[TR] What's the general life expectancy for rubber bushes for LBCs?

Greg Lemon glemon at neb.rr.com
Mon Apr 6 18:08:21 MDT 2015

I have found that the life of rubber bushings varies greatly depending on application and materials, lower inner suspension bushings on the front suspensions of TRs and Big Healeys, have been known to be doing yeoman's service on the cars from new til now (they are usually rusted on and a pita to replace as well).  The upper inners on the TR4-6 don't seem to last nearly as long.

I have polyurethane on the upper front inners of my TR250, they didn't appear to be wearing out when I took them out for re-lubing this year, after about 4-5 years of use that had gotten very squeaky (but lots of silicone grease and they are very quiet again).

I have heard that polyurethanes can wear out from friction, and they will pivot instead of flexing in many if not most applications, but I haven't experienced it on many of my cars.

Greg Lemon

From: Sujit Roy 
Sent: Monday, April 6, 2015 6:27 PM
To: Triumphs 
Subject: [TR] What's the general life expectancy for rubber bushes for LBCs?

I changed them 14 years bac on my Stag This were the days before I heard about polyurethane.

Are polyurethane bushes really fit and forget?



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