Ok I simply took out the drive shaft to replace u joints and center support bearing. I replaced all joints and bearing then put shaft back in. I did not remove anything with trainy or rear gear. I left the rear joint on the diff. i had everything marked before i took it out and put it back into place the same as i took it out. I then greased all zerts and started her up and backed out of garage. then i tried going into low gear it didnt make any sound or move in any gear except reverse. I got in back to garage and let it sit till this morning when i posted this thread. After i posted this thread i went out and tried to figure out what went wrong. I lifted the rear end up and tried again to shift in low and Low and behold the damn tires moved in every gear. I lowered truck put it back into gear and i heard a noise and off I went every gear works fine. No noise and smooth. I will now take for a longer run around block and see what happens.
THANK YOU FOR REPLYS IM GLAD TO SEE THERES HELP!!!!