61 GMC Hydramatic yoke

[Surfdaddy]

Is the yoke on my Hdyramatic the same as a TH350? or, would a trans shop have a yoke that I can get to replace the one I have. The trans is still leaking out the tail shaft after a few days of sitting. Saturday when I drove it on the freeway I saw smoke come and go. I looked and is coming from the tailshaft, leaking on the cross member and dripping on the exhaust. The only thing I can think of is the yoke is bad causing the seal to leak. I really need to get that fixed first before I tackle any of the other minor problems I have. All in all the truck is working out ok. No big problems just the endless list of minor things that you get with an old car.