Oh, the joys of working on an old vehicle after someone has been there before you 
I have a 1994 Geo Tracker 2dr, 2wd, 1.6 8v, 5-speed which I purchased April 2015. I was just trying to drain and fill the tranny and diff with fresh fluid (GL4 in tranny & GL5 rear end). The fill plugs on both were tight, not unusual after doing some searching. I ordered the proper 10mm square socket and with heat the diff plug came loose.
My problem is the trans fill plug is so buggered from the previous owner(s) that it's stripped. I've seen the pictures of welding a bolt into the plug recess. I know a welder but he is concerned about doing this while the plug is in the transmission. His fear is an arc might cause damage to the transmission gears. Should I weld in place or not?
Thank you,
Bruce
I have a 1994 Geo Tracker 2dr, 2wd, 1.6 8v, 5-speed which I purchased April 2015. I was just trying to drain and fill the tranny and diff with fresh fluid (GL4 in tranny & GL5 rear end). The fill plugs on both were tight, not unusual after doing some searching. I ordered the proper 10mm square socket and with heat the diff plug came loose.
My problem is the trans fill plug is so buggered from the previous owner(s) that it's stripped. I've seen the pictures of welding a bolt into the plug recess. I know a welder but he is concerned about doing this while the plug is in the transmission. His fear is an arc might cause damage to the transmission gears. Should I weld in place or not?
Thank you,
Bruce