You should not need anything on the threads since the oring should be sealing the drain plug against the flat surface. If you are draining the gear lube in order to change out the oring, take the plug over to the auto parts store and get a fatter oring (might want to buy some extras for next time!) that fits the oil plug. Snug it up handy, and then a wee bit more.
Well, Chopper says to use some teflon paste, so try that. I would get some new oring also.
TQ
Recently, changed the trans oil and replaced the small O-Ring on the plug and it leaks. Removed the plug, placed a new O-Ring same deal. What's up never had this problem before. Noticed some white thread locker on the bolt is that my problem?
thanks Jack and Chopper for the teflon advise. ya see, my transmission plug is leaking also -- not a lot - just a few drops a month or so - but is dripping even with new oring. so is my primary case drain plug. I did NOT go back in the primary with teflon tape - it drips a tiny bit too. Just wait till next time and see what all I put on those threads!!!!!!Try some brush on teflon on the threads