Proforged sleeved polygraphite LCA bushings!

I bought a set of the proforged bushings just to see the design. They seem to be well designed, but, if you use the inner sleeve that’s installed there’s no way to lubricate them. So, if you install them as provided and they squeak, you’re pretty much screwed. The inner sleeves are a very tight fit too, so I didn’t attempt to install my set of greasable LCA pins since I wasn’t using the bushings anyway (I switched over to delrin). You’d have to press out the inner sleeves they come with and press in the greaseable pins. I’m sure they’ll just slide when you get going, but like I said my intention wasn’t to use them.

As far as the poly bushings that re-use the outer bushing sleeves in the LCA, the problem isn’t the bushings. It’s the crappy tolerances on the outer sleeves AND the LCA pins. I discovered that when I installed the delrin LCA bushings. The delrin is much harder, so the tolerance to the pin has to be much more exact, even than what is required of the poly bushings. After measuring a handful of LCA pins I have, I found pretty much all of them had significant diameter variance from one another. So, the problem with the poly bushings is that they depend on the OE sleeves and pins, which have crappy tolerances.

The other thing is, I don’t think the proforged bushings will stop the pins from spinning. Once the inner sleeve is pressed onto the pin there’s a good chance the sleeve will spin in the bushing, it’s just the material.

As for the original rubber, give me a break. It was shot within 50k miles. There’s TSB’s. The polyurethane, polygraphite, and delrin will all outlast he original rubber as long as they’re properly installed. And that’s the key, because the tolerances have to be more exact with the harder materials. You actually have to check that during installation, you cant just slap the poly bushings in there loose and expect them to work.