ZF transmission fluid.
 

Players' getting ready to change Transmission & rear end Fluid. What fluids should I use?

Manfred E..........:flag:
91 #906
http://pnwzr1.net

Re: ZF transmission fluid.
 

zfdoc says Castrol TWS 10w-60 full synthetic. It can be bought at the local BMW dealer only & it comes in Liters only. You need 2.2 liters to do the change.

I bought it from this guy the last time as the local BMW dealer is not easy for me to get to.

http://www.velocitymotorcars.com/castrol.html

btw, it's motor oil for an M5.

The rear gear I used Mobil 75w-90 full synthetic plus one bottle of GM posi additive. If you use GM gear oil then use two bottles of posi fluid additive. Or you can use Amsoil sever duty fluid plus one of their posi additive bottles

:cheers:
Tom

Re: ZF transmission fluid.
 

Should the transmission & rear end fluids be changed based on mileage only or should they be changed after a certain number of years as well? I have a 10k mile '94 and my Chevy dealer said not to worry about it.

Re: ZF transmission fluid.
 

After being in there for 17 years I would change both just for the sake of peace of mind.

Re: ZF transmission fluid.
 

Yep, those dealers are all experts. That is probably the same dealer that told Custer, "one last stand and you can go home"! :mrgreen:

Re: ZF transmission fluid.
 

I would just say use this link and read the section on the page about the results of Mr. Boudreau's oil test.

http://zfdoc.com/faq.htm

You can make an educated determination once you have the necessary information. I used his research to determine what my change intervals would be going forward and my car was a one owner car with 7400 miles on it when I bought it back in 12/04.

:cheers:
Tom