Starts, but wont move

You will have to repost and reword this problem... you say it wont move, but that it loses power while driving. how is it losing power while driving if it wont move?

SOUNDS LIKE YOUR ALTERNATOR WENT OUT

Time to rebuild the transmission.

check the drop links they don't like bumps. fitted to the anti roll bar and the strut ( suspension strut ) change both side at same time. to check it is these grab it and pull about if it feels like its moving easy then replace. should be stiff and no movement when pulling. these make a clunking sound when they go.

Check your air horn (big rubber boot) to the throttle body. It may have a crack on the underside and when you put it in drive and the engine torques to that side the crack opens and causes it to die.

your torque converter could have went. i feel its definetly your trans. i need more input

ck compression sounds like a blown head gasket between 2 of the cylinders

sounds like you have lost one of the u joints on the front axle. look under the front of the truck up by the front tires make sure they are not bad.

To what degree do you lose power and in what way? Do you loose over-drive or does it loose power and speed (on the streets, highway, or at any speed). From your discription it does sound like either a fuel flow/pressure issue or a clogged cat.

you can check the wheels make sure there on tight and make sure you tie rods and wheel bearings are good