1993 5.0

What brand of tranny fluid do you guys use?

and what rear end fluid do you guys use, (brand and weight) and do we have to add friction modifier?

Thanks

U S Marine

I use Castrol synthetic trans oil. Rear end Valvoline 80/90, although, I'm going to change to Royal Purple when I do my gears. As far as friction modifier, it depends on type of carrier you have. Clutch type, yes. Cone type, No.

PRO50SC

I use Royal Purple in my trans and diff. Most synthetics already have the friction modifier in it. The Royal Purple does. 75/90 in the diff and the trans uses automatic fluid.

1993 5.0

Thanks for the reponses.

So the manual trans uses AT fluid right?

PRO50SC

Yup