drhach Posted August 14 Share Posted August 14 There's no graceful way for getting a transmission in and out of a car when it's on jackstands. I've done it many times. It always sucks. Keep your kids away because you will be swearing. 1 1 Link to comment Share on other sites More sharing options...
Fleetwood Meadow Posted August 16 Author Share Posted August 16 Well I was hoping for a more definite answer.. I took off the torus and looked at the front seal. It looks new. I see no rips or obvious problems with it. The seal for the flywheel was not ruptured or leaking before I unbolted the torus cover. Neither was the drain plug. Since the rupture happened after revving the engine is there a pressure relief spring/valve I should check next? 1 Link to comment Share on other sites More sharing options...
Fleetwood Meadow Posted August 16 Author Share Posted August 16 1 Link to comment Share on other sites More sharing options...
Roger Zimmermann Posted August 18 Share Posted August 18 The Hydramatic from 1956 to 1963 are more or less my "specialty". I don't know the previous models, but something is looking similar: the torus cover assembly from your last picture. The hub is most probably welded to the torus. Last year I had a problem with a '56 Hydramatic: there was a massive oil leak.I replaced the seal, but the leak was still there. After some message exchange with people I know, I did a leak test with the torus cover assembled with the flywheel, inflating the whole with air. To my relief, there was a leak at the weld. A small local shop rewelded the neck; the issue was solved. The first picture is the assembly with compressed air ; the second picture is showing the new weld. I don't know if the previous Hydramatic transmissions had this issue. If you can test it you are then sure that tho problem is at another place. 6 Link to comment Share on other sites More sharing options...
pfloro Posted August 18 Share Posted August 18 (edited) 8 hours ago, Roger Zimmermann said: I don't know the previous models, but something is looking similar: the torus cover assembly from your last picture. The hub is most probably welded to the torus. Roger is on to something here. The new "controlled coupling" Hydra-Matic debuted in 1956 and dropped out in about 1964. Although the internals of the "Model 315" were quite different from the 1st generation HM, I suspect the fluid coupling was very similiar. Neither design used a torque converter (that arrived in 1964 with the Turbo Hydramatic 400). I would reassemble your fluid coupling, take it to the shop which rebuilt your HM in 2022, and have them inspect & pressure test it. I could see how fluid would be thrown out and away from a quickly spinning coupling. Maybe the "tink-tink-tink" sound you heard was the hub weld giving way... FYI: Based on the GM division, the "controlled coupling" HM was known by various marketing names... Olds called it "Jetaway", Pontiac called it "Strato-flight" or "Super Hydra-Matic", and at Cadillac, it was known as the "Hydra-Matic 315"... Paul Edited August 18 by pfloro (see edit history) 1 Link to comment Share on other sites More sharing options...
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