loud knock when accelerating or after cresting a hill

[jelcojedi]

checked for broken trans mount, and motor mount pray to God it is not the trans. also does not knock whe driving at low speed. Any help>>>>does not knock all the time.

 

[ltd02]

Rear upper control arm (boomerang) has a ball joint on top of the rear diff. Very common clunk when it wears and gets sloppy. Best to replace with a Mopar version. Also check the rear Dshaft ujoints and front Dshaft CVs on both ends. I'd bet on the rear UCA

 

[NewerJeeper]

Rear upper control arm (boomerang) has a ball joint on top of the rear diff. Very common clunk when it wears and gets sloppy. Best to replace with a Mopar version. Also check the rear Dshaft ujoints and front Dshaft CVs on both ends. I'd bet on the rear UCA

Wow, im disappointed there is a balljoint there. How do you know if that ball joint is bad there?

 

[tommudd]

Wow, im disappointed there is a balljoint there. How do you know if that ball joint is bad there?

Disappointed ????
Ok I'll play, why?
But just get under and either roll the KJ back and forth with it in gear and you'll see movement
or
use a pry bar and pry up on the tri-link

 

[ltd02]

If you don't like the tri-link with a ball joint, Tom knows of an alternative. :gr_grin:

Bolt on KJ Tri-Angulated 4 Link