Whiteline Front Gearbox Positive Shift Kit – 2015-2017 Ford Mustand Ecoboost / 2011-2017 Ford Mustang

Whiteline Front Gearbox Positive Shift Kit – 2015-2017 Ford Mustang Ecoboost

Sharpen the Shift Quality on Your S550 Ecoboost
The Whiteline KDT928 Gearbox Positive Shift Kit for the 2015-2017 Ford Mustang Ecoboost fills the void space in the front gearbox mount with a polyurethane insert, reducing transmission movement under gear changes and load transitions. The S550 Mustang’s factory transmission mounts have deliberate compliance for NVH — this kit reduces that compliance for improved shift feel and drivetrain precision.

DETAILS

• Polyurethane insert for front gearbox mount on S550 Ecoboost Mustang
• Reduces transmission movement under gear changes and load transitions
• Improves shift quality precision and drivetrain feel
• Fitment: 2015-2017 Ford Mustang Ecoboost (S550 chassis)
• Insert design — no replacement of OEM housing required

S550 Ecoboost Drivetrain Feel
The 2.3L Ecoboost Mustang is a genuine performance car in current S550 trim — the turbocharged 4-cylinder produces respectable power and the S550 chassis is capable. Firming up the gearbox mount with Whiteline’s insert improves the shift quality feel, making the gearbox feel more direct and connected under spirited driving.

Insert Approach for Simple Installation
The polyurethane insert fills the void in the existing OEM mount housing — no housing removal required. The installation is straightforward: locate the mount, install the insert, reassemble. Significantly simpler than full mount replacement.

S550 Mustang Performance Platform
The S550 Mustang platform supports a wide range of performance development, and drivetrain mounts are part of that picture. The KDT928 is particularly relevant for S550 Ecoboost owners using the car for track days and autocross where shift quality under load is important.

Why Choose Whiteline

Whiteline has been engineering suspension components from their facility in Australia since 1979. Every product in their catalog is developed with a clear goal: measurable improvement in handling, stability, and tyre contact. Whiteline’s polyurethane bushings, sway bars, control arms, and alignment correction kits are engineered using finite element analysis and validated on track before they reach the market. Their components are direct-fit, bolt-on solutions designed for enthusiasts who want real performance gains without fabrication or custom work.

The RallySport Take

An effective, easy-to-install drivetrain feel improvement for the S550 Ecoboost Mustang. The install is straightforward but doing it correctly matters — clean the housing thoroughly before installation and apply grease to all polyurethane-to-metal contact surfaces. The improvement in drivetrain feel shows up immediately on the first hard acceleration run after installation.

What’s in the Box

• Polyurethane insert for front gearbox mount on S550 Ecoboost Mustang
• Reduces transmission movement under gear changes and load transitions
• Improves shift quality precision and drivetrain feel
• Insert design — no replacement of OEM housing required

Fitment