A bad u-joint or dented driveshaft can cause severe driveline vibrations resulting in a crack in your transmission housing. That problem is solved with Sinister?s Rear Housing Support for 4×4 trucks. The Sinister housing is made in America using 7/8 .120 wall DOM mild steel tubing giving you the strength and reliability you need. The Sinister Rear Housing Support installs easily in your driveway or garage using factory bolts. In addition, it is backed by Sinister’s Lifetime warranty. Get yours now.