What kind of gear oil?

Joined
Feb 11, 2008
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304
Location
SoCal
What kind of gear oil should I run in my diffs? 4:11 gears, no lockers, no posi, just standard gears. FJ62 with auto trans and 33" tires. I was looking at some synthetics, should I run 90w or something else?
 
Joined
Jan 20, 2003
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11,195
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Wherever the truck stops!!
80w-90 hypoid gear oil will work. Synthetics will provide better lubrication but will also leak out of questionable seals. If you've never done the seals stick with regular oil, if you've done the seals recently go with synthetic.
 
Joined
Feb 11, 2008
Messages
304
Location
SoCal
by questionable seals are you refering to the diff gaskets, or the inner axle seals? or both?
 
Joined
Jan 8, 2004
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Emerald City
when in doubt - dino. sucks to lose $ synthetic to a leak.

there was a good thread on this just the other day - try a quick search.

rob
 
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