Quick Question-Transfer case fluid
 

Manual calls for AUTO-TRAK II FLUID
What does that equate to in Royal Purple

RE: Quick Question-Transfer case fluid
 

Hey, I'm wondering myself...? Did you ever find out? What did you go with?

The Royal Purple Synchromax??


Also, anyone know what to run in the f&r diff's of a GMC Sierra '02 Z71?
Royal Purple 75W90, or the Royal Purple 85W140???

Looking for some help here! Thanks.


(oh also, what are the quantities needed for each?)

RE: Quick Question-Transfer case fluid
 

Hey shredsled, props for searching your question before asking. I googled and most other postings/forums say there is NO sub for the GM fluid. However, Royal Purple has a cross-reference section on their site. BUYER BEWARE, ya know:

http://royalpurple.com/transmission-chart.html

RE: Quick Question-Transfer case fluid
 

hey, darren mccarty fan, thanks for the reply, and props. Yeah, I did a quick search hoping to turn up some solid info... but hard to find any.

Hmm, not sure if I want to be one to guinea pig the Royal Purple in the Auto-Trac transfer case. Might stick with the GM fluid in that particular case.


Do you know off hand which viscosity to put in the Diff's???

RE: Quick Question-Transfer case fluid
 

I'd like to have somethin more helpful to say but I have no idea what viscosity :)

Mac's on permanent IR. Here's to the glory days :)