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10-09-2005, 11:52 AM
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persistent kickdown cable leak, th350
I have been fighting this kickdown cable leak ever since I got my transmission rebuilt earlier this summer, maybe someone can share some experience and/or advice. It leaked as soon as i put it in the car, so i replaced the o-ring in the cable and gooped it up with permatex. still leaked. Eventually, I replaced the whole cable, which came with the correct flat rubber seal. still leaked. Well i pulled that cable out and saw that there was a tear in the sleeve that I created whilst violently installing it, so i replaced the whole cable again. still leaked. so last night, i took the new one off and gooped it up with permatex. you guessed it: still leaked. What do you think is the problem here?
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10-09-2005, 11:55 AM
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tranny leak
Are you sure its not your cooler lines? when they leak the puddle and fall in the same place a kickdown would leak.
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10-09-2005, 11:57 AM
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tranny leak
Also ive hade bad experiences with the flat rubber ones. mine would leak so i bought one that had 2 orings and it never leaked again.
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10-09-2005, 12:01 PM
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well the coolant lines, as well as the dipstick tube, are above the kickdown cable, and there is no wetness above the kickdown cable so i ruled those two out. Plus I assumed that since the lines are pressurized they wouldn't be able to leak this insane amount of fluid when the car is parked and shut off, that they would just drain out the contents of the lines. of course, i'm no expert so I can't be 100% sure...
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10-09-2005, 12:03 PM
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tranny leak
actually when my cooler lines and kickdown leaked they would only do it when the car was shut off. you would think it would leak while it was running but it didnt. go figure.
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10-09-2005, 12:03 PM
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where can i get one? Anyone else have specific product recommendations? I've been buying just the basic "Pioneer" cables you get at Advance or O'Reilly. Thanks for the help.
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10-09-2005, 12:08 PM
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what about installation tips? I know we've got some tranny pros on the board... is there anything in particular you always make sure to do, say, on a customer's car when installing a cable?
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10-09-2005, 05:52 PM
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350 Leak
Matt, First of all there are two different types of cable end seals, the o-ring and the rubber sleeve type. I am assuming that you are talking about the rubber sleeve type. When you install this type you should but the sleeve into the trans, hook up the cable, then install the cable housing into the trans. This helps to keep the sleeve in the right position. Also when you install the cable housing, keep it as straight and centered as possible to avoid misplacing the seal. I don't personally like to use any sealer on these but I have occasionally to stop tricky leaks. Make sure that there is nothing putting pressure on the cable to hold it off to one side and cause a leak. I know there is not a whole bunch of room to work with but be as careful as you can!
Good luck, Rick
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10-09-2005, 06:33 PM
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this cable has a round rubber seal that looks like a flat o-ring. can either type of cable be used on any transmission, or does the transmission decide which type is used? maybe i should try using the other type...
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10-09-2005, 08:28 PM
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350 Leak
Matt, if the cable housing has a groove on it where it goes into the trans it needs an o-ring that fits in that groove and seals the housing. If it is smooth where it goes into the trans it needs a rubber type sleeve that fits into the trans and snugly on the cable housing. It is more that just a rubber washer, it is kind of like a rubber washer with about a 1/4" sleeve. I don't know of any other seal unless someone else does? Maybe you should go to the parts store or trans shop and buy another seal. Tell them which cable housing you have and they should be able to help you out. The only other thing I can think of is if the aftermarket cable requires a special seal that I am not familiar with.
Let us know what you find, Rick
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10-09-2005, 09:27 PM
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ahhh i think i see what you're saying now ricky... the o-ring style has the o-ring on the part of the cable housing that goes inside the transmission, and the sleeve style has the seal on the flange part of the cable that bolts to the transmission housing. In that case, mine would be the sleeve style. It didn't occur to me to put the seal in first, I was afraid it would fall into the transmission! I'll try that out in a couple days and post my results. Thanks!
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10-09-2005, 10:24 PM
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the rubber sealing sleeve installs into the case first, then the cable slides in... use some oil , fluid , lube of some type.
__________________
At the Bonneville Salt Flats, first gear is known as 130 mph.
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10-15-2005, 10:16 AM
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i've read some other posts where the "sleeve" style is described as looking like a top hat. now i'm confused because mine definitely doesn't look like a top hat, it looks like a rubber washer. here are some pics i took, sorry the pic of the seal is so fuzzy, but i lost it before i could take another one!
[IMG]seal.jpg[/IMG] [IMG]cable.jpg[/IMG]
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10-15-2005, 10:18 AM
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oh and i tried to install this seal into the tranny housing first as crosley suggested but had a pretty hard time getting it square into the hole and getting it to stay in... do you think i might just have the wrong cable altogether?
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10-15-2005, 12:12 PM
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i just took a trip to the gm dealer and they showed me one of the top hat seals, but they didn't have any for my transmission. but at least now i know what you guys are talking about, that seal does look like it would work a lot better. well, i'm trying to locate one right now...
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