i kno this is mustang but my buddy has an automatic f250 1986 that has reverse.. forward does not move unless he matts it to the floor and it will move very slowly how come? wats the problem

 

is the engine free revving or sluggish?
If its free reving there is a very high possibility that the torque converter may be burned out
also more info type of transmission will be helpful.
I am assuming it is a c-6 correct me if i am wrong

 

it is a c6 but if the flywheel was burnt out would it still work in reverse. reverse is fine. would a vaccum hose be the prob?

 

woops i mean torque converter*

 

The forward clutch is out. Read: tranny needs rebuilt.

The C6 kit is about $100, not including a torque converter which may or may not be necessary.