1989 Jeep YJ

Transmission problem
1989 Jeep YJ 6 cyl Four Wheel Drive Automatic 134000 miles

I have a leak at the selector shaft seal. First, does this require both a seal and an O-ring to repair? Second, how is the linkage removed to access the seal, and is this something I should be attempting? I have the top of the transmission exposed via the interior of the Jeep and it is definitely the selector shaft seal that is leaking.
Frank Crumit
August 21, 2010.

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