Replace U-joints.
Brake - Shift Interlock
It's probably either a worn/warped clutch plate, the clutch is out of adjustment or the pilot bushing/bearing is not operating properly.
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what are you wanting to take the transmission out completely or what?
Check all the linkage from the transmission.
The shift solenoid on a 1998 F150 is on the fender well. It is mounted with bolts and requires a socket set to be removed.
Your u-joints are worn out.
the shift siliniod for AOD transmission is bad. it cost about 30 bucks and is usually special order
Fix the engine
Reverse rotation Dana 44 twin traction beam
The transmission may shift hard due to it beginning to fail. However, it may also be due to low transmission fluid.
My Mom had the same problem with her truck.. It is due to a recalled part that is on the brake master cylinder