The 2000 Rancher 4x4 es is back together and running great after a topend kit and new crank and rod. I am very impressed with the way the wheeler runs but I have a oil leak around the manual "emergency" shifter shaft seal and the rear drive shaft seal coming out of the motor. Has anyone of yall ever replaced these seals with the motor in the frame? What is the best way to get r done? Thanks for any advise......