At this age and miieage, it is probable that the transmission has been repaired at some time. The possibility exists that the wrong bolts have been installed. I would suggest that you order new bolts from the dealer and install them with thread locking compound.
Driveshaft vibrations will damage bushings and seals before they will loosen the mounting bolts. However, driveshaft vibrations are usually a sign of bad universal joints or an out of balance condition - either of which can be destructive. This should be repaired ASAP.
Sunday, April 19th, 2009 AT 9:38 AM