Whiteline | Differential Bushing Insert Kit | GT/GR 86 & BRZ I & II

The Whiteline Differential Mount Bushing Kit reduces rear axle differential movement under load and specifically stabilises the factory differential bearings with precisely fitting PU inserts. The inserts are installed into the cavities of the original bearings, significantly reducing differential twist during load changes, gear shifts, and abrupt throttle commands.

Especially with the second-generation GR86 and BRZ, many drivers report a noticeably more direct power transmission in the drivetrain. The sometimes factory-standard knocking or yielding of the differential during load changes is significantly reduced, making the vehicle feel more controlled and precise, particularly during sporty driving. Throttle response feels more direct, gear shifts are cleaner, and the rear axle provides more feedback overall.

The kit is also a sensible addition for the first-generation GT86 and BRZ. As the vehicle ages, the original rubber mounts lose stiffness and can allow additional movement in the drivetrain. The Whiteline inserts support the existing mounts, reduce unwanted movement, and help restore or even improve the original driving feel.

The kit consists of high-quality polyurethane inserts and is supplied as a complete set. Installation does not require replacing the original differential mounts and can be integrated directly into the existing mounts. This keeps the effort manageable, while the improvement in driving behavior is immediately noticeable.

Advantages at a glance:

• Significantly more direct response from the drivetrain
• Reduction of knocking and play during load changes
• Stabilization of the standard differential mounts
• Noticeably more precise power transmission to the rear axle
• Especially recommended for GR86 and BRZ Gen2
• Sensible support for aged standard mounts in Gen1
• Easy retrofitting without replacing the original mounts

For those who want to give their GT86, GR86 or BRZ more precision in the drivetrain, the Whiteline KDT925 offers a relatively simple but very effective modification. Especially in combination with further chassis and drivetrain upgrades, the kit provides a significantly tighter and more direct driving feel.

Installation time is approximately 1.5 hours, a lift is recommended. You can find the instructions here.