Ride and suspension questions

[secondchance]

Originally Posted by HAWAIIZR-1

Guys,

Thanks for all the thoughts and ideas that I will address when I meet up with it next month. I did try to bounce the rear and there is no give (not an inch anyway) so I'll do some checking and as mentioned if I can get it on a lift it would be good too. I will also try to meet up with one of the Z brothers there and do some comparisons. Everything was very tight with the polys for sure and I should have done more checking for binding upon assembly.

Hi, Craig,

Glad to hear all is well.
Jim and I have replaced rear bushings with poly versions. In my case those were four dog bone bushings (trailing arms), struts (the member w/ camber adjustment under the diff) and shock uppers.
Make the long story short, after the work backg off the Jim's lift ramp , as the rear whels hit the draive way we both heard a distint snap one time and figured out it was poly binding unloading as the rear went into compression hitting the driveway.
Then I realized combination of different material (rubber originally) resulted in different pivot location. Factory rubber bushings looked like they were bonded to inside of the barrel and, like one of the post, pivot seemed to be between the bolt and the metal sleeve inside the rubber bushing. For the poly, pivot actually occurs between poly outer and inside barrel of aluminum extrusions. I ended up removing dogbones and structs and re-applying thick layer of sillicone grease (I bought an extra jar of this stuff. What comes in the package just wasn't enough) and reinstalling.
I hope sharing my experience helps.