ZF transmission fluid. - ZR-1 Net Registry Forums

tomcat · 01-31-2011

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

Manfred E..........

tomtom72 · 01-31-2011

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

Tom

AT T 2D · 02-01-2011

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.

Jagdpanzer · 02-01-2011

Quote:

Originally Posted by AT T 2D

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.

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

ittlfly · 02-01-2011

Quote:

Originally Posted by AT T 2D

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.

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

tomtom72 · 02-01-2011

Quote:

Originally Posted by AT T 2D

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.

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.

Tom

01-31-2011	#1
tomcat Join Date: Jan 2004 Location: Vancouver Washington Posts: 238	ZF transmission fluid. Players' getting ready to change Transmission & rear end Fluid. What fluids should I use? Manfred E.......... 91 #906 http://pnwzr1.net

01-31-2011	#2
tomtom72 Join Date: Dec 2004 Location: Jacksonville, FL USA Posts: 4,645	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 Tom __________________ 1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member Last edited by tomtom72; 01-31-2011 at 06:18 PM.

02-01-2011	#3
AT T 2D Join Date: Jun 2010 Location: Charlotte, NC Posts: 28	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. __________________ 1989 Turbo Trans Am Indy Pace Car 2002 Collectors Edition WS6 Trans Am 2008 MINI Cooper S 2008 Corvette Convertible