: Undo the output coupling and transfer shaft nuts while the gearbox is still bolted to the engine. This gives you a solid point of resistance. You will need a thin-walled 7/8" A/F socket with a maximum outside diameter of 1.812 inches.
A critical section of the details how input rotation matches propeller rotation. Misidentifying your configuration can result in running the oil pump backward, causing immediate clutch slippage and catastrophic component wear. 1. Engine Rotation Exceptions
typically stocks them and offers a reconditioning service for the 12000 series. for an oil seal or gasket kit?