Transmission model

taibanl · Feb 15, 2011

What is the model code for 335d 2011 transmission

lep335d · Feb 15, 2011

I believe the 335d uses a ZF 6HP28

199179 · Feb 16, 2011

6hp26z

http://realoem.com/bmw/showparts.do?model=PN73&mospid=51054&btnr=24_1016&hg=24&fg=05

magbarn · Feb 16, 2011

Yup and it's the same tranny that's giving used E65s a bad name and poor resale value. I just hope ours are more reliable due to a lighter chassis and later production date.

TDIwyse · Feb 16, 2011

My understanding is the name "6HP26Z" was a code for one of the earlier technical upgrades to the 6HP26, and the official name has evolved to the present 6HP28.

Some of the details of the upgrades can be found here.

http://www.obitet.gazi.edu.tr/technology/teknoloji/ZF SHIFTS.htm

magbarn · Feb 16, 2011

Nice find there, so our trannys are an upgrade from the earlier ZF 6 speeds found in the E65. Hopefully reliability improvement was a factor in the upgrades. We also have a good healthy almost 100 lb feet of margin of safety in improving the power on our engines before the tranny grenades itself.

lep335d · Feb 16, 2011

From what I've read the 6HP26 is the 1st gen used before mid 2009. And the 6HP26Z TU = 6HP28 is the 2nd gen. More torque, 6% improved fuel economy, and much faster upshifts and downshifts.

Here is a nice press release from ZF 6HP 2nd Gen

sukutash · Feb 17, 2011

ZF 6HP28 is what's in the 335d!

DnA Diesel · Feb 17, 2011

Very few N.A. 335d have an original 6HP26. My 3/09-build has a 6HP26TU, which was the same technical upgrade (TU) that was eventually designated the 6HP28.

RealOEM doesn't always get it right -- it still calls our M57Y engine an M57N2...incorrect.

Cheers
D.

bimmerdiesel · Feb 17, 2011

DNA how did you find out your d has 6HP26TU. Mine is 04/09 build date and based on your another post in different thread I assumed even I have same but want to confirm it.

Transmission model

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