That's a little heavy, 75W90 GL4 (Redline MT90) is what I use.

If it ain't broke, don't fix it. You might have shortened the bearing life, but... they will talk to you if you did.

The FSM details changing the rear seal, its straightforward. That baby would have to leak like a sieve to drain your tranny though, the bottom of your truck would be wet!

I'd say the PO went to Jiffy Lube. <img src="/forums/images/graemlins/barf.gif" alt="" />

-Bill
'87 4Runner w/ '96 5VZ-FE, 'Red Chili II'
'97 Taco XtraCab 3RZ-FE, 'BlackBean'
TLCA # 13257, Rising Sun 4x4 Club Land Use Coordinator
"He who stops being better stops being good." -Oliver Cromwell