HELP! I've got a 1963 Series 62 convertible with about 140,000 miles on it. I developed a trans leak . I took it to the shop I use that specializes in classic cars, but they are less familiar with this transmission. They indicate it is relatively rare (few cars, few years). They are going to engage a transmission shop to take a look at it and do any repairs. They are concerned about getting parts for it, and that if they break into it and it needs more than just simple repairs and asked if I'd consider a transmission swap to a more modern transmission.

I'd like to control my cost, and while my car is no concourse car, I love having it. I did not notice the transmission slipping. The noticed some slipping, but that could be related to the lower fluid level from the leak. The leak appeared suddenly (no leak to puddle after not driving for a few days)

I'd love to get some advice.

1. Anyone have a source of a known good transmission? (I know it will be $$ to ship)

2. Any thoughts on source for parts for the unit?

3. Any thoughts on fix or replace (i.e., likey major issues or likely easy fix - I know there is no real way to know, but generally how well do these hold up?)

3. Any thoughts or recommendation for a replacement trans. If I go this route, I'd want to go with something that facilitates an engine swap if I ever want to put in LS or similar in in the future.

Any thoughts or experience in this area much appreciated!

Karl Schwarz
Centreville, VA

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You have a hydramatic trans in your 63

Not rare at all —and in many many  year  Cadillacs prior to 63 in NJ should have any parts you need to repair it 

I would take back the car and find a trans shop  yourself that will do your trans or you will be paying your shop an extra fee for there service ( for doing nothing )

You are correct — the trans does not shift up —correctly when the  trans fluid is down a quart but does not ever slip 

If it is slipping clutches need replacement 

The trans dip stick is marked —-in pints 

Jason Edge on here has hydros that worked when pulled out —but they need a rebuild ( gaskets dry out with no fluid in the trans and sitting  for a while ) 

I have no suggestions for a replacement—  trans 

Keeping and repairing the stock trans would be the only way I would go or you are devaluing the car making it an abortion ( as in the news lately )

Your  engine trans interaction is  part of what makes our years the enjoyable Cadillac ride we love 

Do you know yet the exact  location of the trans leak ? ?  That is needed to determine the repair needed

Just top off the fluid  and check it at operating temp with the car running until you repair the problem 

Just my 2 cents and opinions 




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