Transmission leaking at Speedometer cable - The 1947 - Present Chevrolet & GMC Truck Message Board Network

FLcustom10 · 11-12-2011, 05:14 PM

I had the transmission rebuilt years ago and it leaked immediately at the speedometer cable. I took it back multiple times, but got no satisfaction. They just said I wasn't driving it enough and that would make it leak.

Do you think I need a new speedometer cable or can you make a recommendation on something to seal it?

hjewell2 · 11-12-2011, 05:44 PM

Quote:

Originally Posted by FLcustom10

I had the transmission rebuilt years ago and it leaked immediately at the speedometer cable. I took it back multiple times, but got no satisfaction. They just said I wasn't driving it enough and that would make it leak.

Do you think I need a new speedometer cable or can you make a recommendation on something to seal it?

This might work depending if the threads a crossed or not. First remove spedo cable and clean male threads including removing the RTV with a can of carb clean. Do the same thing to the inside threads and pay attention to the collar where it spins on the cable clean it good if you re-install and hear grinding of dirt on the threads and can wiggle the cable behind the collar and see movement there re-do it. Had same problem on many cars and dirt was the problem every time tranny was pulled. There is no o-ring is in there for the collar.

Hope this helps you.

66skylarkpost · 11-12-2011, 06:17 PM

it has nothing to do with the cable . u need to pull the insert and gear,then replace the seal thats in the inside, sometimes held in with a wire ring and the o ring on the outside . u might need a new gear . since they are plastic, they will wear a groove where the seal rides easily

66skylarkpost · 11-12-2011, 06:30 PM

another pic ... i tried to highlight the gear where the seal wears

FLEET72 · 11-12-2011, 07:15 PM

Quote:

Originally Posted by 66skylarkpost

it has nothing to do with the cable . u need to pull the insert and gear,then replace the seal thats in the inside, sometimes held in with a wire ring and the o ring on the outside . u might need a new gear . since they are plastic, they will wear a groove where the seal rides easily

Quote:

Originally Posted by 66skylarkpost

another pic ... i tried to highlight the gear where the seal wears

Seems to me that a transmission shop should know this. I'd be leery about utilizing them in the future.

hjewell2 · 11-12-2011, 07:24 PM

Quote:

Originally Posted by FLEET72

Seems to me that a transmission shop should know this. I'd be leery about utilizing them in the future.

Very true--this should have been replaced during rebuild.

FLcustom10 · 11-12-2011, 08:42 PM

Thanks guys. I fully agree -- I will not be using that transmission shop again and I will advise others against them also.

hayhauler71 · 11-13-2011, 09:33 PM

Quote:

Originally Posted by FLcustom10

Thanks guys. I fully agree -- I will not be using that transmission shop again and I will advise others against them also.

Maybe you can advise your transmission shop

11-12-2011, 05:14 PM	#1
FLcustom10 Registered User Join Date: Feb 2007 Location: Tallahassee, FL Posts: 322	Transmission leaking at Speedometer cable I had the transmission rebuilt years ago and it leaked immediately at the speedometer cable. I took it back multiple times, but got no satisfaction. They just said I wasn't driving it enough and that would make it leak. Do you think I need a new speedometer cable or can you make a recommendation on something to seal it? Attached Images

11-12-2011, 06:17 PM	#3
66skylarkpost Registered User Join Date: Mar 2006 Location: kearney,nebraska Posts: 443	Re: Transmission leaking at Speedometer cable it has nothing to do with the cable . u need to pull the insert and gear,then replace the seal thats in the inside, sometimes held in with a wire ring and the o ring on the outside . u might need a new gear . since they are plastic, they will wear a groove where the seal rides easily Attached Images __________________ '70 k-10 longbox- mid 70's drivetrain 350/350 487x heads 10.1:1 flowmasters ,35's 3.73's auburn posi ,rear shackle flip. '72 short stepside U.S. forestry truck, '73 455 buick,400 turbo,dropped 2"-4 1/4" ,3.07 posi,:'89 silverado 1500 ,OK truck ,5.7 holley tbi ,trick 700r4 3.07 auburn posi ,and my '66 skylark ,'73 centurion and my '84 monte carlo imca stock car Last edited by 66skylarkpost; 11-12-2011 at 06:23 PM.

11-12-2011, 06:30 PM	#4
66skylarkpost Registered User Join Date: Mar 2006 Location: kearney,nebraska Posts: 443	Re: Transmission leaking at Speedometer cable another pic ... i tried to highlight the gear where the seal wears Attached Images __________________ '70 k-10 longbox- mid 70's drivetrain 350/350 487x heads 10.1:1 flowmasters ,35's 3.73's auburn posi ,rear shackle flip. '72 short stepside U.S. forestry truck, '73 455 buick,400 turbo,dropped 2"-4 1/4" ,3.07 posi,:'89 silverado 1500 ,OK truck ,5.7 holley tbi ,trick 700r4 3.07 auburn posi ,and my '66 skylark ,'73 centurion and my '84 monte carlo imca stock car

11-12-2011, 08:42 PM	#7
FLcustom10 Registered User Join Date: Feb 2007 Location: Tallahassee, FL Posts: 322	Re: Transmission leaking at Speedometer cable Thanks guys. I fully agree -- I will not be using that transmission shop again and I will advise others against them also.



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