Superpro Rear Upper Forward Differential Pinion Mount Bushing Set

2013–2024 Subaru BRZ / 2017–2020 Toyota 86 / 2022–2023 Toyota GR86

SPF4110-90K

Overview:

The Superpro Rear Upper Forward Differential Pinion Mount Bushing Set is a direct replacement upgrade for the OEM forward differential mount bushings, commonly known as the pinion mount bushings, on Subaru BRZ, Toyota 86, and Toyota GR86 models. Designed for enthusiasts and daily drivers alike, this kit addresses the common issue of premature wear found in the factory soft rubber bushings. Over time, the OEM bushings degrade, leading to increased differential movement, which negatively impacts vehicle responsiveness, handling precision, and overall driving feel.

By installing these Superpro bushings, you restore and enhance the differential’s stability under load, resulting in sharper throttle response, improved rear-end control, and reduced unwanted noise and vibration. This upgrade maintains the factory levels of comfort and NVH (noise, vibration, and harshness) isolation, ensuring your driving experience remains refined while delivering superior performance and durability.

Key Features:

Superpro’s Rear Upper Forward Differential Pinion Mount Bushing Set offers a range of benefits engineered to improve your vehicle’s drivetrain dynamics:

• Direct-fit replacement for Subaru BRZ (2013–2024), Toyota 86 (2017–2020), and Toyota GR86 (2022–2023)
• Constructed from high-performance polyurethane for enhanced durability and longevity
• Reduces differential movement under acceleration and deceleration, improving throttle response
• Maintains OEM levels of noise, vibration, and harshness isolation for cabin comfort
• Prevents the sloppiness and delayed responsiveness caused by worn factory rubber bushings
• Resists degradation from heat, oil, and environmental exposure better than natural rubber
• Improves rear drivetrain stability for more precise handling and traction
• Extends service life significantly compared to OEM components

Construction & Design:

Superpro utilizes advanced polyurethane compounds engineered to withstand the demanding conditions faced by differential mount bushings. Unlike the soft rubber used in OEM parts, these bushings resist compression set, cracking, and deterioration caused by heat and contaminants. The material’s inherent stiffness provides consistent support to the differential assembly, ensuring it remains accurately positioned through varying loads and driving conditions.

The design maintains the original mounting geometry and dimensions, allowing for a straightforward installation without the need for modifications. This precision engineering ensures that the upgraded bushings deliver improved performance without compromising ride quality or introducing unwanted noise.

Installation & Fitment:

Installation of the Superpro Rear Upper Forward Differential Pinion Mount Bushing Set is a direct bolt-in process that requires no special tools or modifications. The kit is specifically designed to fit the rear upper forward differential mount on Subaru BRZ models from 2013 through 2024, Toyota 86 models from 2017 to 2020, and Toyota GR86 models from 2022 to 2023. Professional installation is recommended to ensure proper torque settings and alignment, but experienced enthusiasts with basic mechanical skills can perform the upgrade in a home garage.

What's Included:

• Set of polyurethane rear upper forward differential pinion mount bushings
• Installation instructions

Ideal For:

This bushing set is ideal for Subaru BRZ, Toyota 86, and Toyota GR86 owners seeking to restore or enhance their vehicle’s drivetrain precision and responsiveness. It is especially beneficial for drivers who frequently push their cars in spirited driving, track days, or performance applications where the factory rubber bushings wear prematurely. Daily drivers will also appreciate the improved durability and maintained comfort levels.