the outer axle stub. Steering The steering rack is one of the standard upgrades for the E30, thanks to its faster turn rate. I was reading through the Pelican Parts article about the E30 differential swap. 10, and 4. Jan 24, 2016 · Article by: Don Gale Article applies to: all e32 and e34 models. I was able to pick up an open 4. The 3. 07 to one ratio. 7 liters vs. 46 would be the one from the e30's. You still need the diff to convert it; see the big casing. 2 diff has its own housing and different driveshafts. An E30 on stock 24” tall tires in Getrag 260 5th gear (0. In this article I will go over the steps involved in swapping out differentials in the BMW E30 3 Series from 1984-91. If you are going to use e34 or e30 diff on e28, you need to make sure the new diff is the same type (188 or 210) as your current. 325i has the m20b25 while the 325e has the m20b27 the b refers to the engine displacement so the i is a 2. I removed the 4. Will the old one transplant ok? FinalD E30 Zone Camper Posts: 1098 Joined: Wed Apr 25, 2012 10:00 pm Location: Bristol Fri Jul 05, 2013 7:18 pm Jun 22, 2010 · Remember reading somewhere that the Z3 diff mount was superior to the OEM E30 mount, but can't seem to find it now. The K swap e30 is fun but it begs for a different differential. build/product/188mm-bmw-differential-rebuild/Tod By looking at them in isolation and not knowing which car they have come from, how do you tell the difference between Small and Medium case diffs???? My original thought was that only Small and Medium case diffs were available on the E30s and that Medium case diffs are LSDs and Small case diffs are open diffs. The smaller case was used on 4 cylinder and 320i cars, and has a crown wheel of 168mm Nov 6, 2019 · BMW E30 differentials are essentially the gearing module that connects the input driveshaft to each of the rear wheels. 3. Cheaper, faster and easier to go that route. The z3 differential is plug and play after flanges and cover are swapped over from a medium case e30 diff. This upgrade is ideal for improving handling, power delivery, and drivetrain stability, especially on aging vehicles where the original bushings may have deteriorated. Perhaps I needed ones from a different year or something:dunno Oh, well- I ended up Dec 3, 2013 · According to the God of all things diff. Dec 17, 2011 · That's a good question. You've not provided any pics, so we're all just shooting in the dark. Jump to: Fluid for manual transmission Fluid for automatic transmission Fluid for Jul 5, 2010 · An old thread, I know, but there is a slight difference in the side covers on these diffs from open to LSD. Although both models have engines from the same M20 family, the 325e had more displacement (2. Jun 15, 2017 · What is your ideal differential ratio for the e30 06-15-2017, 06:42 PM Discuss the different ratios, just curious to see what everyone prefers 5 Voters Dec 5, 2012 · If you can twist the differential out-put flanges in the opposite direction with your hands then you've got a very worn differential. So if you wanted to swap a diff from a 530 manual into a 525 (or vice versa) the output flanges from the original diff need to go in the diff that is being swapped into the car. You get to choose gear ratio according to your need. 79). May 23, 2017 · I could feel the ticks watching me. 64, 3. BMW shop manual only shows procedure for replacing complete diff but nothing about swapping gear sets, setting preload or adjusting the backlash. Let me know please :) much appreciated May 10, 2015 · Why would anyone want to replace the unbreakable 260 Getrag gearbox with the 240? Rear prop section lengths differ slightly depending on what diff it has - small case for 316, 316i, 318i and 320i and medium case for everything else. Thanks much for your time and consideration. Oswald Models: All BMWs specified in the table below. Cost effective, tough, direct fit plate LSD's from Kaaz. Are you talking about the stock 320I diff or a 323? BTW is thete a difference between the capacity a 320i vs a 323 diff can handle? Also, what's the specs of your car? Differentialtabelle - BMW E30 Die mit einem "X" angegebenen Differentiale wurden über den gesamten Produktionszeitraum des jeweiligen Modells verbaut. I want to ditch the e30 drive shaft and flex disc adapter from revshift (getting lots of vibration). Most 2002s came with a 4-speed transmission and a 3. Conventional limited slip differentials like the E30's contain clutches that wear out over time (just like the Oct 23, 2006 · The only caveat is that an E30 uses different half-shafts, and thus the output flanges on the medium case diffs are different E30 vs E28. the 318 ti is the compact, and thier rear suspension is taken from the e30's, so that, i think is where the differences stem from. Only the Compact diff bolts straight into the E30 rear beam, but it's the Type 168 small case unit that can just about cope with the 318Ti and it's getting hard to