[Shawnalston10]

Usually on cold starts when I start to drive occasionally my 2nd gear will Rev a little higher before it shifts and I think it has done it on 3rd gear too. Is this transmission slip or something else and has anyone else experienced this? My car is a 2011 335i

[335xi_full_throttle]

Originally Posted by Shawnalston10

Usually on cold starts when I start to drive occasionally my 2nd gear will Rev a little higher before it shifts and I think it has done it on 3rd gear too. Is this transmission slip or something else and has anyone else experienced this? My car is a 2011 335i

I remember reading about how the car will do that when cold to warm it up a bit faster. But I'm not 100% sure. Mine does it in 2nd while driving out of the neighborhood when it's really cold outside.

[Jwallace410]

Yea man, I had the same "issue" when I bought my e93. My searches on these forums found it's basically due to software in the trans, which is standard and common. Not an problem.

I had to flash my trans with" xHP stage 2" for my custom tune and the "slipping/over rev" is gone. All my other shifts are firm and precise when going WOT, but super smooth when slow poking around town.

[vespa]

Normally this transmission locks the torque converter as soon as possible but it has a special cold start routine that allows extra slippage to help warm up the fluid.