Gearbox Rebuilds

Suffering from crunching gears, whining bearings, or popping out of gear? We offer professional gearbox rebuild services for manuals and selected automatics. From diagnosis and strip-down to precision rebuild, testing, and aftercare—your transmission is restored to smooth, reliable operation.

Book a Rebuild Request a Quote

When to Rebuild

  • Gear crunching or grinding (especially 2nd/3rd)
  • Whining or rumbling that changes with speed or load
  • Popping out of gear under acceleration or on overrun
  • Heavy, notchy, or vague shift feel
  • Oil leaks from driveshaft seals or casings

Diagnosis & Assessment

We start with a full inspection to confirm the fault and scope the work required:

  • Road test and shift quality evaluation
  • Fluid inspection for glitter/debris and contamination
  • Clutch, linkage/cables, and mount checks
  • End-float and bearing noise assessment

Our Rebuild Process

  1. Removal & strip-down: Clean bench teardown with parts tagged and documented.
  2. Inspection & measurement: Gears, hubs, synchros, forks, shafts, and bearings measured to spec.
  3. Parts replacement: Bearings, seals, synchro rings, worn gears/hubs/forks as needed.
  4. Reassembly: Correct clearances, preload and backlash set per manufacturer specification.
  5. Seal & refit: New seals, RTV/gaskets, fresh fluid filled to correct grade and volume.
  6. Testing: Static run-up, road test, and final QC report.

Common Repairs We Perform

  • Bearing and seal kits
  • Synchro ring and hub/slider replacement
  • Selector fork repair/replacement and detent service
  • Input/output shaft repairs and end-case refurbishment
  • Leak fixes: driveshaft and selector shaft seals

Performance & Upgrade Options

  • LSD installation: Helical or plated limited-slip differentials
  • Gear ratio changes: Close-ratio sets and final drive upgrades
  • Reinforced components: Upgraded bearings, forks, and hardware
  • Shifter feel improvements: Bushes, cables/rod linkages, and alignment

Honda specialists: D-, B-, and K-series gearboxes supported, including cable/rod linkage setup and swap compatibility checks.

While the Gearbox Is Out

  • Clutch kit and release bearing replacement
  • Flywheel resurface or lightweight upgrade
  • Rear main seal replacement and mount inspection

Fluids & Specifications

We use OEM-approved or better fluids matched to your gearbox specification for smooth shifts and longevity. Alternative performance fluids available on request.

Testing & Warranty

  • Road test with temperature and noise checks
  • Post-rebuild torque verification and leak inspection
  • Written report and bedding-in guidance
  • Warranty coverage on parts and labour (terms apply)