Smooth Shifts, Powerful Drives — Restored by Gearbox Experts
Your car's gearbox (transmission) is one of the most crucial components in the entire vehicle. Whether you drive an automatic, manual, or semi-automatic, a faulty gearbox can quickly turn into a costly and dangerous problem.
At General mechanic, we specialize in high-quality gearbox diagnostics, repairs, and full replacements — helping motorists in Winchester , Eastleigh , and
Southampton stay safely and smoothly on the road.
Common Signs of Gearbox Trouble
Don’t wait for total transmission failure. If you notice any of these symptoms, book a gearbox check immediately:
🛑 Grinding, whining, or clunking sounds when shifting gears
🛑 Slipping out of gear or delayed gear engagement
🛑 Burning smell or leaking transmission fluid
🛑 Jerky or rough gear changes
🛑 Dashboard warning lights (gearbox or engine light)
🛑 Car won’t move when in gear (manual or automatic)
Whether it’s a clutch issue, gear synchronization problem, or full internal gearbox damage — we will identify it fast using state-of-the-art diagnostics.
Why Choose Us?
🚙 Decades of combined mechanical experience.
🧪 Fully trained and certified gearbox technicians
🧰 High-spec equipment and genuine parts
💬 Transparent advice with zero jargon
🏆 5-Star Google & Facebook Reviews
Expert Gearbox Solutions for Every Drive
From diagnostics to full replacements, keep your gear shifting flawlessly.
Full Gearbox Diagnostics
We use advanced scanners and road tests to pinpoint internal and external faults. Our diagnostics cover solenoids, sensors, linkages, software faults (for automatic gearboxes), and mechanical wear.
Manual Gearbox Repairs
From worn gear teeth and input shafts to selector fork damage and clutch misalignment, we carry out precision manual transmission repairs with OEM or equivalent parts.
Automatic Transmission Repairs
Automatic gearboxes are complex, requiring advanced diagnostic and repair skills. We service torque converters, replace solenoids, and recalibrate control modules for smooth, safe shifting.
Gearbox Rebuilds
If your gearbox is severely worn but not beyond repair, we can perform a full rebuild, replacing all critical internal components while saving you the cost of full replacement.
Gearbox Replacement (New & Reconditioned)
In cases where repair isn’t viable or cost-effective, we offer high-quality new and reconditioned gearboxes with full installation and warranty. We'll advise you transparently on your best option.
Clutch & Flywheel Replacement
Gearbox problems often go hand-in-hand with clutch failure. We offer clutch kits, flywheels, and hydraulic component replacements — all in one go, if needed, to save time and cost.
Testimonials
Jasmine Richards
Just had a gearbox inspection and ended up replacing the full system. Smooth service, the car runs like new. Worth every penny!
Monica Chandler
Had a few gearbox swaps before, but Gear Box Repair/Replacement's work is top-notch. Quick, efficient replacement and detailed repairs that finally fixed my transmission woes.
Thomas Krazinski
Had their transmission fluid service done here. Quite straightforward and efficient, car runs smoother now. Good upkeep routine.
FAQs
Get Answers to Your Gearbox Concerns - We're Here to Help!
How do I know if my gearbox needs repair or replacement?
Look for signs like gear shifting issues, unusual noises, leaks, or a burning smell.
How often should I have my gearbox inspected?
It's advisable to have your gearbox inspected every year or every 30,000 to 50,000 miles, depending on your vehicle’s age and your driving habits.
How long does gearbox service take?
Diagnostics take 1–2 hours. Repairs range from same-day fixes to 2–5 working days for rebuilds or replacements, depending on part availability.
Can you collect my car?
Yes! We offer free collection and return service within Winchester, Eastleigh, and Southampton.
Is there a warranty on your gearbox repair or replacement services?
Yes, all our gearbox repairs and replacements come with a 12-month or 12,000-mile warranty, covering both parts and labor.
Can driving styles affect the gearboxs health
Yes, aggressive driving can stress the gearbox, leading to premature wear. Smooth driving habits help extend its life.