find one now that doesn't whine. Sep 24, 2009 · The whole diff will fit an E30 as the are the same casings. This will replace the notoriously unreliable E46 unit, i wondered what the difference was from the Evo to the Standard unit? and incase anyone has an EVo Diff, let me know! Unlock the full potential of your BMW with our high-performance Type 188mm Limited Slip Differential, specifically designed for the E30, E36, and Z3 models. Nov 24, 2007 · I did a little of searching, (probably not enough) but I wanted to find out which E30's had which differential? I know some had the LSD, some had 3. Here I will explain what is the difference between open differential and LSD May 24, 2017 · A place to discuss the AWD E30This is where it gets rather exciting :D between the two diffs I was disassembling they had two different designs for the viscous coupling. Fits 168mm small case limited slip LSD and open diff E30 SECONDARY DIFF MOUNT (DUAL MOUNT CONVERSION) If your E30 is making serious power, your differential is seeing serious loads. 91 to one ratio, 180 mph because of higher RPM. The size of the case is dictated by the diameter of the ring gear. It receives power from the propshaft and splits it to both wheels. Iirc, the E30 driveshafts don't bolt to the flanges, so you have to fit E30 small case output flanges. Feb 12, 2015 · Got an E30 overhaul brewing and Chris Foose is no where in sight. E30’s you can get a healthy diff for around 350. Along the way we discovered some interesting differences Aug 18, 2004 · The differential's "dogtag" is located on the right side by the speedometer pulse sender on a large diff, and on the top left by the diff mount on a small differential from the factory. (does the 02's diff mount ride in the cover like e30s?) and the output flanges are a direct swap too. Apr 14, 2025 · Learn why BMW E30 owners are replacing stock differential covers with billet aluminum versions. Jun 3, 2013 · Hi guys, I am about to pull the trigger on a z3 lsd to put in the s50 swapped e30. Professional installation by a shop experienced in rebuilding differentials is strongly Oct 27, 2011 · Hey guys, Im getting ready for my S50 swap from 1995 m3 3. At Bimmerforums, you will find technical how-to information maintenance specifics audio advice wheel and tire combinations and model specific details not found anywhere else. Perfect for BMW enthusiasts and mechanics. This bespoke LSD solution is perfect for any driving discipline, from circuit racing and hill climbing to daily street driving, providing unparalleled versatility and adjustability. Different mounting points. You'll pay a premium sourcing an iX 3. Nov 4, 2015 · Hi, I've been told to look for an E36 EVO Differential to be used in my E46. You may be able to swap your rear cover onto it, but I'm not sure. The LSD is different, as it is a single ear E30-based setup. The rear cover comes off easily, but be prepared, you may need a new gasket, the drive flanges also come off easily, but clean up around them first so you don't drop dirt in your nice new diff. 5 while the e is a 2. Dec 31, 2024 · One small problem with using an E30 diff in an E28, you need to change the rear cover and the drive flanges. Over the years, they were installed and other types as Visco LSD, locking type (EH Differential), Torsen… but this was rare. Note: for the purposes of this page, "Vintage" refers to all BMW cars built up to and including the E30 3-series. What about autocross, fun curvy country roads or just the thrill of getting to your desired speed very quickly? Gas mileage (for me who cares), if you are worried about that get a hybrid, an e Download Downloaded 509 times© 2025 E30 Goodies - WordPress Theme by Kadence Themes Nov 19, 2016 · The diffs are very different, but the internals are the same so you can fit a CWP (or entire diff unit) into the e30 diff. Or, is there any other differential that is suitable for this swap? #E30lsd #E36lsd #racingdiffsVideo shows all differences and similarities between E30 and E36 small case LSD. We sell complete, assembled Limited Slip Differentials for BMW E30, E36, E46 Each option includes: RacingDiffs ALL Solutions LSD unit, Bearing and oil seal set, Sandblasted and painted housing, a laser engraved rear cover. You can find any E36 sedan or coupe LSD and use that, or you can swap the internals from another 188mm case LSD. 15 crown wheel and pinion to my 2. One of the big differences between the e30 325i and 325e/325 models is the rear differential. 