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Transmission oil pan leaking slightly

o1gnah

Well-Known Member
Local time
5:16 PM
Joined
Sep 19, 2023
Messages
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Location
Maryland
I noticed my transmission oil pan has a little oil around the outer edge and a few of the bolds are shining with lite oil. The car does not run and there is little oil in the transmission as this is a project car and just installed the transmission and torqued the cover bolts. Slight gasket visible between the pan and transmission which I think is normal just not the small oil leaking. Causes? How concerned should I be?
 
I have decided to replace the shift shaft seal. In researching I read their is another seal inside the shift shaft held by a c clip. I believed my leak was from the outer but am not concerned if I just replace that it may still leak. But don’t want to just keep taking more and more apart. Thoughts on culprit?

I bought the tool from Amazon to remove outer seal but I didn’t go well. I don’t plan on removing transmission so all is done under car. I’ll try a small cotter pin extractor soon on outer seal. Do you guys think I need to or should replace inner seal under c clip? Would be very difficult under car but maybe necessary.

Fluid photos are my transmission. The ones with copyright are for reference

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On the main trans housing they can leak from the pan gasket, selector shaft seal as above, the filler tube O-ring, and the rear band pivot O-ring(s) at the back of the case.
Be careful with the oil pan bolts, seems they get stripped out often, not sure if from cross-threading or over-tightening them?
I just heli-coiled a trans pan hole yesterday on my 48RE transmission where I cross-threaded a pan bolt last time I had the pan off.
Used the "Big Gator Tools STD1000DGNP Standard Drill Guide Sizes 1/8" - 3/8"" I got off Amazon to help square up the drill bit trying to drill the hole for the heli-coil from under the truck.
The hard plastic pan gasket works good and can usually be re-used.
Mopar also makes an ATF RTV that they use to glue the transmission pans on some of the FWD cars, and that RTV will seal just about anything.
 
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