i have to deal with stripped plugs on transmissions all the time, and had to deal with both a stripped drain and fill plug on my cobalt after the previous owner stripped them. what i like to do with allen heads that are stripped is first try hammering a socket just larger, sometimes you get lucky finding something close going from metric to standard. if that doesnt work, try a torx socket. failing that, i break out my big chisel and 20oz hammer. what i do is on one side of the plug ill drive the chisel straight in till it makes an indent, then drive it at roughly a 45 degree angle in the direction to loosen it. the sharp blow will drive the chisel in and should help turn the bolt. i do this all the time and generally have great success.

fyi- if you buy new plugs from gm, only ask for the fill plug, or if you need both, get 2 fill plugs. they are different part numbers, the difference is the drain plug has an added magnet that comes out of the plug easily. the fill plug is $6, the drain plug is $35.

 

My fault. I was mistaken about the impact driver. If you've done this on a f23 drain plug than i would appreciate a picture since I don't see how it could be done. I don't pretend to be an expert so I'm not doubting it can be done I just don't see how.

 

I referred to an F35. I will check the F23 I have one of those trans in my eco cavvy wntr btr... let u know

 

Does anyone know what the part number is to the f35 transmission fill plug and drain plug?

 

Sorry to resurrect the thread, but I'm also interested in the part numbers for the plugs