73 "limited slip" differential ("LSD"), where the 325e/325 cars ship with an "open" differential, with a I have rebuilt. A diff for my car. Feb 12, 2006 · The large case differential (used on Euro E28 535i, for example) has the ring gear diameter of 210mm. We will walk you through pros, cons, and differences between each type of differential found in BMWs and explain gear ratios to help you choose the best differential for your BMW and specific driving needs. Dec 8, 2003 · I installed a 3. It has a crown wheel diameter of 188mm. They are the exact same casting but the open diff seems to have around 5 to 10 mm machined from the inside part that the differential rides in. : Differential LSD swap Hope this helps. Feb 28, 2009 · Re: How to: Differential Swap by joecrotch » Mon Mar 23, 2009 11:54 am not really interested in doing it just wondering if it is done or can be? sorry shoulda mentioned that The Free A Yoshi Foundation. 15 M3's are very hard to find, most M3's came with 3. Nov 22, 2014 · I swapped the shaft sections between the auto and manual, which gave me two different lengths, both shorter than the standard e30 manual driveshaft. A healthy stock e21/e30/e36 small case LSD should take between 25-30 ft/lbs before slipping. Does this imply that an E36 differential would fit an E30? This is more of a query of how the article was written. A differential transfers power from the driveshaft to the wheels, while allowing the wheels to spin at different rates around corners. Some of these differentials are too high for highway speeds. It said that the instructions apply to the 1995-1999 318ti as well. The oil seal mount ring (that part on each side of the diff, behind the output flanges) has 8 bolts. The Powerflex Rear Diff Bushing for BMW Z3, E30 3 Series, and 318Ti is a high-performance replacement for the factory rubber bushings in the rear differential. A little less miles if pushing on. Today we will talk about 3 types of BMW differentials What is the difference and which differential does my car have? The 188 or 188mm differential is found on chassis like E28, E30, E32, E34, E36, in turn, 188k on E39, E46, E53, and the more modern models like E86, E90, E92, F2x, F3x mount the 188L How do I know which differential is in my car and which 188 should I buy? If you have it Upgrading your BMW’s differential from the factory options provides unique benefits for different driving styles. I have one here that looks like a 3:40 Feb 1, 2012 · Lessons learned: Any time you use an E36 diff cover on an E30/Z3 differential you will need the E36 speedometer reluctor ring ($6) + speed sensor (10+ days from Germany), and we would pre-order matching body color paint 1-2 weeks in advance, as well as the swaybar mounts and any seals that could be potentially bad. Jan 3, 2012 · I just spent the better part of 2 days replacing a broken subframe in a 318is this looks real familiar. The small case output flange is longer. Differences in cases and carriers seen here: Rebuild your rear BMW differential with our repair kit - bearings seals spacer and more included. BMW Differentials for E30 325, M3All differentials are built to order and we are currently running at least 4-6 weeks out from order date to ship date. I have seen the E34 diffs appear to use the same case though but with a different rear cover, so may look in to that. Oct 4, 2008 · Right, not an E30 but an E30 rear-end, my car: But unfortunately for my small case diff, I've stuck this in it: I'd like to upgrade to a medium case diff, ideally from a Z3 2. Odometer 276000km. Jan 28, 2011 · Hey guys do any of you out there like to accelerate quickly and actually like to shift gears? I have 3. LSDs were fitted as standard to the 325i Sport and M3. 3L 4-cylinder based on the M10 engine. And yes tjts1, I agree with your comment about how explaining this to some people is like explaining sex to a virgin. The BMW E30 and the BMW E34. Revshift bushing lube included. 10 ratio) with manual trans, I think the manual ones for 325ix are (3. Dec 8, 2016 · Want to get some more cornering acceleration out of your BMW? Do you want to add a limited slip differential to your car? In both cases, the differential must be replaced. Now the ratio: Most Euro Sharks are equipt with a 3. 10 differential. however the i has a higher redline and about 168 horsepower from the factory while the e has about 127? (not sure on exact number i just know it’s in the 120s). 23 slipper last weekend from an e34 for this purpose. I picked up a 3. The oil seal mount ring has 6 bolts. Although both models have engines from the same M20 family, the 325e has more displacement than the 325i (2. 73 or 4. Will a limited slip differential from an e36 fit on an e30 without any problems or too much custom fab? Or is it entirely different and incompatible? Just wondering. Before 1983 the e12 side loader was in most e24. The M3 has a modified unibody, flared fenders in front and back, different front and rear valances and spoilers, etc. 93 bits with bits from other ratios, in that the crown wheel is a different thickness from other ratios, and the bit it bolts to is similarly changed to compensate. does anyone have any details on how the bmw differential trigger wheels work? what changes between gear ratios, tooth width, number of teeth? what type of sensor is the stock speed sensor, vr? hall? Oct 18, 2013 · Waste of time. They were not standard on the 318iS, but were on option available to all E30 models. 