Welcome to BGW! You will need to buy the gear set and a new case halve gasket, maybe buy some seals while your at it. The transaxle assy will need the be removed and the axle'axle housings unbolted. The cases will need to be seperated (make shure you take it apart slowly) and keep the gear clusters and shim's as a unit. Change the ring and counter gear, reassemble (with the new gasket) and your going faster. Good luck
