The 2 bolts that hold the exhaust bacrket and go through to the trans came loose and caused an oil leak. I first noticed the leak by smell and finally followed the smoke. There are other threads about this problem. I was able to tighten them with a 1/4 inch bit extension and a long 1/4 inch box wrench from Sears. My question is, if the bolts come loose again, can I take them out to apply thread lock without losing my tranny fluid, or should I drain the tranny first?