Leaking B&M drain plug(s) - ATF question

[holter95]

Installed 2 plugs last week in my trans pan (1 for drain, 1 ready for an oil temp sensor). One of the two I'm sure I overtightened - I torqued to spec but felt the plastic (nylon?) washer crush before I hit the suggested torque. Both are leaking from the outside threads.

Question: Would RTV have any adverse affect on Mercon ATF (or vice versa) if I used that to better seal up the drain plugs around the washer?

 

[Bill MacLeod]

Had the same problem with my 99 trans pan. So, used red loctight on the under side of the large nut and substituted a 1/2" neoprene metal ring gasket for an engine oil pan bolt. Torqued the h#ll out of it.
The "plastic" gasket compresses too much.

 

[BrooklynBay]

I don't like any of those kits since they always leak. You could solder the nut to the pan, and use a drain plug with a drain plug seal. I have a thread on installing leak proof drain plugs. Check # 75 in my list of useful threads for more information: http://explorerforum.com/forums/showthread.php?t=206353

 

[holter95]

I bought and installed some 1/2" ID drain plug gaskets from O'Reilly's that are metal washers with rubber grommets. No leaks.

The old plastic gaskets were useless. When I removed them, I observed that if they are overtorqued in the least, they will leak (anything more than 10 ft-lbs in my opinion).