HI all. I am servicing the transmission fluid on my Zf6. I went to the stealership and they said full synthetic ATF and their brew is 25 a pop. I saw Mobil and Castrol I believe at the parts store at 9.97, said full synthetic Mercon compatible. Will these do? The stealership brew any better?

Any tips, caveats and gotchas? (I know remove the inspect/top plug first). I tried loosening this morning but was tight and I might need a breaker bar. I hope these are not reverse threaded, but I have puny arms. Can I use PB blaster or are there gaskets I have to worry about.

Thanks

 

im going to use scheaffers ATF in mine when i change it soon.

 

well i recently swapped my ZF6 and the tranny shop said to run a 10-40 synthetic motor oil.

 

Almost 6 qts just for the trans and just less than a qt for the transfer case. I'm using redline D4 ATF and am happy with it so far. Shifts are improved over the factory syn that had 10k miles on it.

 

i got about 2 1/2 qt's in the t- case and about 7 1/2 qt's in the tranny.

 

Correction, the t case takes 2 qts so I must have that in there. Just fill it till you can feel fluid.

Welcome to guzzle's Transfer Case Fluid Change Web Page

 

i had my t-case off and standing up so i have it a little over full. not by much tho.

 

So any Mercron VI will do? Do they even have 10-40 syn motor oil in parts stores?

 

i got mine at autozone.

 

I would not run gear oil or motor oil in the trans, just ATF as recommended. Here's the red line fluid I'm running at almost $11 a qt:

Red Line Synthetic Oil 30504 - Red Line Synthetic Automatic Transmission Fluids - Overview - SummitRacing.com