727 tailshaft leak help

[Willy The Kid]

So this 727 was rebuilt and once it was filled with fluid it began a very slow leak at where the tail shaft meets the rest of the transmission case. I pulled the tail shaft in car and replaced the seal and it still leaks. Is this common and what should be my next move. I am always super quick at pulling motors/trans in situations like this and i was hoping someone could give me solid advice. Is this common? Any responses are greatly appreciated in advance. And no its not warrantied.

 

[turbine68rt]

Might be the low/reverse servo apply arm shaft that has the o-ring.

 

[66Satellite47]

The easy fix if it is the reverse apply shaft that goes through the case, is to clean it good with brakekleen and fill the outside with RTV. Might work.

 

[dvw]

I've fixed the low band pin with RTV in the car. Press the shaft all the forward. Clean well and blow dry with brake clean.Apply RTV and smooth with a thin putty knife. Or pull the tail shaft housing, pan,valve body. loosen the rar band adjuster. Then remove the band anchor pin. Clean the shaft and bore. Replace the shaft O-ring and reasemble.
Doug