HERE GOES THE STORY MY REAR END WAS WHINING AND I HAD THE PARTS TO REPLACE PINON GEAR BEARINGS AND CRUSH SLEVE AND OIL SEAL. SO I TOOK EVERYTHING APART AND PULLED THE AXLES OUT AND TOOK CARRIER OUT AND REMOVED PINON GEAR AND GOT ALL THE OLD BEARINGS OFF. PUT NEW BEARINGS ON AND PUT EVERYTHING BACK HAVING TO DO WITH PINON AND IT SEEMS FINE. WHEN I GOT BACK TO INSTALLING THE CARRIER UNIT I PUT IT IN JUST LIKE IT CAME OUT AND IT LOCKS EVERYTHING DOWN YOU CANNOT TURN PINON OR ANYTHING LOOSEN BOLTS AND IT ROLLS FINE. PLEASE HELP