mrc 952 #1 Posted Monday at 06:12 PM hello all, servicing my late buddies wh tractor for his widow. the tranny drain plug would not budge. i tried welding a nut onto the drain plug, no luck with that idea. next i drilled thru the drain plug with my Milwaukee hole hawg drill. i kept going up in size till i could just see some tranny case threads. next i tried an easy out from my matco extractor kit. no luck there either. tomorrow i'm thinking VERY carefully with a dremel remove some more material from the remnants of the drain plug. then tap with a NPT tap. question is what size NPT tap? i'm thinking 1/4x18 NPT tap? then get a new drain plug from the local parts store. any suggestions welcome regards mike Share this post Link to post Share on other sites
ri702bill 9,411 #2 Posted Monday at 06:54 PM (edited) Mike - sometimes this works.... use a left-handed drill bit the size of the tap drill. The reverse rotation & thin wall just might do it. But it has to be dead on center..... If it is a 1/4 NPT thread, the tap drill is 7/16" Edited Monday at 06:55 PM by ri702bill 1 Share this post Link to post Share on other sites
mrc 952 #3 Posted Monday at 10:21 PM thank you bill for the idea. unfortunately i must be a bit off center because i can see some tranny case threads on one side of the hole. the other side still has remnants of the the drain plug. Share this post Link to post Share on other sites
mrc 952 #4 Posted 19 hours ago bill, the drain plugs are 1/8x27 NPT size. luckily i had a tap that size. closer inspection revealed i was pretty well centered when drilling. the threads in the tranny case had a couple of flute marks from the drill bit but, none too deep. i tapped the hole. installed a new drain plug with some pipe dope on it and no leaks. after that i finished changing the tranny oil and filter. dodged a bullet on this one for sure. regards mike 2 Share this post Link to post Share on other sites
