Fluid Change

[hockeyfan]

Hello I am new to the forum. I recently purchased a 1990 b2. I would like to change the front and rear diff fluids. Should I use 80w90 in both? Also what should i use in the transfer case? thanks for any help.

 

[Rico]

Somebody correct me if I'm wrong but the diffs get 90w and the transfercase gets 140w. That what my f150 calls for.

 

[Wicked_Sludge]

the diffs get gear oil...weight isnt important.

transfer case uses dextron III ATF.

 

[hockeyfan]

aprox. how much gear oil would i need for both diffs and atf fluid for the transfer case so i don't buy to much or to little?

 

[Rico]

My 1979 f150 took two quarts in the front and transfer case and three quarts in the rear.

 

[Wicked_Sludge]

the transfer case takes just over 1 quart. front axle takes 1.75 quarts and rear takes 2.5 quarts.