10 lsd. 10 limited slip diffs for the 325i. Great choice as an upgraded stock replacement (OEM+). 27 (very rare). This is especially convenient for the lower ratios Z3 diffs can offer; the 3. Nov 6, 2019 · BMW E30 differentials are essentially the gearing module that connects the input driveshaft to each of the rear wheels. 73 LSD from an e30 325is in my 318ti yesterday. 73 is a nice ratio, but it's more suited for the original M20. are 3. Has anybody got any pictures or Intel on the differences between the diffs in a E36 EVO3. Dec 5, 2004 · The e24 M series uses a larger differential in size. A great upgrade for drivers looking for added acceleration and grip for the E30 325i and E30 M3! A differential upgrade/rebuild for your E30 delivers performance far above the original factory spec. S. 5 engine - much more so than if a smaller engine (240) gearbox is used instead of the correct for a 325i 260 gearbox. 73 and I am going to switch to a 4. Hiervon ausgenommen sind: Die spezifischen Länderausführungen werden nicht berücksichtigt. 73 "limited slip" differential ("LSD"), where the 325e/325 cars ship with an "open" differential, with a Jan 16, 2016 · My current questions revolve around limited slip or open, can any e30 differential fit, transition between medium and small case. The front end is a completely different kettle of fish; it employs a differential inside the engine sump before sending power through the drive shafts to the hubs. 7. No increase in NVH. If you're interested in having me rebuild your differential, click here to find out how!https://garageaholic. ***NOTE: Due to variances in the manufacturing of bearings, you may need to use different shims for the pinion and carrier bearing caps as the tolerances are not always exact. 1. Keep in mind that this tech article covers all 3 series models, including the BMW E36 318ti from 1995-99 The main differences between the 325i and the 325e are in the engine. There are many different options for picking the right differential. The second had a big retaining clip holding the one end in!! Which means it can be rebuild without cutting it open on the lathe!! Cool :D Confirmed that the Feb 17, 2006 · Joined: Feb 17, 2006 Posts: 2,833 Likes Received: 0 easy peeps ive been offered a diff off a 320i e30 for my e30 325i. 0, and im wondering if the m3 differential just bolts on into 1988 325is e30? or do i have to do some modification? [ i got s50 tranny driveshaft differential ] and another question does e36 m3 differential is exactly the same as non-lsd regular 325i size? [ my cover plate broke, and im wondering if i can just buy any e36 differential The E30 325iX model was the first BMW to have all-wheel drive. will be about 10% higher for the same speed in top. 45, 3. There are no differences between driveshafts, and it's only after 12 posts that we find out you're not using a standard E30 diff. The medium case differential (used on US E28, 6 cylinders E30, etc) has the ring gear diameter of 188 mm. e28 shares same diff case with e34 and e30. The primary difference being the ability of both wheels to spin in a slip event. The first BMW M3 model was built on the E30 platform and was powered by the high-revving BMW S14 four-cylinder petrol engine. May 6, 2016 · A 168 diff. It is also worth more than a common m3 diff. The larger is known as a medium case (Type 188), and was used on 325 models. 25. I have everything but the diffs. 81) with a 3. Below is a table of differential gear ratios offered in various BMW models: Nov 1, 2018 · The M3 is a completely different car than the rest of the E30’s, sharing very few common parts. 2 M3 and the diff in a E36 M3 3. November 2008. The normal after 1982, e24 shares the differential case with a e30-6, e28, and z3. Jun 25, 2023 · The e36 diff has different mounts on the case itself which is why I was wondering if the internals would swap in to an e30 case. I have noticed that they are available from the M5 and most of the V8 5 and 7 series BMWs. First off, the e30 axles I have most definitely do not fit the ti- seems like the wheel speed sensor portion of the CV is substantially larger and doesn't clear the suspension on the ti. BMW Transmission & Differential Oil This page covers fluid information and recommendations for BMW manual and automatic transmissions, rear differentials, and front differentials on xDrive models. Yes I Jul 22, 2024 · Learn how to determine the differential size in BMWs up to 1999 by counting the bolts on the side caps. Gear ratios commonly available in the U. The '84 got the tallest diff from the factory and none were LSD (2. Whereas the 3. 