slipping clutch? get a new one
if it is making a loud knocking noise it is about to go out If when you put it in to gear, it jumps in to it and the car starts to move instantly then the converter may be shot.
The first and cheapest thing that comes to mind: is the shift cable still intact? There is a cable between the gear selector in the cab and the gear lever on the transmission. Crawl under the car, put someone inside to work the gears when you tell them to, find the gear lever, and have your friend move the gear selector. If the gear lever on the transmission does not move, the cable is broken.
well if you put the car in any gear and let out the clutch if you rev the engine and it dosent move or moves a little then it's the clutch but if it's a grinding noise and it doesnt move at all i'd say its the transmission my car was grinding and not moving and it was cause the spider gears were all busted and i had to rebuild my transmission
check motor mounts
If it is a manual transmission it may make a whining noise or, if it is really falling apart, a grinding sound. If it is an automatic, they usually don't make any particular noise. Most of the functions are pressure valves so the transmission just doesn't shift properly or won't move when in gear. If you are geyying a grinding noise but the transmission seems to be functioning okay you probably need to have the flywheel inspected to see if the starter is dragging or the flywheel has broken or cracked.
Just crawl under pull the plastic pin out and move the gear selector its just a plastic clip
That would be your transmission. It may be slipping, or you may be lossing a gear. Have it checked.
When preparing to back up, you would be reversing. In a manual transmission car, this would be the reverse gear. It is typically all the way to the right and on the bottom row.
A car that won't move when in reverse could indicate a problem with the transmission. It could also indicate a problem in the gear selector.
While stopped, and in park or neutral, move the 4wd selector to the desired 4wd mode, put car in drive or 1st gear and drive.
it could be your power steering pump. check your fluid level, then also check to see your not leaking any fluid.