One of the best solutions is to use an aluminum bushing with a thermoplastic liner made from polyoxymethylene. Some drag race-only bushings have no means to grease or lubricate the bushing. Cars aside, this happens in many applications. Basically, the dissimilar metallic parts are galling. It’s common for a steel bolt or steel sleeve to seize inside an aluminum bushing. Unfortunately, solid aluminum bushings have issues too. The solid bushings work because there’s no deflection. The solid bushings stop the squirm and wasted motion (found with stock rubber bushings) as torque is applied to the rear axle assembly. ![]() In a typical drag race car, it’s not uncommon to replace the rubber bushings with solid aluminum ones in each leaf spring eye. That makes the ride agreeable to many consumers, but it also robs your car of performance because the bushings deflect. The reason rubber bushings were used in the first place was because it made for a good vibration isolator (it’s soft). On a car that could be five or six decades old, the rubber will either be on the verge of disintegration or approaching it. ![]() It’s no secret that rubber bushings deteriorate over time. Stock bushings were always encased in rubber and aren’t particularly heat- or chemical-resistant. In that article, we mentioned there are a few more things you can do to enhance traction. Recently we showed how a set of leaf springs with a forward bias (ala Mopar SS springs) could be used sans any other traction devices.
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