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Originally Posted by Spielmp3206
This topic is quite interesting and on time for my next steps,
I am looking to get an LSD for my 128i and checked the options that diffsonline provide for the 128i and I only saw the oem 3.23m the 3.64 and 3.73, there are some other crazy options like 4.1 or 4.44 but those would be just way too much.
I currently have the 3.73 in my manual 128i and I really like it, even in highway is really not bad to cruise at 75 at a little over 3k rpm. However I would consider the 3.64 if I decide to go with a diffsonline unit it just depends on the budget to continue the project next year.
now that you mentioned that the 330i diff works, I might try to find a 330i 3.64 diff on ebay, buy a wavetrack lsd and put it together myself, the units that diffsonline offer are sweet but pricey  |
Alright so I looked into E90 330i automatic differentials with 3.64 gears, the input flange/pinion yoke is the three-bolt style, as opposed to our 6-bolt circular flange - but otherwise it looks like the rest would work. 3.46s out of a 135i are also the same story with yet another yoke/flange. I'm fairly confident someone could DIY swap it, but I also know pinion preload is a pretty important thing and grenading a gearset on the highway sounds like a bad time.
Doesn't quite seem worth it for me right now, I'd just go with the 3.73s and
know that the thing is set up right. I've set up a more than a few diffs on my old 240, but not sure if it's worth the gamble on my "reliable adult car". I'm becoming older and "sensible". Time to put me down I guess.
Next step would be to verify the pinion gears themselves have the same spline dealio for the flange to swap over, before dropping cash on a unit that won't work. Realoem would be helpful here, maybe I'll look at the interchange tomorrow just for shiggles.
An alternate route, if you're desperate enough: You could use any diff above if you also snagged the companion driveshaft. Then you would then have to take both driveshafts to have a driveshaft shop frankenstein them for a few hundred bucks.
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Originally Posted by Spielmp3206
I think we are pretty close if you want to try out a manual 128i with the 3.73 just let me know  |
Yo that's awesome man! I would love to take you up on that, your car is super sick! Not sure if you winter drive your car or not, but we could meet up out in Highland area sometime and hit up some backroads. PM me if you want.