I need to replace the bushing in the rear of the transmission that is the outer support for the front of the universal joint. the transmission is a 3 speed on the tree, serial # LO 72823. what is the procedure to replace this bushing? I was told by one of our suppliers that there is a external bolt that holds the collar containing the bushing, but there is no external bolt visible. anyone done this with out removing the tranny and disassembling it???? HELP!