Good evening,
I would replace the rear main oil seal while you have the transmission out. It is a matter of removing the flywheel bolts and the seal is right there.
Replace the transmission mount as well.
The torque converter.
Check the universal joints in the driveshaft for any play or stiff moving.
The transfer case, there is a gasket and seal for that. Make sure you replace them.
Roy
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Thursday, November 14th, 2019 AT 6:07 PM