My 92 5.0 AUTO shifts hard into reverse and into drive. When the engine/trans are cold its is particularly worse. It will shift hard when being put into gear and sometimes shift hard from 1st to 2nd. When i turn overdrive off it goes away a little but the problem is still there so im thinking my overdrive gear is ok. My out-put shaft is tight but the rear pinion seal and rear u-joint are somewhat questionable. Also at 70mph the whole truck begins to shake, i am in 2wheel and both hubs are free so it is not the 4x4. Any input helps out! Thanks!

 

Not sure if you got this fixed or not but I just ran into this problem and it was a 15amp fuse that was blown... check your fuses.

 

Thanks, and really a fuse caused hard shifting? That is the oddest thing I've ever heard...

 

Thanks, and really a fuse caused hard shifting? I have never heard of that.

 

Ujoints....Get HD ones w/o the lube port.

 

u-joints indeed.

 

It's the transmission interlock fuse at the very top of the fuse panel that you can hardly see... It's a 15 amp fuse