E30M54 0 Report post Posted September 28, 2022 Hi All, I am building a E30/M54 mated to a G220, there's a lot of lash in the drivetrain, about 20 degrees. The lash coupled with the RHD flywheel chatter makes for nasty goings on when pulling away and general driving. I am wondering if a rebuild of the tranny will eliminate this lash, if so... does anyone sell a rebuild kit? Lastly, if a rebuild kit does not exist, where could I get a list of parts to replace to do my own? Sorry lots of questions, I know engines but am lost with the tranny. TIA Francis Quote Share this post Link to post Share on other sites
Blackie 510 Report post Posted September 28, 2022 I had a car with a RHD flywheel and it was difficult to get off the line too. I also noticed there is a lot of lash on my E46 with M54 and auto trans, so maybe normal? Quote Share this post Link to post Share on other sites
Eagle 1662 Report post Posted September 28, 2022 Have you isolated it to gearbox?. Diff, driveshaft and CV axles or combination of them all are the usual suspects. Quote Share this post Link to post Share on other sites
E30M54 0 Report post Posted September 29, 2022 16 hours ago, Eagle said: Have you isolated it to gearbox?. Diff, driveshaft and CV axles or combination of them all are the usual suspects. This saturday I am bringing it to the shop, going to measure where the lash is actually coming from. I know am sure its not the drive shafts, almost certain not the diff... I've got two things to sort out, where the lash is from and if my diff from a Z3 is an LSD. If it is, I am thinking the stage 3 or 4 from Racing Diffs would be a go but thats for a different post. I've got quite a few things I am trying to solve on my E30. Quote Share this post Link to post Share on other sites
thorburn 121 Report post Posted September 30, 2022 I'd suggest talking to the experts before splashing out with racing diffs. Their after sales support is useless. Their guides are equally as bad. You might get lucky and have it fit without modification. Quote Share this post Link to post Share on other sites
polley 916 Report post Posted September 30, 2022 Am I missing something but is there a difference between lhd and rhd flywheels you guys are talking about? Quote Share this post Link to post Share on other sites
Neil McCauley 394 Report post Posted September 30, 2022 24 minutes ago, polley said: Am I missing something but is there a difference between lhd and rhd flywheels you guys are talking about? https://racehead.com.au/ Quote Share this post Link to post Share on other sites
polley 916 Report post Posted September 30, 2022 17 minutes ago, Neil McCauley said: https://racehead.com.au/ Makes more sense now 😂 1 Quote Share this post Link to post Share on other sites
E30M54 0 Report post Posted October 1, 2022 (edited) Update... measured the lash, its about ~3-4 degrees, not sure if it's worth bothering with it. Popped the diff cover off, got a torsen LSD 😃 but it's only 25% lock so to do proper skids I'll need to upgrade at some point. Does anyone know how to make these 100% lock? Edited October 1, 2022 by E30M54 Quote Share this post Link to post Share on other sites
thorburn 121 Report post Posted October 1, 2022 If you want a locked diff, I'm sure you know the answer to that. If you want a clutch type lsd mfactory, drexler, there's a bmw motorsport lsd on fb currently as well. It depends how much it is worth to you Quote Share this post Link to post Share on other sites
E30M54 0 Report post Posted October 2, 2022 (edited) 18 hours ago, thorburn said: If you want a locked diff, I'm sure you know the answer to that. If you want a clutch type lsd mfactory, drexler, there's a bmw motorsport lsd on fb currently as well. It depends how much it is worth to you To be honest... I am 56 so skids arent that big a deal building this car is one of those bucket list things. That said, every now and then particularly in the wet I like to let the rear hang out. Wavetrack make an really good (so I've heard) helical LSD I think better than the clutch type particularly for the occasional track day. I'll leave it at this for now, the lash is still annoying but its doesnt sounds like there's a easy fix without pulling the diff and adjusting the pinion/ring gear. Edited October 2, 2022 by E30M54 Quote Share this post Link to post Share on other sites
polley 916 Report post Posted October 2, 2022 2 hours ago, E30M54 said: To be honest... I am 56 so skids arent that big a deal building this car is one of those bucket list things. That said, every now and then particularly in the wet I like to let the rear hang out. Wavetrack make an really good (so I've heard) helical LSD I think better than the clutch type particularly for the occasional track day. I'll leave it at this for now, the lash is still annoying but its doesnt sounds like there's a easy fix without pulling the diff and adjusting the pinion/ring gear. Helical not much help if you get a wheel in the air is the only thing. Quote Share this post Link to post Share on other sites
E30M54 0 Report post Posted November 1, 2022 On 10/3/2022 at 2:24 AM, polley said: Helical not much help if you get a wheel in the air is the only thing. Apparently the Wavetrak have this wave shaped (get the name) bushing that will mimic traction on the side thats spinning so it locks. I thought it was interesting watch, I am not getting one now... maybe sometime in the future, I'll stick to my Z3 torsen diff. Quote Share this post Link to post Share on other sites
