Rear End Swap Assistance

[jbmetal]

look people...right now I'm kinda pissed off...before doing the swap, my rear end suspension was working fine and without any noises, well...just the control arm bushings. I did the swap last thursday to a 2002 WS6 rear end with 3.42s. The thing is that everything is on its place, the only thing I did was the swap, control arm bushings replacement using polyurethane bushings, and installed new brake lines for the LS1 brakes as well as the e-brake cables, and after doing all that, suspension noises started. First, I figured out that the outside of the poly bushings didn't had enough lube, so lube them again, but this time with a lot of lube and the typical unlubed poly bushing sound is off, then I noticed that my car didn't had any bump stop rubber left, so... installed them today...and part of those noises were shut off...but still I have some metal part banging with another one, and that noise can be heard thanks to roads vibrations, especially thanks to road bumps... and sometimes, it feels that something is loose where the noise comes from, but I've checked EVERYTHING and all is fine, perfectly bolted. My shocks were working perfectly before the swap too.

The only noise that my car had before the swap was because of the control arm bushings, and because of the bump stops which I didn't had. but I didn't had the noise I 'm hearing. it's like a hard knocking what can be heard.

Can someone help me figure that out, because right now I'm ****ing up my mind, just thinking what can be making that?

[pace2006]

Re: Rear End Swap Assistance

LCA bushings shouldn't be replaced with poly bushings. It's too stiff and will bind, rather than allowing twist. Rather it causes something else to twist, something that isn't supposed to. Poly also has a tendency to squeak and be noisy, especially in cold weather. You'd be better off getting some Moog bushings from O'Reilly or Autozone. They allow the LCAs to twist properly and aren't noisy.

Where is the metal banging noise coming from? Does it sound like it's coming from the rearend or suspension or somewhere else? Also, have you checked the transmission mount lately? Those have a tendency to allow the transmission to jump around when they break and you could be hearing it hitting something.

[jbmetal]

Re: Rear End Swap Assistance

well....the noise can be heard on the back of the car...but only on its left...if it was caused by the poly bushings, it should be heard on both sides, left and right. well..i can tell you that it must be something on the rear suspension, because it can only be heard thanks to the road vibrations, bumps and holes. here we have the worst roads in all US territories!!