Trailing Arms Options

[LowBridge]

Need some help..

Over the winter my son and I replaced the rear trailing arm bushing with Delrin replacements (left and right), however we did not replace the pivot shafts as they seemed to be ok. Everything seemed fine and come spring time we started driving the car on nice days and did 2 autoX events with our local PCA.

After the second autoX event my son told me the car was making a clunking sound at the right rear and when we looked you can see the bushing slipping on the pivot shafts. At first I thought the outer mounting point had moved allowing a small gap between the inner mounting point but that did not seem to be the case.

When we looked closer what I noticed is with the control arm assembled the pivot shaft is longer than the control arm with both bushings installed, so it seems impossible to "close" this gap that allows the bushing to slide left and right.

With this in mind what have I done incorrectly that is now causing this problem? Reading some other posts it almost seems like I need either a washer or some kind of shim and/or the need to use JB Weld.

Any help or feedback would be fantastic..