1badavalanche

question guys. my 08 avalanche with a 3/5 drop and a spohn adjustable panhard bar. at a stop, light turns green, i punch the gas and theres a thug from my rear suspension. what could that be? i was thinking my upper and lower control arms bushings in the rear is bad. i jus ordered the spohn uppers and lower arms. anything else i should check?

cttandy

iTrader: (12)

What drop kit did you use? Any pics of the current setup?

Gbody6liter

Hitting the bumpstops maybe?

1badavalanche

I used a McGaughy's drop kit. It jus started happening The last couple of months.

CHarris

iTrader: (5)

Hmmm... I wandered in here looking for trouble... where are the "thugs" at?


Sorry... couldn't resist!

cttandy

iTrader: (12)

Can you post up some pics? We might be able to give you an idea of what to look for if we see it.

Gadgetized

iTrader: (9)

Does it happen if you hold your foot on the brake so the truck isn't rolling? I would CAREFULLY have a friend watch from out from under the tires and see if he can see/hear what's happening. Or you could always have a mother in law look from under the truck...

1badavalanche

Great tips guys... And I'll try to download some pictures.

escoalvarez

Mine was doing the same thing for awhile until i figured out what it was. The frame mounted bracket hole was elongated (stretched side to side) and it allowed the lower control arm to move and create a metal to metal sound. I removed the lower control arm and stuck the bolt through the hole of the bracket to see where the metal was out of circle. I then welded metal to the bracket hole and filed/drilled down the excess weld to reform it into a circle again. After that i never had a problem and it's been 3 yrs. Hope that helps.