Hello,
My dad just recently passed away and I am now the owner of his 1989 F 150 XL 4x4 with a 4spd manual transmission. The truck has only 62k miles on it. My question is what kind of fluid does this transmission require? I am in the process of servicing the truck.

It seems like the majority recommends gear oil but the Ford do-it-yourself manual I bought of off Ebay states the manual transmission takes MERCON Auto Tranny Fluid part # xt-2-QDX.

Just trying to get the truck serviced before I deploy again in a few months.

Any help would be much appreciated.

 

For the four speed trans you will need something like 80w90 gear oil. For the transfer case you will need auto trans fluid.

 

Thanks for the info, appreciate all your help.