For the diffs what do I put in them, gear oil? And do they get a gasket or just RTV? And what do I fill the Tcase with? Its a 94' f150 5sp 4x4

 

The diffs and t-case both use gear oil, usually 80-90 weight. The diff cover uses a gasket but it is a good idea to put a little rtv on it before you torque it to spec. The rear diff takes almost three bottles of lucas 80-90 weight.

 

My 94 F150 owners manual says to use Mercon in the transfer case, BW 1356.

Haynes says to use hypoid gear lube in rear diff and gear oil in the front diff. And to add friction modifier to limited slip diff. (4 oz for 8.8" and Dana, 8oz for 10.5"

 

Yes it is important to use friction modifier in the rear diff if it is limited slip. I learned that the hard way.

 

Snookered is right, my transfer case had atf in it so that's what I used when I filled it up.

 

Dont be a ***** straight sixty thats how we roll.

 

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I got Valvoline 80-90, and got the friction stuff, do I only put it in the rear?

 

Friction modifier is for limited slip diff's. I don't know if your front axle is limited slip or not.

Someone here knows?


Lots of video on youtube- http://www.youtube.com/results?searc...+rear+end&aq=f

 

diff= 80-90 gear oil... id go ahead and buy the LSD additive, and when you pull the cover off, see if you have the clutch packs or not, if not just return it...

tranny/t-case= mercon ATF