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

 

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?)

 

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

 

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???

 

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