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  #1  
Old 01-19-2010, 01:47 PM
TGDKY TGDKY is offline
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Join Date: Jan 2010
Posts: 59
Default best gear oil?

going to change front and rear diff fluids-what does everyone prefer


Mobil 1- 75-90 full syn
mobil 1-75-140 full syn
lucas 80-90
valvoline 80-90 syn blend

both stock axles- 8.8 rear
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  #2  
Old 01-19-2010, 02:40 PM
BlutoBodine BlutoBodine is offline
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Figure someone will say Royal Purple - I'll mention Amsoil Severe Gear 75W-90. Depending on what I have on the shelf at the time that I need it, I usually use Lucas, Amsoil or Royal Purple.
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Old 01-19-2010, 06:20 PM
Ranger01 Ranger01 is offline
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I use the Valvoline Syn blend
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  #4  
Old 01-19-2010, 07:24 PM
Fx4wannabe01 Fx4wannabe01 is offline
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OEM spec is 80W90.

I run 75W90 Royal purple(RP is full syn) in both axles, with friction modifier in my rear axle to make it super slippery in the rear with my locker.

I wouldn't run anything 140 on anything on the truck.....that's superthick crap and in a colder environment, it'll goo up.
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  #5  
Old 01-27-2010, 04:12 PM
whitelightening whitelightening is offline
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amsoil full synthetic
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