https://www.r3vlimited.com/board/ en Thu, 16 Apr 2026 17:13:54 GMT vBulletin 60 https://www.r3vlimited.com/board/images/misc/R3V.jpg https://www.r3vlimited.com/board/ https://www.r3vlimited.com/board/forum/e30-technical-forums/engine-drivetrain/transmission-driveline/10158569-upper-cup-bushing-woes-early-model-shifter Tue, 31 Mar 2026 16:14:07 GMT ]]> BadDays https://www.r3vlimited.com/board/forum/e30-technical-forums/engine-drivetrain/transmission-driveline/10158569-upper-cup-bushing-woes-early-model-shifter https://www.r3vlimited.com/board/forum/e30-technical-forums/engine-drivetrain/transmission-driveline/10158298-fix-for-5th-gear-lean-on-getrag-240 Fri, 27 Mar 2026 13:14:49 GMT Hello everybody long time no post! Last fall I installed the garagistic solid chassis mount shifter, dssr, and New shift linkage. When installing the shift linkage, I think I bent the detent and the transmission according to what the guys at garagistic told me after I describe my problem to them. basically all of the gears have shifted to the right. First gear sits where third gear used to be, third gear sits where fifth used to be, and fifth gear is way the heck over in the passenger’s lap basically. it seems like this isn’t an unheard of problem in the BMW world; colloquially called fifth gear Lean. I was wondering if anybody knew a part number for the detent pins for the transmission for the 240. In my Internet sleuthing, I’ve only really ever found detent pin kits for the E36, And never anything specifically saying that it’s for the e30. I appreciate any and all help. attached are some recent pictures of Ruby since I haven’t put anything on the forums in quite some time. My family and I just moved out of the DFW area and into the Texas Hill country so the driving is going to be a lot better and is a lot more fun in Ruby 🤠
Last fall I installed the garagistic solid chassis mount shifter, dssr, and New shift linkage. When installing the shift linkage, I think I bent the detent and the transmission according to what the guys at garagistic told me after I describe my problem to them.

basically all of the gears have shifted to the right. First gear sits where third gear used to be, third gear sits where fifth used to be, and fifth gear is way the heck over in the passenger’s lap basically. it seems like this isn’t an unheard of problem in the BMW world; colloquially called fifth gear Lean.

I was wondering if anybody knew a part number for the detent pins for the transmission for the 240. In my Internet sleuthing, I’ve only really ever found detent pin kits for the E36, And never anything specifically saying that it’s for the e30.

I appreciate any and all help. attached are some recent pictures of Ruby since I haven’t put anything on the forums in quite some time. My family and I just moved out of the DFW area and into the Texas Hill country so the driving is going to be a lot better and is a lot more fun in Ruby 🤠


]]> Levy3Poop https://www.r3vlimited.com/board/forum/e30-technical-forums/engine-drivetrain/transmission-driveline/10158298-fix-for-5th-gear-lean-on-getrag-240 https://www.r3vlimited.com/board/forum/e30-technical-forums/engine-drivetrain/transmission-driveline/10158181-early-model-dowel-pin-getrag-240-260 Wed, 25 Mar 2026 19:21:24 GMT Any help would be appreciated! Cheers. (Your response will also help influence my Early Model Shifter Rebuild Guide)]]> BadDays https://www.r3vlimited.com/board/forum/e30-technical-forums/engine-drivetrain/transmission-driveline/10158181-early-model-dowel-pin-getrag-240-260 https://www.r3vlimited.com/board/forum/e30-technical-forums/engine-drivetrain/transmission-driveline/10158030-transmission-wiring-for-m52tub28-with-automatic-swap Tue, 24 Mar 2026 19:25:13 GMT
I know this is an e30 forum but I do believe my question could mostly apply to an e30 swap? I have recently acquired a 1982 e21 (US spec) that had been previously converted, very poorly, to M52TUB28 with its GM 5L40 Auto gearbox from a 2000 e39 528i. The car runs and drives, but whoever did the swap did not build a proper swap harness, instead they took the entire cockpit wiring harness and carried that over in a bundle on the passenger floor. As stated, the car runs and drives, so the engine harness was done correct...enough, but that's it.

Not only is this interior mess unsightly, but it's rather dangerous. Well, I am working to clean up this mess by removing everything but what is needed to run the car and make the transmission work. After I get this sorted out I'll take it one proper step further, I have purchased a proper swap harness (Redline) for the e21/M52TU combo, but have not installed it just yet as I also have recently purchased a standalone ECU (DIY-EFI Core4 Speeduino) that will be installed permanently once the wiring is sorted. The ECU from DIY-EFI is a plug-n-play unit, I've already tested it out on this messy harness and it works fantastic...throttle response is amazing. I can blip the throttle 3x in the amount of time it takes for one stock rev, and the acceleration is way better. Anyway, I'll report on the results of the Speeduino unit at a later date, gotta get this transmission sorted first.

I do plan to swap in a 6-speed gearbox in the not too distant future, but those are hard to find and/or expensive, and my job has me traveling very frequently, so until then I will need to make this slushbox work better than it does. One problem I can definitely see is that, since the gearbox has no sort of vehicle/wheel speed reference being sent to the TCU (no ABS in 1982) it shifts through all of the 5 gears by the time I reach about 30 mph (50 kph). Until just recently I could move the gear lever into the Sport position and shift gears manually, but in my attempts to clear out unneeded bits of the e39 wiring I must have disturbed some wire(s) that the gearbox needs? I took great care to not remove anything associated with the Transmission Control Unit or the shifter, all harnesses are intact, and as far as I could find, the factory MS42 ECU did not play a role in the operation of the auto gearbox, but now I only get indications of sport mode, no actual shifts happen?
Anyone out there have any experience doing a similar M5x Auto swap into an e21/e30 and care to help me parse out what little bit I need to make the gearbox work in Sport (manual) mode? I really don't care much about working in full auto mode unless there's an easy solution. I've read all sorts of info about Can-Bus inputs, and needing to program the TCU, but there's gotta be an easy(er) way to make this box work in one mode or the other...WITHOUT needing to keep a ton of wires from the e39 donor car.

So to sum it up, I have the proper M52TU Engine Harness and ECU, I have the Automatic Transmission and TCU that it came with, but I also have the whole e39 front cockpit harness coiled up on the passenger floor, likely because the original swapper didn't want to deal with the EWS Delete (which I've done) and the work needed to trim down to the bare necessities of the cockpit wiring. Thanks in advance]]> bimmeup02 https://www.r3vlimited.com/board/forum/e30-technical-forums/engine-drivetrain/transmission-driveline/10158030-transmission-wiring-for-m52tub28-with-automatic-swap