I wanted to loosen the bolts on my 2006 Jeep TJ transmission mount plate, but I find these bolts are really tight, afraid I'll bust them if I use too much force. The Jeep is a new Mexico jeep and I have no signs of any frame rust anywhere. Very clean inside and out. Any advise how to get these bolts loose? Maybe soak with WD 40 for a few days since they have been in for 13 years as far as I know?