Tranny Leaking
Thread Starter
Racer
Joined: Aug 2006
Posts: 403
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From: Huntsville Alabama
Tranny Leaking
I noticed some red drops on my garage floor. It appears to be coming from the rear end of the transmission. Has anyone tried using a stop leak of sorts? Is it worth the money? I know we're only talking a couple of bucks or so. Thanks
Instructor
Joined: Jun 2005
Posts: 231
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From: Waterbury Connecticut
Originally Posted by papafrancisco
I noticed some red drops on my garage floor. It appears to be coming from the rear end of the transmission. Has anyone tried using a stop leak of sorts? Is it worth the money? I know we're only talking a couple of bucks or so. Thanks
I personally would never use a stop leak for anything on my vehicle, engine tranny or cooling system. That could be the most costly few bucks you ever spend. Find the leak in the tranny and see what you can do to fix it. There's a vent on them so if their overfull they may leak from the vent. They also may leak from the vent if they get too hot. 
Race Director
Joined: Jun 1999
Posts: 14,924
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From: Merritt Ils Fl
I am not a big fan of stopeaks of any kind. If used according to the directions I don't think they will hurt. I,for one, wouldn't take the risk.
If your leak is at the very back of the trans it is most likely the output shaft seal. That is not a big job at all.
If your leak is at the very back of the trans it is most likely the output shaft seal. That is not a big job at all.
Race Director
Joined: Feb 2004
Posts: 12,518
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The additives in stop leak are designed to soften and swell rubber seals in hopes of stopping the leak. I too would rather see you change the part that is leaky. If you are tempted to pour in a can of miracle cure, only use 1. More is not better. I can recall a few transmissions that I overhauled that had a few cans added. The o-rings turned into what looked like overcooked noodles. In those cases, stop leak killed the trans dead.
