ok i was sitting in trafic this morning and i took my foot off the break and the car rolled fwd nice and smooth then i stepped back n the break and she stopped fine only 2 sec. later i get a slam slam and it felt like everything from my seat back had just caught up with the rest of the car and i sometimes get this same slamming when pulling out of a stop

any ideas????

 

You still have a back bumper n tail lights right??

Could be drive shaft and u-joints???

I have this happen on my dodge once n a while. I think it might be dirty injectors

 

Loose or worn Sway bar and Panhard rod bushings do that. Along with Torque Arm bolts being loose. I have the weird slamming sound too. I got under there and found that the torque arm bolts were loose, so i tightened them down, and it got a little better. I replaced the bushings in the back, and it totally went away. Get the poly bushings, they wear better than the rubber ones, and give you better handling.

 

it's more the just the slaming sound the it feels almost like someones rear ended ya.... i just put on a es kit not too long ago but it did not help any it's just weird!

 

What kind of ES kit was it? Did you check the bolts a few days after driving to make sure they didn't loosen? Lost my panhard rod's bolt that way after the 3.73/posi/disc swap.. luckily it dropped right outside my house. I was wondering what the bang bang bang noise was- turned out the bolt dropped, allowing the whole back of the car to swing left-to-right as it wanted. When this happened, the driveshaft's u-joint bolts smacked into my exhaust's intermediate pipe. I was surprised at the size of the dent; no damage to the ujoint or bolts, and luckily it didn't rip right thru the pipe. Good thing I was only backing into my driveway!