load knocking sound when reversing while applying the brakes

[k1ng87]

I attached a couple video links to my google drive of what I hear...one I took a a few days ago during the day (you can hear the loud knocking sound at about 2-3secs) and another one I took last night that you can hear a few times when I'm reversing.

I've noticed that this mainly happens when I'm applying the brake when going in reverse, but I do hear it sometimes when I'm going forward. This doesn't seem to happen when I'm driving and braking though.

Any ideas on what it may be?

I had a frame job done (had to get a new frame put on) a few months ago and thats when this started happening.

video 1: https://drive.google.com/file/d/0B4J2sztCeoJ_TWZKMmtpUm9jZm8/view?usp=sharing

video 2: https://drive.google.com/file/d/0B4J2sztCeoJ_TU92QTZlTmlPdFk/view?usp=sharing

 

[RamCares]

Have you already brought this to your dealership's (or body shop's) attention? If this is of concern, I would recommend obtaining an official diagnosis from your local servicing dealership. Please let me know if you would like assistance in scheduling an appointment. I'd be happy to help.

 

[Stlram21]

Had what sounds like the same noise after I installed my 6" lift. Check all the bolts in the rear of the truck that attach to the 4 link suspension and other suspension components. I had a couple bolts that had loosened up enough that I could grab the lower bar that attaches next to the rear shock and wiggle it making what is a popping noise right after take off and coming to a stop when the rear axle flexes. I can't remember what the nut size is but I used a 1/2" breaker bar to tighten them up. Haven't had the noise since but I also went out and bought some high strength thread locker in case it happens again.

 

[Jdperry]

Had what sounds like the same noise after I installed my 6" lift. Check all the bolts in the rear of the truck that attach to the 4 link suspension and other suspension components. I had a couple bolts that had loosened up enough that I could grab the lower bar that attaches next to the rear shock and wiggle it making what is a popping noise right after take off and coming to a stop when the rear axle flexes. I can't remember what the nut size is but I used a 1/2" breaker bar to tighten them up. Haven't had the noise since but I also went out and bought some high strength thread locker in case it happens again.

I've had the same issue as stated above.