Trailing Arm Bushings, What material to select? |
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Trailing Arm Bushings, What material to select? |
malcolm2 |
Aug 28 2014, 03:32 PM
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#1
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Advanced Member Group: Members Posts: 2,745 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States |
I need to replace the rear wheel bearings, so "while I am in there" I will also tackle the bushings.
Rubber looks to be the OEM choice but is hard to find with the exception of the elephant racing kit that includes the shafts and install tools. $300+ I used the Elephant bushings on the front. I found poly-graphite to be the least expensive < $20 for a set of 4 bushings only With Delrin as the middle of the road choice. @ $50 for a set of 4 bushings only So what is the +/- of each material? Can you throw a few vendors out there? My car is a daily driver? Clark |
ChrisFoley |
Sep 18 2014, 11:31 AM
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#2
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I am Tangerine Racing Group: Members Posts: 7,925 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None |
The fronts are very different than the rear with regard to the assembly and the forces involved.
The a-arm (both F&R) brackets are retained by bolts. The bushing flanges and the flanges on the a-arm prevent fore-aft movement which has only a small force component. The ends of the trailing arm assembly have to resist all the sideways forces from cornering, but the flanges aren't flat enough to support a proper thrust washer. Not only that, the thickness of the thrust washers/bearings must add exactly the correct amount so the trailing arm pivots freely without sideways free play. I've measured a significant length variation among a large collection of stock pivot shafts. Since the steel sleeve has to be slid all the way through the trailing arm to install it, using any kind of liquid "glue" is questionable IMO. |
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