Harrop Detroit Truetrac M80 28 Spline - 63-912A642

Detroit Truetrac M80 28 Spline LSD Upgrade your factory Borg Warner M80 differential with the proven Eaton Detroit Truetrac 28 Spline Limited Slip Differential. The Truetrac uses a helical gear design to automatically transfer torque to the wheel with the greatest available traction, providing a significant improvement in grip without the harsh engagement characteristics of a traditional locking differential. With no clutch packs or friction plates to wear out, the Truetrac is an excellent upgrade for street, performance and motorsport applications where smooth, predictable operation and improved traction are required. Features Eaton Detroit Truetrac limited-slip differential Suits Borg Warner M80 differential 28 spline configuration Helical gear LSD design Smooth and progressive torque transfer No clutch packs or friction plates Quiet operation during normal driving Excellent street and performance upgrade Improved traction under acceleration Suitable for naturally aspirated and modified vehicles Vehicle Applications Suitable for selected vehicles equipped with the Borg Warner M80 28 spline differential, including: Holden Commodore VT Holden Commodore VX Holden Commodore VY Holden Commodore VZ HSV variants using the applicable M80 differential Ford Falcon BA 6 Cylinder Non-Turbo IRS Ford Falcon BF 6 Cylinder Non-Turbo IRS Ford Falcon FG 6 Cylinder Non-Turbo IRS Fitment should always be confirmed against the existing differential before ordering. Available Options Truetrac Centre Only Includes the Eaton Detroit Truetrac M80 28 spline differential centre. Harrop Part Number: 63-912A642 Ideal where the existing differential bearings, seals and related components are being reused or sourced separately. Truetrac + Differential Rebuild Kit Includes: Eaton Detroit Truetrac M80 28 spline differential centre Harrop M80 Differential Rebuild Kit The rebuild kit is designed for Borg Warner M80 rear differentials and typically includes the bearings, spacers, gaskets, seals and pinion hardware required when rebuilding and installing the differential centre. Truetrac Part Number: 63-912A642 Rebuild Kit Part Number: 63-DK-BWA2005 For vehicles with higher kilometres, unknown differential history or where the differential is already being removed and disassembled, we recommend selecting the rebuild kit option and refreshing the associated wear components at the same time. Why Upgrade to a Truetrac? A conventional open differential can send power to the wheel with the least traction, making it easy to spin a single tyre under hard acceleration. The Truetrac's helical gear system continuously responds to available traction and biases torque across the axle, helping both rear tyres contribute more effectively. The result is improved: Launch traction Corner exit grip Wet-weather performance High-power street drivability Predictability compared with aggressive locking differentials It provides the additional traction expected from a performance LSD while retaining smooth behaviour during everyday driving. Professional Installation Recommended Differential installation requires correct bearing preload, backlash and gear contact pattern adjustment. Empire Performance recommends installation by an experienced differential specialist or performance workshop to ensure correct operation and service life.