[78w72]

Originally Posted by twilightTA

Thanks JL. That’s what I had assumed from the spring rate reduction and increased articulation. I may need to leave things be after all. The PTFB springs do handle pretty great now - just a bit noisy and difficult to keep lubricated.

Can you describe more what you mean by the PTFB springs being "noisy"? I have their full GT kit with the rear leafs & shackles and there is zero noise or squeaking from them.

I recall Dave telling me to use a mix of rubber & poly bushings at the rear shackle, will have to check to be sure which is where but he said use the rubber at the top position or maybe it was the bottom for the springs & definitely to use rubber at the front eyelet location... he explained this was because the springs need to articulate and that poly prevented or limited that. So I have rubber at one position for the shackles & front eyelet.

On another car I used all poly up front & for all positions in the rear, after talking with Dave he suggested I switch the front eyelet to rubber & sent me a pair of rubber bushings to swap out there, I will get some moog rubber for the shackles eventually. But even with full poly on the rear leafs of that car they are silent after 15+ years... but the fronts do squeak a little but cant hear it when driving, just a slight squeak when bouncing the front by hand, a little silicone spray stops that for the most part each season, but eventually for that car thats 99% street driven I will just go back to rubber. The dela lum or delrin bushings look interesting for the car with PTFB suspension though.