Classic Car Gearboxes Repair & Restoration Specialists.
Manual, automatic and overdrive rebuilds for iconic classics — Done right in Sheffield.
- Factory-grade rebuild standards
- Model-specific expertise , Covering Triumph, Classic Minis, Mercedes, Jaguar, Rover, Austin, Bentley, Rolls Royce, DeLorean and Many Others including American Cars and Pick ups
Transparent quotes and photo-documented work.
Trusted by classic car owners across the UK
• 5-star service
• Over 40 decades of combined gearbox experience
.
Manual Gearbox Rebuilds
Complete strip-downs, bearings/synchros/gears inspected and renewed to spec, precise clearances
set.
Automatic Transmission Restoration
Valve body work, clutch packs and bands replaced, seals and gaskets renewed, calibrated shifts.
Overdrive Units (Laycock, etc.)
Hydraulic/solenoid testing, cone linings, seals,
and control electrics
serviced for crisp
engagement.
Diagnostics & Preventive Maintenance
Road test, fluid analysis, noise/vibration checks, leak tracing, linkage and bush inspections.
Why Choose Mister Gearbox for Classics?
- Classic Expertise: We understand the quirks of period gearboxes and source the right parts.
- Documented Process: Photo updates at each stage — you know what’s been done and why.
- Quality Parts & Fluids: OEM or trusted equivalents, torque specs and tolerances by the book.
- Honest Quotes: Clear pricing before work begins; no surprises.
- Fast Turnaround Options: Efficient booking and priority rebuilds available.
Consultation & Quote
We review symptoms, inspect the car/gearbox, and provide a clear estimate.
Strip-Down & Inspection
Full disassembly, cleaning, and measurement to identify wear and faults.
Parts & Machining
Bearings, synchros, seals, bands, and hard parts renewed; machining arranged where required.
Rebuild & Setup
Set clearances, preload, and endfloat; valve body/overdrive calibrated to spec.
Testing & Quality Control
Bench tests and road tests where applicable; final torques recorded.
Handover & Aftercare
Detailed report, recommended run-in, and aftercare support.
Our Rebuild Process (How It Works)
- Consultation & Quote
- We review symptoms, inspect the car/gearbox, and provide a clear estimate.
- Strip-Down & Inspection
- Full disassembly, cleaning, and measurement to identify wear and faults.
- Parts & Machining
- Bearings, synchros, seals, bands, and hard parts renewed; machining arranged where required.
- Rebuild & Setup
- Set clearances, preload, and endfloat; valve body/overdrive calibrated to spec.
- Testing & Quality Control
- Bench tests and road tests where applicable; final torques recorded.
- Handover & Aftercare
- Detailed report, recommended run-in, and aftercare support.
- Frequently Asked Questions
- How long does a classic gearbox rebuild take?
- -Typical turnaround is 1–3 weeks depending on parts availability and complexity. Priority service available.
- Do you supply parts or can I bring my own?
- -We source quality parts and can use supplied components after inspection for suitability.
- Can you rebuild overdrive units?
- -Yes — hydraulic, electrical, and mechanical service, with bench testing and road verification.
- Do you offer collection/delivery?
- -Yes, vehicle or gearbox-only options can be arranged — ask for a quote.
- What warranty do you provide?
- -We warranty workmanship on rebuilds; full terms provided with your estimate.