Gearbox Repairs & Rebuilds in Sunbury-on-Thames
Gearbox problems can be mechanical, hydraulic or electronic. Before recommending major work, we diagnose which — sometimes the fix is a sensor, software or fluid service rather than a rebuild.
Where internal repair is needed, we carry out gearbox repairs and rebuilds.
Common signs
Symptoms worth checking
- Whining or grinding
- Slipping or flaring
- Jerking or harsh shifts
- Gearbox warning or limp mode
- Leaks
Electronic or mechanical?
Modern gearboxes are controlled by software and sensors. A failing sensor or valve body can feel exactly like mechanical failure.
We scan, review adaptations and road test before any decision to strip the gearbox.
What we check
- Fault codes and adaptation data
- Fluid condition and level
- Road test behaviour
- Mounts and leaks
What we can do
- Electronic fault repairs
- Valve body and mechatronic diagnosis
- Gearbox repairs
- Gearbox rebuilds
How it works
The process
- 01
Diagnose.
- 02
Explain options.
- 03
Repair or rebuild.
- 04
Road test and adapt.
Why The Factory
Main-dealer capability, independent service
A Master Technician-led workshop with seven mechanical ramps, a dedicated MOT ramp and dealer-level diagnostics. Faults are shown to you and additional work is quoted before it goes ahead.
We stand behind the work we carry out. Parts and workmanship are covered in accordance with your statutory rights and any applicable manufacturer or supplier warranty. Please ask us for details relevant to your repair.
- Gearbox rebuild capability
- Dealer-level diagnostics
Courtesy cars
Courtesy cars are available, subject to availability.
FAQs
Gearbox Repairs & Rebuilds: your questions answered
Why is my gearbox making a whining or grinding noise?
Bearing wear, low fluid or synchromesh wear are common causes.
Why is my automatic gearbox slipping or jerking?
Fluid condition, adaptations, sensors, valve body or internal wear — diagnosis narrows it down.
Can a gearbox fault be electronic rather than mechanical?
Yes, frequently.
When is a gearbox rebuild necessary?
When internal mechanical wear or damage is confirmed and repair is the best option.
Can you diagnose the gearbox before recommending major work?
Always.
Related services
Automatic Gearbox Servicing
Fluid servicing and flushing where appropriate for modern automatics.
BMW Gearbox Servicing
BMW automatic gearbox servicing and repair.
JLR Gearbox Repairs
Jaguar and Land Rover gearbox servicing, repair and rebuild.
Clutch Replacement
Slipping, judder and selection problems diagnosed and repaired.
Need help with gearbox repairs & rebuilds?
Send your registration and a quick description on WhatsApp, or call the workshop.
The Factory, Harris Way, Sunbury-on-Thames TW16 7EL