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Got some seepage pinion seal 8 3/4 489 case , Any one ever change one ??
Iv'e done a few. Pretty cut and dry on 741 and 742 center sections. A breaker bar and a pipe to extend the handle to break the pinion nut loose, remove the yoke and seal. Then replace the seal and yoke and torque to spec. Problem is you have a 489 case which most likely still has a crush sleeve in it. When torque the nut you can change the gear set up by crushing the sleeve further pulling the pinion gear further out. If you are careful you can still do it the sleeve is pretty tough.