Harrop Eaton Truetrac | Holden Salisbury | 28 Spline

Harrop / Eaton Truetrac helical-gear limited-slip differential for early Holden vehicles with a Salisbury-style housing and 28-spline axles.

The Truetrac uses a torque-biasing helical gear design without clutch packs, providing progressive traction with minimal routine maintenance.

Confirm housing, spline count, axle specification and final-drive setup before ordering. Built by Boost & Tune can supply and complete differential setup and installation.

Product Details

Product: Harrop Eaton Truetrac | Holden Salisbury | 28 Spline
Brand: Harrop
Category: Driveline

This listing covers the product and application named above. Use the product title, part number where shown, and the existing technical information on this page to confirm it matches the required vehicle or engine combination.

Before Ordering

• Confirm the listed application matches the vehicle, engine or component being upgraded.
• Check whether supporting hardware, fabrication, wiring, fluids, gaskets or calibration are required for the installation.
• If the vehicle has non-standard modifications, confirm compatibility before purchase.

Built by Boost & Tune Support

Built by Boost & Tune can assist with application confirmation, installation and supporting driveline setup. Contact us before ordering if you need help confirming suitability or planning the complete upgrade package.

Application Checks

Confirm the exact vehicle or engine application, dimensions, interfaces and any supporting hardware required before ordering. Where the part forms one component of a larger performance system, check compatibility with the surrounding components and planned workshop installation before purchase.

Supplier

Harrop

Vehicle Fitment

• Holden Driveline Salisbury 28Spline

Confirm chassis, engine, drivetrain and production-year compatibility before ordering.