hi
how would you know if your u joint was bad?
thanks

 

If there is play in it and/or it makes noise.

Also, a symptom of a bad u-joint is certain vibrations in the car at the same speed everytime.

I used to have one that would let me know I reached the speed limit - 65 mph

 

Yeah, what he said. Mine had that 65mph indicator thing going on too. Someone else on another thread asked about getting them rebuild. IF you do, don't do it yourself if you don't have the precision tools. You could throw off the shaft balance. Better to take it to a shop or get a new one. Shop should be $20-$40 bucks, j-yard, maybe a little more. To check it, hold one end and shake the other. U joint should not move what so ever. If it flinches, its bad