C-Bushings for Vehicle

C-bushings are the offset polyurethane bushing sets used to correct the rear differential pinion angle on solid rear axle platforms following a suspension lift. On these platforms, the differential housing interfaces with the axle housing through a C-shaped bore, and the C-bushing installed within this interface controls the rotational position of the differential and pinion shaft relative to the axle. When a suspension lift raises the chassis relative to the axle, the geometry between the driveshaft and the differential pinion changes, introducing a driveshaft angle error that generates vibration, accelerates U-joint wear and creates the characteristic driveline vibration under power that appears after a lift is installed.

A C-bushing set corrects this by rotating the differential within the C-bore to tilt the pinion upward toward the driveshaft, restoring the driveshaft and pinion to the correct operating angles for the lifted ride height. Multiple offset angles address a range of lift heights, with the correct angle selected based on the degree of pinion angle correction required for the specific lift. Sets of four cover the single axle requirement, while sets of fourteen provide shop stock for multiple installations. All products include installation guides and are backed by a limited lifetime warranty.

Why Upgrade Suspension?

A suspension lift that changes the chassis-to-axle relationship on a solid rear axle platform changes the driveshaft operating angle at both the transmission output and the differential pinion simultaneously. If the pinion angle is not corrected to account for the new geometry, the driveshaft operates through an angle that is outside the designed operating range of the U-joints, generating vibration under power that increases with vehicle speed and load and accelerating U-joint and driveshaft wear well beyond its expected service life.

C-bushing correction is the most direct and cost-effective method of addressing pinion angle error on platforms with C-bore differential housings because it corrects the angle at the differential itself without requiring driveshaft modification, transfer case drop kits or other drivetrain alterations. Selecting the correct offset angle for the specific lift height ensures the pinion is tilted to the correct position for smooth, vibration-free driveshaft operation at the new ride height.

C-Bushing Range

The C-bushing range includes:

• C-Bushing Sets, Minor Offset, Set of 4: Four polyurethane C-bushings with a minor offset for minor pinion angle correction.
• C-Bushing Sets, Moderate Offset, Set of 4: Four polyurethane C-bushings with a moderate offset for moderate pinion angle correction.
• C-Bushing Sets, Significant Offset, Set of 4: Four polyurethane C-bushings with a significant offset for significant pinion angle correction.
• C-Bushing Sets, Minor Offset, Bulk Set: Bulk pack of polyurethane C-bushings with a minor offset.
• C-Bushing Sets, Moderate Offset, Bulk Set: Bulk pack of polyurethane C-bushings with a moderate offset for shop stock.
• C-Bushing Sets, Significant Offset, Bulk Set: Bulk pack of polyurethane C-bushings with a significant offset for shop stock.

All sets include an installation guide. All products are backed by a limited lifetime warranty.

Why Purchase C-Bushings?

Driveline vibration after a suspension lift on a solid rear axle platform is one of the most predictable and correctable post-lift symptoms, yet it is also one of the most commonly overlooked during the initial installation. Addressing pinion angle correction at the time of the lift rather than after the vibration has appeared ensures the driveshaft operates within the correct angle range from the first drive, protecting U-joints and the driveshaft from the accelerated wear that incorrect pinion angle produces.

For shops completing suspension lifts on applicable solid rear axle platforms, stocking C-bushings in the correct offset angles for the lift heights most commonly installed eliminates the need to source pinion correction hardware as a separate follow-up order and ensures every lift installation is completed with the driveline correctly set up from the start. Bulk packs provide a cost-effective shop stock option that covers multiple jobs across the available offset angles.

Compatible Vehicles

C-bushings are compatible with a wide range of vehicles, including:

• Applicable 4WD trucks and SUVs with solid rear axle suspension and C-bore differential housings that have been lifted and require pinion angle correction to eliminate driveline vibration and restore correct driveshaft operating angles.
• Solid rear axle RWD platforms on applicable trucks requiring pinion angle correction after a rear suspension lift or modification that has altered the chassis-to-axle geometry.
• Any solid rear axle platform with a C-bore differential housing where the post-lift driveshaft operating angle requires correction and the degree of offset required matches one of the available C-bushing angles.

Installation and Support

C-bushings install within the C-bore of the rear axle differential housing as part of a pinion angle correction service, typically carried out alongside or immediately following a suspension lift installation. The correct offset angle is selected based on the degree of pinion angle correction required for the specific lift height. Installation guides are included with all products. For additional technical assistance, a dedicated support team is available to help confirm the correct offset angle for the specific platform and lift height combination.

Repair and Upgrade

C-bushings are manufactured from high-strength polyurethane engineered to withstand the sustained rotational loads, vibration and environmental exposure that the differential C-bore interface is subject to in everyday and off-road use. Polyurethane maintains the set offset position within the C-bore under sustained driving loads, delivering stable and consistent pinion angle correction throughout the service life of the installation. All products are backed by a limited lifetime warranty.

Who C-Bushings Are For

C-bushings are a practical solution for:

• Professional shops completing suspension lift installations on applicable solid rear axle 4WD and truck platforms who need to correct the rear differential pinion angle at the time of the lift to prevent driveline vibration and U-joint wear from the first drive at the new ride height.
• 4WD owners and experienced DIY users who have lifted their vehicle and are experiencing driveline vibration under power attributable to incorrect pinion angle at the rear differential, requiring the correct offset C-bushing to restore smooth driveshaft operation.
• Shops stocking C-bushings across the available offset angles in bulk packs to cover the full range of lift heights encountered across the solid rear axle platforms most commonly serviced.

The right C-bushing set corrects the rear differential pinion angle to the correct position for the lifted ride height, eliminates post-lift driveline vibration, protects U-joints and the driveshaft from accelerated wear and ensures the drivetrain operates smoothly and correctly from the first mile after the lift is complete.

Shop C-Bushings

Explore the full C-bushings range and find the right offset angle for your lift. With multiple offset C-bushing sets in single axle packs and bulk packs for shop stock across applicable solid rear axle 4WD and truck platforms, you can correct rear differential pinion angle accurately and complete every suspension lift installation with a correctly set up driveline and confidence.