Poly-U Bushings

**BattleBug** · #1 (**permalink**) 10-23-2006, 07:47 PM

What's different about the P-U bushings sold by IAP, Ctr-Line, P-Tek, etc. I'm looking to replace the (now) mushy, cracked & rotten items under my Spider.
Thanks

**Tifosi** · #2 (**permalink**) 10-23-2006, 10:51 PM

Depending on manufacturer, or in some cases, different colors for the same part from the same manufacturer, you'll probably be looking at 'hardness' as the primary difference(s).

They somehow are measured in units called durometers, (I believe it's simular to how they test steel hardness with the punch and dial thing), with higher numbers being harder/firmer.

Max Banks · #3 (**permalink**) 10-27-2006, 03:29 PM

Don't just go replaceing all rubber bushing for polyurethane ones available. In certian palces, especially boith ends of the trailing arms they cause a nervousness that cannot be over come. They prevent the axle from rotating as it rises. Here you are much better off fitting heavy duty high shore rubber items as they allow the axle to move as it was designed to.