View Single Post
  #3  
Old 06-22-2006, 05:08 AM
HUMTECH's Avatar
HUMTECH HUMTECH is offline
Hummer Authority
 
Join Date: Sep 2003
Location: Canada
Posts: 1,251
HUMTECH is an unknown quantity at this point
Default Re: 15k mile service

Make sure you use a 75/90w synthetic gear oil in both diffs, especially in colder climates. I personally have had lots of positive feedback from customers using mobil one in trans and t-case, but have had no experience with royal purple. Only seen one customer use it as I don't believe it is readily available in Canada(he had it shipped from the US). Just another opinion.
Reply With Quote