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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2000 Ranger Super cab 4x4- 4.0/3.73's/5 Speed
TBAR max/31x10.50 Yokahoma AT/S

2005 Explorer XLT 4x4- 4.0/3.73's/AUTO

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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2008 Vista Blue Ranger XLT - 2.3/Auto

I use the Valvoline Syn blend

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2001 3.0 V6 Automatic "Police Interceptor"
4x4 Off-Road
3" Body Lift
Belltech 6400 Shackles
JBA Headers
LOKRITE Locker
COBRA disc conversion

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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'01 XLT disguised as a '03 Fx4 Level II.

amsoil full synthetic