The Stovebolt Site Forums The Shop Area Engine Shop Driveline U Clamp Torque Needed

Hey all, I just got back my driveshaft that has been out getting restored and am ready to put it back in. I am having trouble finding the correct torque specs in the shop manual for the U clamps that attach the driveshaft to the differential (2 U Clamps with 1/2 nuts on ends)and the ones that attach the driveshaft to the manual 4-speed transmission (2 U Clamps with 9/16 nuts on ends). This is for a 1964 Chevy Fleeetside C-10, all original. Also, for the center support of the driveshaft, the manual is a little unlcear to me, is about 150 ft. lbs. for the two bolts about right? Thanks in advance!

That is probley going to be inch pounds not foot pounds. that should be 5/16 bolts. you should be able to tighten them by hand untill you mash the lock washer down and that should do it. don't over tighten them it will damage the u-joint. know from over tighten mine. never have use a torque wrench on mine.

super250six

I don't think you'll get 150 ft. lbs. of torque out of them 3/8 carrier bearing bolts. I would say 30 -35 ft. lbs. would be plenty. When tightening to u-joint u-bolts, you just tighten them as tight as an open end wrench will get them. There's no real way to torque them. Don't tighten one all of the way and then the next, bring them down snug and tighten them a little at a time.
Scott