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      11-25-2016, 07:58 PM   #7
sparky_phantom
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Drives: 2011 BMW 335i
Join Date: Oct 2014
Location: United States

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2011 BMW 135i  [0.00]
Quote:
Originally Posted by Fundguy1 View Post
A more full explanation is from mid 2007 to present, all 335inmanual rear difs have a welded pumpkin. Autos habe a bolted pumpkin. Don't ask me why. The internals in both are an open diff that has electronics apply brakes to the spinning wheel so the other can catch up. I.e. it apllies brakes, not shifts power to wheel with grip. There are several different makers of diffs. I did a full pumpkin swap for about $2k. I did wavetrac because its a bit more street friendly in the corners. Mfactory is another good option similar price point slightly more drag racing friendly. Quaife is like an expensive wavetrac and the makers of wavetrac and Mfactory both have origins at quaife. Then there's other ones $4k and up. Unless you enjoy throwing money out for little to no benefit skip them. One guy said it was quieter. Idk but i can't hear mine. Course mine is louder cause i make more power which is why i got it in the first place.
Thank you for the clear explanation! Was trying to figure out why both tires would spin on my car.
Appreciate 0