Differential Bushings with Fitting Position Front, Rear for 2011 Subaru Impreza WRX STI Limited

Subaru Impreza Differential bushings are the platform-specific polyurethane bushing kits used to replace worn or deteriorated rubber components at the front and rear differential mount positions. The differential housing is secured to the chassis, subframe or cradle through a system of mount bushings at the front and rear mount positions, and on applicable platforms, through a moustache bar or carrier crossmember that provides additional lateral and longitudinal location. Together these bushings control how the differential is located under the torque reversals, acceleration loads and road shock that the driveline transmits through the mount positions continuously during use.

As differential mount bushings wear, the differential housing begins to shift under load, introducing drivetrain clunk under acceleration and deceleration, driveline shudder, axle hop under power and the progressive looseness at the differential mount interface that transmits NVH into the chassis and accelerates wear at adjacent driveline components. The differential bushings range covers differential carrier mount sets, rear differential to subframe mount kits, rear differential mount bushing sets, center support bushings, moustache bar bushing sets, motorsport specification mount bushings, standard mount bushings, front mount bushings in multiple tube lengths, rear differential rear bushing kits, pinion mount grommets, differential mount in cradle bushings in multiple tube lengths, front and rear insert bushings, front differential mount bushings for 4WD platforms, positive power kits, and combined rear differential and moustache bar bushing sets. All products are backed by a limited lifetime warranty.

Why Upgrade Subaru Impreza Suspension?

Differential mount bushings on RWD and AWD performance, truck and off-road platforms are subject to the full torque output of the engine at every acceleration event, and the abrupt torque reversal at every lift-off and braking input. Factory rubber mount bushings that have softened or cracked beyond their designed compliance range allow the differential to rock at the mount positions under each load reversal, producing the characteristic clunk and shudder that is one of the most recognizable symptoms of worn differential mounts. On platforms used for towing, off-road driving or performance use, this deterioration is significantly accelerated by the elevated and more frequent load cycling that these applications demand.

Renewing Subaru Impreza differential mount bushings with correctly specified polyurethane alternatives restores correct differential location under all load conditions, eliminating mount movement and the clunk, shudder and NVH it produces. For performance and motorsport applications, higher specification mount bushings reduce differential movement more aggressively, delivering more direct and immediate torque transmission with less drivetrain compliance at the mount interface.

Subaru Impreza Differential Bushing Range

The Subaru Impreza differential bushing range includes:

• Subaru Impreza Differential Carrier Mount Sets: Complete carrier mount bushing sets for the differential carrier mounting positions on applicable RWD passenger and performance platforms, renewing all carrier mount positions in a single purchase.
• Subaru Impreza Rear Differential to Subframe Mount Kits: Full replacement bushing kits for the rear differential to subframe mount interface, addressing all mount positions between the differential and the rear subframe.
• Subaru Impreza Rear Differential Mount Bushing Sets: Platform-specific bushing sets for the rear differential chassis mount positions on applicable truck and Applicable performance platforms.
• Subaru Impreza Differential Center Support Bushings: Individual bushing kits for the differential center support mount position on applicable platforms.
• Subaru Impreza Differential Carrier Moustache Bar Bushing Sets: Bushing kits for the differential carrier moustache bar mount positions on applicable RWD platforms where the moustache bar provides lateral and longitudinal differential location.
• Subaru Impreza Differential Mount Bushing, Motorsport: High specification motorsport variant mount bushing kits for applicable performance platforms where elevated mount stiffness is required for track and performance driving.
• Subaru Impreza Standard Differential Mount Bushings: Platform-specific standard replacement differential mount bushings for applicable platforms at front and rear mount positions.
• Subaru Impreza Differential Front Mount Bushings: Individual bushing kits for the front differential mount position, available in dimensionally specified tube lengths for applicable platforms where the front mount bushing tube length differs between variants.
• Subaru Impreza Differential Mount In Cradle Bushings: Bushing kits for the differential mount in cradle position on applicable platforms, available in multiple dimensionally specified tube lengths to match the cradle mount configuration of the specific application.
• Subaru Impreza Differential Mount Insert Bushings: Front and rear polyurethane insert bushing kits that install into the existing mount shell on applicable platforms without requiring full mount housing removal.
• Subaru Impreza Front Differential Mount Bushings, 4WD: Bushing kits for the front differential mount positions on applicable 4WD platforms where the front differential requires mount bushing renewal at the chassis interface.
• Subaru Impreza Differential Positive Power Kits: Combined front differential mount bushing kits for applicable platforms requiring renewed compliance and improved differential location at the front mount positions under power.
• Subaru Impreza Rear Differential Forward Mounting Bracket Bushing Sets: Bushing sets for the rear differential forward mounting bracket position on applicable platforms.
• Subaru Impreza Differential Pinion Mount Grommets: Replacement polyurethane grommets for the differential pinion mount position on applicable platforms.
• Subaru Impreza Combined Rear Differential and Moustache Bar Bushing Sets: Combined bushing sets renewing both the rear differential mount and moustache bar positions in a single purchase on applicable RWD platforms.

