Odd resonance from rear on certain bumps

RJV

RJV

Caught the Bug
I've had my Dynatrac Endurosport lift for a month now and put about 800 miles on it - absolutely love it. However, I've noticed that when both rear tires hit a joint on a bridge, I get this weird resonance/rattle/soft thud that goes through the whole Jeep. I've retorqued everything several times (I loosed all the control arm bolts and retorqued on the ground). I noticed my spare tire was loose so I tightened that back up. It doesn't happen doing anything else, like going over curbs or pulling into driveways, or just hitting bumps in the road. It doesn't sound like a normal suspension clunk like a loose control arm or anything, not metal on metal either. Same tires since I lifted it, and never noticed it before. Any ideas? Thanks!
 
RJV said:
I've had my Dynatrac Endurosport lift for a month now and put about 800 miles on it - absolutely love it. However, I've noticed that when both rear tires hit a joint on a bridge, I get this weird resonance/rattle/soft thud that goes through the whole Jeep. I've retorqued everything several times (I loosed all the control arm bolts and retorqued on the ground). I noticed my spare tire was loose so I tightened that back up. It doesn't happen doing anything else, like going over curbs or pulling into driveways, or just hitting bumps in the road. It doesn't sound like a normal suspension clunk like a loose control arm or anything, not metal on metal either. Same tires since I lifted it, and never noticed it before. Any ideas? Thanks!
Click to expand...
Describing a “rattle” and “thud” means it could be anything to be honest. With it happening only on a “joint on a bridge” and not a normal bump makes me have to ask…are you sure it wasn’t just the bridge making the noise?
 
Disciple Off Road said:
Describing a “rattle” and “thud” means it could be anything to be honest. With it happening only on a “joint on a bridge” and not a normal bump makes me have to ask…are you sure it wasn’t just the bridge making the noise?
Click to expand...
Pretty sure - done it on a few different bridges and never did it stock. It's like a rattle/vibration that starts with a thud and then resonates throughout the body.
 
RJV said:
Pretty sure - done it on a few different bridges and never did it stock. It's like a rattle/vibration that starts with a thud and then resonates throughout the body.
Click to expand...
Do you have anything in the back tub?

Also, if you added rock sliders or steps, check the rear body bolts and see if they’re making contact. The body can flex and if there’s not enough clearance you’ll get a thud heard through the jeep.
 
Check your tire pressure but ALSO check to see if your rear adjustable sway bar links are properly adjusted and not hitting something.
 
You must log in or register to reply here.
Top Bottom