What trans are in our cars?

slow_f22 · 07-11-2019, 11:35 AM

I need a new transmission for my 2015 M235i manual. Does anybody know what trans is in our cars? And if so where is the cheapest place to buy a new trans?

celsdogg · 07-12-2019, 08:19 AM

ZF GS6-45BZ

amw896 · 07-13-2019, 08:11 AM

https://www.getbmwparts.com/oem-part...IFJlc3VsdHM%3D

much cheaper than I thought it would be.

opmike · 07-19-2019, 02:25 PM

Why did you end up needing a new transmission? What lead to the failure?

celsdogg · 07-22-2019, 09:21 AM

Quote:

Originally Posted by opmike

Why did you end up needing a new transmission? What lead to the failure?

I'm interested to know what happened here also!

XutvJet · 07-22-2019, 11:23 AM

1-2 syncronizer failure. The most common problem with ZF GS6 series transmission. 1M, 335is, M235, F3X 3/4 series, and M2/3/4 have all reported cases of 1-2 syncro failures. Numerous automotive publications have noted grinding on high rpm 1-2 shifts in M2 and M4 cars on test cars.

If you have 6MT, I strongly recommend the following:

1) Avoid hard, high rpm shifts

2) Avoid hard and aggressive shifting until the transmission fluid is fully warm (about 10 to 15 minutes of driving).

If you add power mods, you're greatly increasing the torque loads on the transmission. You should be VERY careful with that 1-2 shift. The OP bought his car used and started having issues shortly after getting it. The prior owner likely did it in.

07-11-2019, 11:35 AM	#1
slow_f22 Private First Class 17 Rep 101 Posts Drives: m235i Join Date: Mar 2018 Location: delaware iTrader: (0) Garage List 2015 m235i [0.00]	What trans are in our cars? I need a new transmission for my 2015 M235i manual. Does anybody know what trans is in our cars? And if so where is the cheapest place to buy a new trans?
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07-12-2019, 08:19 AM	#2
celsdogg E4 Mafia 323 Rep 412 Posts Drives: E30, E36/5, E46, F22, F30 Join Date: Apr 2018 Location: MD iTrader: (0) Garage List 1990 BMW 325i [0.00] 1998 BMW 318ti [0.00] 2003 BMW 325i [0.00] 2015 BMW 335i [0.00] 2015 BMW M235i [0.00]	ZF GS6-45BZ __________________ Squad - '90 E30 325i MT (225k) \| '98 E36/5 318ti MT (153k) \| '03 E46 325i MT (152k)\| '15 F22 M235i MT (60k) \| '15 F30 335i MT (80k) KIA - '91 E30 325i AT (146k) \| '02 E46 325i MT (212k) Bring back the purple M stripe
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07-13-2019, 08:11 AM	#3
amw896 Major 583 Rep 1,117 Posts Drives: 2015 BMW M235i Join Date: Feb 2016 Location: ontario iTrader: (0) Garage List 2015 BMW M235i [10.00]	https://www.getbmwparts.com/oem-part...IFJlc3VsdHM%3D much cheaper than I thought it would be.
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07-19-2019, 02:25 PM	#4
opmike New Member 9 Rep 8 Posts Drives: '15 BMW M235i Join Date: Feb 2017 Location: USA iTrader: (0)	Why did you end up needing a new transmission? What lead to the failure?
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07-22-2019, 11:23 AM	#6
XutvJet Major General 5538 Rep 5,364 Posts Drives: 2011 Cayman Base, 2016 M235 Join Date: Mar 2016 Location: Kansas City iTrader: (-1)	1-2 syncronizer failure. The most common problem with ZF GS6 series transmission. 1M, 335is, M235, F3X 3/4 series, and M2/3/4 have all reported cases of 1-2 syncro failures. Numerous automotive publications have noted grinding on high rpm 1-2 shifts in M2 and M4 cars on test cars. If you have 6MT, I strongly recommend the following: 1) Avoid hard, high rpm shifts 2) Avoid hard and aggressive shifting until the transmission fluid is fully warm (about 10 to 15 minutes of driving). If you add power mods, you're greatly increasing the torque loads on the transmission. You should be VERY careful with that 1-2 shift. The OP bought his car used and started having issues shortly after getting it. The prior owner likely did it in. __________________ The forest was shrinking, but the Trees kept voting for the Axe, for the Axe was clever and convinced the Trees that because his handle was made of wood, he was one of them.
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