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Unread 04-17-2015, 09:48 AM   #1
dtbingle
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2011 KK Liberty 
 
Join Date: Apr 2012
Location: St. Clair Shores, MI
Posts: 119
2011 Liberty - Slow trans fluid leak from gasket

After replacing trans fluid/filter awhile back, I ended up overtorque'ing one of the pan bolts and stripped the threads on the aluminum transmission housing. Due to this, it was slowly leaking ATF, so I had a shop fix it, which they said they put in a helicoil. The slow leak was still there. After this, I brought the jeep to the dealer, who straightened the pan out, put on a new gasket, refilled fluid, etc. A few weeks later when the weather got warmer, I noticed it was slightly wet with ATF around the gasket with a few drips on the pavement below. The vehicle is currently at the dealer again and they are going to take another look and possibly end up just putting on a new pan.

If this doesn't solve the slow leak, is there anything else I can try? Get rid of rubber gasket and use black RTV/gasket maker? Keep rubber gasket and also apply the RTV/gasket maker? Any other recommended products/solutions?

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Unread 04-17-2015, 06:45 PM   #2
Oban
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2012 KK Liberty 
 
Join Date: Dec 2008
Location: Chicago, Illinois
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The KK comes with RTV on the transmission pan from the factory. Given the multiple bolt holes, the vibrations, exposure to various temperatures, and so on, I was never a fan of using an aftermarket gasket. If used properly, RTV is great (meaning you put RTV around the bolt holes, not just on one side, etc).

Also, I would install a new pan. They are cheap anyway. Straightening them out only goes so far. It will never be 100% true if it was bend out of shape.
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Unread 04-17-2015, 11:03 PM   #3
Ohiocowboy1277
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I've tried straightening many trans pans and within a short amount of time the leak would return due to the deformed bolt holes. Even if you try hammering them out the metal is already stretched and slightly fatigued especially with the thinner cheaper steel on most newer ones so it won't take as much torque to deform it again even if properly tightened. Best bet would be a new pan as already stated
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Unread 04-18-2015, 12:37 PM   #4
Drednot
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PML makes a heavy duty cast aluminum replacement. It has more capacity and fins to aid cooling, and a drain plug for easier maintenance. It also has a boss to drill and tap for a temperature probe.
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Unread 04-19-2015, 11:50 AM   #5
Ex-Calif
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Quote:
Originally Posted by Drednot View Post
PML makes a heavy duty cast aluminum replacement. It has more capacity and fins to aid cooling, and a drain plug for easier maintenance. It also has a boss to drill and tap for a temperature probe.
That's great info. If only for the drain plug!
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