Sway Bar Bushings & Brackets

Why these small parts matter

A sway bar, also called a stabilizer bar, links the left and right sides of the suspension to reduce body roll in corners. The bar twists in its mounts as the body leans, so the bushings and brackets that hold it take constant motion. When a bushing wears out, the bar can shift or clunk over bumps, and handling feels looser than it should.

Bushing materials

Rubber bushings are what most vehicles use from the factory. They are quiet and forgiving, but they can crack or compress with age. Polyurethane bushings are firmer and generally resist wear and some fluids better, which many owners prefer for a more precise feel. The tradeoff is that polyurethane can squeak if it is not lubricated, and a firmer bushing may transmit a little more road noise.

• Rubber: quiet, soft, closest to factory feel.
• Polyurethane: firmer, durable, typically needs the supplied grease.

Sizes and styles

The inside diameter of a bushing must match the bar diameter, so measure the bar with calipers or check the specification for your vehicle. Bushings are available as split, wrap-around styles that go on without removing the bar, and as full round designs. Brackets also differ: some are simple U-shaped straps, while others are cast pieces with end links and mounting studs. Lifted vehicles sometimes use extended brackets or drop mounts that restore the bar's angle.

Key points to compare

• Bar diameter and bushing inside diameter.
• Material and whether grease is included.
• Frame-mount versus axle-mount position.
• Whether hardware, sleeves or brackets are included.

Installation tips

Support the vehicle safely on jack stands, and take pressure off the bar before loosening brackets. Clean the bar where the bushing sits, because rust and dirt can wear a new bushing fast. Apply the lubricant that comes with polyurethane sets, and tighten brackets to the manufacturer's torque specification with the suspension at ride height when possible. If the vehicle is lifted, check that the end links and bar still have adequate clearance.

Fitment

Bushing sizes vary by front and rear position as well as model year, so confirm fitment for your exact vehicle and check the manufacturer's specifications first.

Diagnosing the real problem

A clunk may come from the end links, the bar itself or the bushings, so check each. With the vehicle supported, grab the bar and try to move it in its brackets, then inspect the end link joints for play. Replacing a bushing without checking worn end links can leave the noise in place.

Matching parts and common mistakes

Sway bars on lifted vehicles often need longer end links so that the bar stays near level. A bushing that is too small will bind and too large will rattle, so measure the bar. Do not overtighten brackets in the hope of eliminating a squeak; that can bind the bar and make steering feel notchy. Disconnectable end links are often paired with these parts on vehicles that go off-road, since they let the axle move more freely at low speed.