So I installed the XRC rear bumper....now there is awful knocking when i go over bumps in the rear.....apparently its the bumper hitting the body....i cant get it in until Friday to get trimmed up if needed( lol i've taken it off 2 times alone and put it back on.. i'm over it)....so my question is how bad is it to drive with it like that untill i can get it repaired?

 

I'm sure it's fine. Unless it not attached properly theres no way its moving enough to cause any real damage

 

I mean its ON THERE...i can jump on it and it does not move...but hitting bumps i hear a loud knock in the back....

 

Check your rear shock bushings !

 

D-rings?

 

I just had the lift put on 4 days ago buy a really good shop here, and this didnt start till i had put the rear bumper on.....do you really think it could be the rear bushings?

 

Yeah actually I heard a knocking from the rear when mine were shot. See if you can get under there and listen while you have someone jump on the back and move the suspension.

 

What kind of lift is it?

 

BDS 4.5in long arm.....and didn't hear the knocking until i had installed the rear bumper...

 

just walked walked out and looked, they are new bushings...they seem fine.

 

How long have you had the bumper on for? Are you going over the same bumps as before you had it and are just now noticing it? Whats your shackle angle look like?

 

yeah.....i hopping those HUGE road humps and it was like being on a cloud...just looked on driver side....i think this may be it....the bumper is damn near touching my rear leaf....could this be the issue??

 

Well there's your problem...
When the suspension flexes, that shackle swings back.

 

yeah....funny how its always the painfully obvious that you overlook.

 

Look into a boomerang shackle, that might fix it. Or get happy with a grinder and cut away the offending metal from the bumper.