Why Purchase Subaru Impreza Differential Bushings?

Differential mount bushing wear is the most direct cause of the drivetrain clunk and shudder that develops on RWD and AWD vehicles as mileage accumulates, and it is a fault that cannot be resolved through driveshaft, axle or U-joint inspection if the mount compliance itself remains uncorrected. Renewing the Subaru Impreza mount bushings restores correct differential location under torque load, eliminates the movement that produces clunk and shudder, and returns the driveline to the correct compliance baseline from which U-joints, axles and the driveshaft all operate as designed.

For performance and motorsport applications, higher specification bushing variants reduce differential housing movement under hard acceleration and braking more aggressively than standard replacement items, delivering the tighter, more direct drivetrain feel that track and performance driving demands without the excessive NVH that solid mounts introduce.

Installation and Support

Subaru Impreza Differential bushing kits are designed for installation at the front and rear differential mount, carrier, cradle and moustache bar positions on applicable platforms. Installation times range from under an hour for simple grommet and insert renewals to four hours for full rear differential to subframe mount kit installations. Installation guides are available across most products. For additional technical assistance, a dedicated support team is available to confirm correct product selection, tube length specification and fitment for the specific platform and differential mount configuration.

Repair and Upgrade

Subaru Impreza Differential bushings are manufactured from high-strength polyurethane engineered to withstand the sustained torque loads, vibration and environmental exposure that differential mount positions are subject to in everyday, performance, towing and off-road use. Motorsport specification variants are manufactured to a higher stiffness profile for applications requiring maximum differential location under extreme torque and load cycling. Insert-style products install into the existing mount shell without requiring housing removal, reducing installation complexity on applicable platforms. All products are backed by a limited lifetime warranty.

Who Subaru Impreza Differential Bushings Are For

Subaru Impreza Differential bushings are a practical solution for:

• Professional shops completing drivetrain servicing and rear suspension overhauls on applicable RWD, 4WD and AWD platforms requiring correct differential mount bushing renewal to eliminate drivetrain clunk, reduce NVH and restore correct differential location under all load conditions.
• Performance and enthusiast vehicle owners renewing differential mount bushings on applicable RWD and AWD platforms to eliminate drivetrain shudder, improve acceleration stability and reduce mount-induced clunk on street and track applications.
• Motorsport and track drivers requiring higher specification differential mount bushings on applicable performance platforms to minimize differential housing movement and deliver the tightest possible drivetrain response under hard acceleration and braking.
• 4WD and truck owners renewing front or rear differential mount bushings to restore correct driveline compliance and eliminate mount-induced NVH under sustained towing, loading and off-road use.

The right differential bushing kit restores correct differential location under every torque and load condition, eliminates mount-induced drivetrain clunk and shudder, and delivers a more direct, stable and controlled driveline feel from every throttle and braking input.

Shop Subaru Impreza Differential Bushings

Explore the full Subaru Impreza differential bushings range and find the right kit for your vehicle. With differential carrier mount sets, rear differential to subframe mount kits, rear and front differential mount bushing sets, center support bushings, moustache bar bushing sets, motorsport specification mount bushings, mount in cradle bushings in multiple tube lengths, insert bushing kits, front differential mount bushings for 4WD platforms, positive power kits, pinion mount grommets and combined differential and moustache bar bushing sets across applicable passenger, performance and AWD platforms, you can restore correct differential location and complete every drivetrain mount service with confidence.