Transmission Drain Plug Leak - JeepForum.com
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post #1 of 11 Old 06-25-2019, 02:41 PM Thread Starter
PJM86
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Transmission Drain Plug Leak

I have an 86 cj7 with Borg Warner T5. The drain plug is leaking and wondering best solution. Iíve tightened it, still leaks. Wouldnít be a big issue, but it leaks about teaspoon a week or so. It also runs down tranny onto skid plate and makes a mess. Thinking of draining, using some rtv, and then refilling after it sets up. Good idea, or bad? Appreciate the help..

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post #2 of 11 Old 06-25-2019, 06:46 PM
Rsb201
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Teflon tape may seal it off
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post #3 of 11 Old 06-25-2019, 09:46 PM
acgcoug
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I use Permatex Super 300 on the threads of drain/fill plugs. It has other good uses as well. It is non-hardening.

https://www.amazon.com/Permatex-8005.../dp/B000HBI9DM

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post #4 of 11 Old 06-25-2019, 10:24 PM Thread Starter
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I will try both, thanks.
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post #5 of 11 Old 06-26-2019, 04:30 AM
keith460
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The plugs are standard pipe threads so they are tapered. Teflon tape should be all you need.


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post #6 of 11 Old 06-26-2019, 10:11 AM
EricRThompson
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Permatex makes a sealer specifically for transmission fluids. Try this:


https://www.permatex.com/products/ga...-gasket-maker/
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post #7 of 11 Old 06-26-2019, 11:38 AM
rbunch4468
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I know you said transmission plug leak... but... I also battle collection of leaky fluids in the crossmember. I have a 258, which like to leak at the rear of the valve cover. Is it possible that both the valve cover and tranny drain plug leak? Just sayin...
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post #8 of 11 Old 06-26-2019, 11:47 AM
baldfatdad
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I haven't fooled with stick tranny's for years so I could be wrong. Does it have a vent? Check to see if its clogged that could help cause a leak.
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post #9 of 11 Old 06-26-2019, 11:48 AM
tdagner
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Teflon tape or maybe some pipe dope from the local hardware store.
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post #10 of 11 Old 06-26-2019, 07:29 PM Thread Starter
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Appreciate all the help, I drained the transmission this evening, used the Teflon tape (as per Keith and couple of the other forum members), refilled it with penzoil synchromesh, took it for a spin and got it nice and hot, came home parked it for an hour or so and no leaks. Think I fixed it. Thanks for the advice.
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post #11 of 11 Old 06-27-2019, 04:27 AM
keith460
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Quote:
Originally Posted by PJM86 View Post
...refilled it with penzoil synchromesh...

Penzoil Syncromesh, good oil and is what I been using for the last 8 years driving around. Shifts are as smooth as butter.

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