1950 Hydramatic Transmission Tail Shaft Gasket

[jackworstell]

Bob


Sure would like to have the dimensions of the tool you had made up...

Jack Worstell      jlwmaster@aol.com

[Caddy Wizard]

A little update - I called over a mechanic friend of mine who had a scissor like puller that worked the same way as these Kent Moore tools. He was able to get it out, but after it all was put back together the shaft started leaking again. I'm suspecting either the seal is a dud (I should have gotten a Fastco brand seal like Art mentioned) or the tiny crack we found in the housing is the problem.

Either way, I'm putting a pan under it for now while it goes through body and paint. Once the car is one piece again I'll resume my adventures. Thanks for all the awesome help!

Get a seal from FATSCO.  Polish the end of the driveshaft tube with super fine sandpaper (at least 1000x).  Test fit the new seal on the driveshaft tube.  Then install the new seal.

Unlikely that the crack extends past the seal and causes the leak.  That would be a pretty big crack.

[CadillacGlasses]

Hi Christopher,

That is a good point - I did notice play in the shaft when under there. I will keep this in mind when inspecting!

To answer Wayne's question, the leak seems to be just as bad before replacing the seal, so it would make sense if something other than the seal is causing this.

[Caddy Chris UK]

RE: Kent Moore Tool J-2623 seal removal tool.

<<extract from post #14 of this thread>>...Fortunately a fellow CLC member gave me the dimensions for the Kent tool used to remove the seal....
Keep Cruzin,
Bob Kielar

Hi Bob... (and all) thanks for all the great info on seal replacement in this thread. I'm about to undertake both the diff pinion seal and the hydramatic rear oil seal on my '51 Coupe de Ville.  I wonder if you might still have the dimensions of the Kent Moore tool that you had made up please? If so, that would be very handy indeed.

Many thanks.
Chris Todd.

[Jay Friedman]

A bit off the subject, but here goes anyway.  My '49 has a manual transmission, whose rear housing uses the same seal with the same driveshaft yoke as a Hydramatic.  I've only ever been able to get the rear seal out by removing the rear housing from the transmission, then driving it out from the inner end of the housing using a long punch and a large hammer.  Even then it required heavily banging several times.  Point is that seal just wants to stay where it is.

[PHIL WHYTE CLC 14192]

RE: Kent Moore Tool J-2623 seal removal tool.

Hi Bob... (and all) thanks for all the great info on seal replacement in this thread. I'm about to undertake both the diff pinion seal and the hydramatic rear oil seal on my '51 Coupe de Ville.  I wonder if you might still have the dimensions of the Kent Moore tool that you had made up please? If so, that would be very handy indeed.

Many thanks.
Chris Todd.

I've sent you a PM

[Joe G 12138]

I see that this older thread has resurfaced. I would like to add that since the original post, I have also successfully used the J-2623 on GM TurboHydramatic 350 and 4160 automatics, although this tool was invented long before those transmissions were on the market.  Joe G

[Bob Kielar]

Sorry I'm late to the party😁 Here is a picture with the finished tailstock seal removal tool and also the dimensions. I might have posted this on the closed down Mid-Century Cadillac forum. I wish there was a way to retrieve all the information from that site.

Keep Cruzin,
Bob Kielar

[Chopper1942]

A temporary cure for the crack leaking is to clean the area around the crack and use GMS or JB Weld to seal the crack. The problem with cracks is they usually continue to grow. To stop the crack you need to drill a very small hole at the end of the crack. This will work as long as it is not a pressure leak. I have repaired cracked and porous transmission cases this way