1slow67

The Polyurethane bushings are fine as long as you grease them up, if you don't then they will squeak.

Jonk67

They only gave me tiny tubes of grease with my poly bushings, I figured out that dielectric grease was the same compound from all I could tell by research, feel, smell, consistency. I bought a toothpaste size tube at the part store for <$10. I didn't have squeek for the year I drove my car pre teardown for drivetrain rebuild. I lubed the bushings liberally.
Jon