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Home » Public Forums » GMCnet » 3.70 limited slip - oil type (New install and break in)
3.70 limited slip - oil type [message #163201] Fri, 16 March 2012 16:06 Go to previous message
John Heslinga   Canada
Messages: 632
Registered: February 2011
Location: Edmonton, Alberta, Canada
Karma:
Senior Member
Most of my Power Module I've been working on is now in place and it's time to add fluids.

I purchased a new 3.70'limited slip Diff from Applied. Jim did tell me what I needed to fill it, but now I want to be sure I remember correctly. [I have a mind like a steel trap - "Rusted Shut" (grin) ] it's interesting that with my search of the many discussions on the upgraded diffs, the actual lube oil was not identified.
This a fresh new unit and it will need breaking in and I will need to keep warrantee specs satisfied. I believe that I should fill it with extreme pressure 80W-90 gear oil with no additives for the limited slip. Then drain after 3000 miles. I also understand that the refill should be with synthetic 80W-90 and no additives.

Looking for (at least) a few confirmations or corrections from those of you who have one yourself please.

I love the discussions and differences of opinions Because they are generally informative as well. Therefore, if you have anything to add to the discussion- Go For It

Thanks


John and Cathie Heslinga 1974 Canyonlands 260 455, Manny tranny and 1 ton, 3:70 LS, Red Seal Journeyman, DTE, BEd. MEd. Edmonton, Alberta
 
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