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  #1  
Old 06-19-2017, 11:49 AM
Deanj Deanj is offline
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Default Cruise-O-Matic Overfill?

I'm curious because my transmission has stopped leaking from above where it rests on the cross member. About a year ago I followed directions and drained the transmission and both holes in the torque converter, then added 9 1/2 quarts before filling it to 10 after warming up the transmission.

It leaked before and after servicing. Now it has stopped. Is this possible?

Dean
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  #2  
Old 06-19-2017, 12:03 PM
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jopizz jopizz is offline
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Without knowing exactly where it was leaking it's hard to say. Normally transmissions leak because rubber parts get hard and no longer seal. Sometimes rubber parts will leak in the winter when it's cold and not in the summer when they soften up. If it leaked after you serviced it I suspect it will probably leak again at some point. The most common leak points are the front seal, pan and the shift selector seals. Sometimes it will also leak from the speedometer cable housing. It's usually pretty easy to determine exactly where it's leaking.

John
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Old 06-19-2017, 01:46 PM
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Makes sense John. There goes my excitement. I know it's not the pan. The front seal should have been replaced when the transmission or torque converter were overhauled around 72K and she's almost 82K. Shift selector seals?

Dean
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Old 06-19-2017, 01:50 PM
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The shift selector seals are a very common leak point. They are on the driver side front of the transmission where the shift rods come out so they are easy to spot if they are leaking. If the trans was overhauled they should've been replaced.

John
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Old 06-19-2017, 02:21 PM
Tbird1044 Tbird1044 is offline
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Dean:
If it does turn out to be shift linkage seals, (a couple small o-rings) there is a procedure to change these out in the TRL. It's a bit of a PITA, but can be done without dropping the trans. I did it laying on my back and it worked well.
You might try and use some brake clean to degrease the trans and then try to identify the leak source. With only 10K miles on a rebuild, you should still be in good shape.
If the trans sat for a while, you might try some of the trans sealers. They basically are designed to cause the seals to swell. There will probably be a lot of kickback on this one, but I have had limited success using these.
The trans also has a breather vent and you should make sure this somehow didn't get restricted.
Nyles
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Old 06-20-2017, 11:31 AM
Deanj Deanj is offline
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Quote:
Originally Posted by Tbird1044 View Post
Dean:
If it does turn out to be shift linkage seals, (a couple small o-rings) there is a procedure to change these out in the TRL...
If the trans sat for a while, you might try some of the trans sealers. They basically are designed to cause the seals to swell. There will probably be a lot of kickback on this one, but I have had limited success using these.
The trans also has a breather vent and you should make sure this somehow didn't get restricted.
Nyles
Thanks. You got me on this acronym. What is TRL? Transmission rebuild link? T-Bird Relic lesson? Transport Research Library?

What is the down side of a sealer?

Dean
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  #7  
Old 06-20-2017, 11:39 AM
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Default Cruise-O-Matic Overfill?

The last guess is close, but no cigar! TRL stands for the Technical Resource Library (hence TRL!). There is a sub-Forum for it, or you can enter it by clicking on the link that both myself and John ~ jopizz have in our signature elements. There you will find the answers to many questions and tech tips regarding your Tbirds...
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Old 06-20-2017, 04:30 PM
Tbird1044 Tbird1044 is offline
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Dean:
The only downside I know of, if you add sealer, is that you spent a couple of bucks for the sealer and the trans keeps leaking. When my shift linkage seals were leaking, I tried some sealer and it really didn't help. The o-rings were beyond any help. As I said, I have seen success in some uses, so I figure it's worth a try.
Nyles
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  #9  
Old 06-20-2017, 07:11 PM
Yadkin Yadkin is offline
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I've used a good quality brand sealer on a Cruise-O with a minor leak and it's still holding after two years.
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  #10  
Old 06-21-2017, 10:49 AM
Deanj Deanj is offline
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Thanks everyone. I'll check my leak location (again), and check fluid level before I add any sealer to the case.

One last question: At what highest speed is the cruise-O-matic on this car still able to kick down into 2nd gear?

Dean
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