hi i have a 1999 f150 4x4 5.4l. i was driving up a wash and went to turn around, when i put it in reverse it acted like it was in neutral then when i put it in park it made a snapping/ grinding noise. it wont go into any gear and even when its in park you can roll the truck back and forth. any idea what it might be? thanks

 

I know this might sound dumb, but did something in the rear end snap? Try locking the hubs in and see what happens.

 

rearend is good. any other suggestions? any solenoids on the tranny maybe?

 

Have you checked the shift linkage for damage?

 

linkage is good. i pulled the tranny and took it apart. all the gears are good. could it be the converter or something electronic? thanks

 

maybe something in the tranfer case..... no matter what gear you have it in, even park... if the chain in the x case broke then NOTHING will work

 

If you know enough to rip the tranny apart and inspect gears then you should be able to figure out what's up and do a overhaul.