Vibration

[vicktory1967]

Have similar problem w 73 cuda vibration. smooth until 62 then a steady vibration that gets worse w speed. New tranny, rear gears, posi unit, driveshaft. Wheels balanced. Did not think about pinion angle since did not do anything that would change it.....or at least thats what the restore shop said. Sounds like i may need to do that first before checking axles and going into rear end.

[Dick]

Moved to start a new thread. The one posted in was 12 years old.

[cudabob496]

Originally Posted by vicktory1967

Have similar problem w 73 cuda vibration. smooth until 62 then a steady vibration that gets worse w speed. New tranny, rear gears, posi unit, driveshaft. Wheels balanced. Did not think about pinion angle since did not do anything that would change it.....or at least thats what the restore shop said. Sounds like i may need to do that first before checking axles and going into rear end.

Pinion snubber resting against trunk floor?

[te.ringer]

pull the driveshaft out and check that both u-joints move freely,sometimes they are installed to tight .

[cudabob496]

sounds like out of balance drive shaft. even when balanced, they won't always balance right when installed. I experienced that. Finally got a Dennys drive shaft and now real smooth at high speed.
also, is a wheel out of round?

[vicktory1967]

Thanks. Driveshaft is exactly what was wrong. Found out the the newly built shaft by a local shop was crap. Had another shop check it (they do the nascar shafts) and they built me a new one. Smooth as glass!!!!

[Ray Bell]

I hope the first shop were appraised of the problem...

[vicktory1967]

Plan on letting them know in person in next day or so when I can calm down a little and be professional about it like us Mopar guys are....