10 which im told will make it a bit short? but as its being welded i cant see it being Dec 10, 2018 · BMW E30 Driveshaft Differences I’m currently in the process of swapping an M20B25 into my Series 2 E30, that previously had an M40 in it. Feb 5, 2020 · There's about a 10% difference between the speed of an auto and a manual E30 for a given engine revs, when in top gear and with the same diff. What is the difference of the output flange geometry front to back on the e30 diff vs. Feb 13, 2012 · I have a hot tank cleaned media blasted early small case 1985 unit I could measure up against a 188mm 2003 z3 case if wanted to know the compatibility between earliest 168mm e30 diff and latest e30 188mm compatible units from z3. 64 and it will likely need to be rebuilt when/if you do find one. Will that bolt up directly to a 2002 z3 diff? That would be swell. 0 I understand that the diff in the 3. Diffsonline has 20 years of expertise in BMW differential upgrades and rebuilding. Visit RacingDiffs for high-quality LSD conversion kits. I'd just like to know what's involved going from a small to a medium case diff - how interchangable are they? Will I need to swap the rear half of prop and the 2 halfshafts etc etc. In terms of fitment to the subframe and body, the diff case has the same bolt pattern, so that they both bolt up to the subframe. Sämtliche Differentiale gab es mit folgenden Ausnahmen mit und ohne 25% Sperre. I tried matching up parts numbers to verify fitment, when I came across the difference in case Feb 28, 2016 · Doing a swap on my Bmw e30 325ix. Note that the torsion is around 500$ for that model. Most 325i cars ship with a 3. Some differential are “open” and some are “limited slip” or “posi-traction”. You can swap internals, but rather than do that, just sell the one out of the E30 and get one for an E34/E32 735. 10 diff is the perfec This video shows you how to determine which RacingDiffs Progressive LSD conversion set to get for your BMW differential. 45. ratio, so if you keep the same diff, your engine revs. Two cars that are commonly mist Mar 20, 2020 · From an interest point of view, I have temperature sensors in the diff and gearbox, in normal everyday driving it takes ages 20+ miles before they even register heat. Z3 M differentials bolt into the E30, just need to use E30 differential flanges for the halfshafts to work, right? Or I could use Z3 M differential, flanges, and halfshafts. The covers and stub axles are different for some of the cars (E30, E36) but E24 covers and stubs (same as E23, E28) are swappable directly on to a donor diff case from any of the above. The original has a different speed sensor plug to the rebuilt one. 10? I am aware of the tags and the "S" on the bottom, but most of the cars I come across have the tag missing, or it is rusted and hard to tell? Did all the auto trans cars have an LSD? What were the factory differential options for the E30 WATCH THIS 10-MIN quick guide before choosing and buying your BMW differential (E28, E30, E34, E36, E31, E32) Video covers briefly diff case differences, modifications needed for usage and Apr 8, 2011 · The answer is yes and no, Lol! It's not a straight swap, because the E36 diff uses a different diameter reluctor ring and a dual ear cover on the rear. 5) but drastically less horsepower. i think it does (through research) Bimmerforums is the preferred online BMW Forum and community for BMW owners. A 4. The stock e30 shaft is about 57 inches (+/- about 1 inch). 93 328 sport LSD (188), but most people seem to think they won't fit, any particular reason? 325e vs. An open differential is oftentimes cheaper BMW E30 Differential Ratio Guide If you're swapping the drive train in your RWD BMW you will likely want to swap out the rear differential to one with a ratio that suits the transmission and your driving characteristics. 27 small case open differential from the E30 and with both units on the bench I took the opportunity to discuss E30 differentials and their differences, including how to identify How To Remove & Install a BMW E30 Differential | SIKKY Manufacturing SIKKY 15. That's where the E30 dual mount conversion comes in. It utilized the S14 engine, a 2. Do the E30's have two different diff case sizes? The reason for asking is, I'm having some trouble getting my head round the diff swap needed on my M50 fit. related, otherwise known as 'Gareth', there's a complication when mixing 2. I know the mounting points on E30 small case diff are different from E21, but can you swap the internals from E30 diff into E21 diff housing saving the output flanges. Many of these differentials (bolded) are featured in E30’s. 15 is a particularly popular unit. 1K subscribers Subscribe Oct 18, 2009 · Here is the question. I had read the diff is a direct swap aside from the axles. Some are too low for fast acceleration. As I Mar 29, 2009 · Visually, is there any difference in the two diffs open vs LSD. 91, 4. May 7, 2017 · Hi Cutters, After some advice plz. 15 medium-case like the M3, but has a slightly different diff cover (finned). I have a spare 95 m3 drive shaft here. Dec 16, 2014 · Hey guys! Thanks for reading. 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