aniel_

how do you identify a bad or failing driveshaft?

Vroomaster

It's jerky when applying clutch

Turbonut

iTrader: (1)

There are various types of driveshaft problems. One condition is worn joints to the extent that there is play when moving the driveshaft back and forth. There is also a condition where the joint has no play, but if you change the angle ever so slightly it will bind. The latter is noticeable when riding down a road that causes the suspension to expand and contract, you'll hear a muffled "rubbing" noise.