Singapore's Best Transmission Overhaul Specialists

A gearbox overhaul covers the mechanical internals: clutch packs, seals, gaskets, the transmission filter, and correct-specification fluid. Everything inside the casing that wears out is replaced, and the gearbox is rebuilt to last 100,000km or more under normal driving. A transmission overhaul does all of that, then addresses three more parts.

Transmission control module (TCM). The electronic brain of your transmission. It reads speed sensors, throttle position, engine load and driver input, then commands shift timing, shift quality, torque-converter lockup and fluid pressure. When the TCM develops faults, the gearbox behaves erratically even when the internals are healthy. A factory-refurbished TCM resets the system with a known-good unit rather than an electronic module of unknown remaining life. 6-month warranty.

Torque converter. The hydraulic coupling between engine and gearbox. It transfers and multiplies torque, lets the engine idle while you're stopped, and locks up at cruise for efficiency. A failing one causes shuddering, slipping, overheating and fluid contamination that spreads through the gearbox internals. A refurbished torque converter removes that ongoing source of stress. 6-month warranty.

Valve body. The hydraulic control centre: a precision aluminium block of solenoids, pressure valves and fluid passages that direct pressure to the clutch packs and control gear selection. Worn solenoids and pressure faults cause harsh shifts, delayed engagement and fault codes that are often misread as gearbox failure. A reconditioned valve body, machined to tolerance in a specialist facility, restores hydraulic precision. 6-month warranty.

Put all four together and every major part of the transmission has been properly addressed. That is a transmission overhaul.

For the TCM, torque converter and valve body, we don't use scrapyard parts and we don't use generic aftermarket alternatives. Factory-refurbished means the unit has been disassembled, worn parts replaced, critical surfaces machined back to specification, tested under controlled conditions, and verified against the manufacturer's performance parameters before it leaves the refurbishment facility.

That's a different standard from a used part pulled off a scrapped car. A used part has unknown history, unknown prior wear and unknown remaining life. It may have sat on a shelf for months, and the car it came from may have been scrapped precisely because the transmission failed.

Factory-refurbished units sit at the meeting point of cost and reliability. They cost much less than new OEM units while restoring performance to a standard we can stand behind with a real warranty. That's what we fit on every transmission overhaul.

1. Free diagnostic scan and system assessment. Brand-specific equipment for your make and model, a full fault read across the TCM, gearbox and sensors, and a check of the fluid condition. We build a complete picture before recommending any scope. No charge, no obligation.
2. Transparent, itemised quote. A full breakdown covering the gearbox overhaul, the TCM, the torque converter, the valve body, and the fluid and filter service. Each part is listed separately with its cost and warranty.
3. Gearbox overhaul. Complete disassembly and every consumable replaced: clutch packs, all seals, all gaskets, the filter. The gearbox rebuild uses OEM-grade parts. This is the core of the job and carries the 2-year / 40,000km warranty.
4. TCM replacement. The existing module is replaced with a factory-refurbished unit matched to your transmission variant, then programmed and calibrated for your car as required.
5. Torque converter replacement. Replaced with a factory-refurbished unit matched to your spec.
6. Valve body replacement. Replaced with a factory-refurbished unit reconditioned in a specialist facility, with full solenoid replacement, precision machining and bench verification.
7. Fluid and filter service. Fresh correct-specification fluid for your exact model and a new filter, filled and checked before any testing.
8. Adaptive reset and final calibration. The TCM's adaptive learning values are reset so it relearns shift parameters with the new components instead of compensating for the old ones.
9. Road test and verification. A thorough test across low-speed manoeuvring, urban driving, highway cruise and hard acceleration, followed by a final scan to confirm no fault codes remain.
10. Collect with documented warranties. Separate documentation for each part: 2-year / 40,000km on the gearbox overhaul, 6 months on the TCM, torque converter and valve body.

Most transmission overhauls are completed within 4 to 7 working days, depending on the make, model and parts availability. We confirm the timeline after the scan and keep you updated throughout.

Singapore's heat, humidity and stop-start traffic accelerate wear on every transmission. The weak points vary by type.

Conventional automatic (AT). Usually fails from fluid degradation, which speeds up in the heat and causes friction and overheating. Torque-converter problems and failing solenoids also impede power transfer and accelerate wear. These are the transmissions a full overhaul is built around.

Continuously variable transmission (CVT). Tends to suffer belt or chain slippage under load or when the pulleys wear. Fluid degradation in our climate affects performance and causes overheating, so prompt fluid changes matter more here than most owners expect.

Dual-clutch (DCT, including DSG and PDK). Combines manual efficiency with automatic convenience, but clutch wear is common, software glitches cause poor shifting, and hydraulic-system or mechatronic faults can be serious. These are handled through our dedicated dual-clutch and mechatronic services rather than the conventional overhaul scope above.

Whatever you drive, regular fluid changes and early attention to unusual noises, hesitation or leaks stop small issues from becoming major failures.

A full transmission overhaul costs more than a gearbox overhaul alone, because it involves four major component jobs rather than one. The exact figure depends on your make, model and specific transmission system.

We always diagnose first and quote every component separately, so you see what each part of the job costs before we start: the gearbox overhaul, the TCM, the torque converter, the valve body, and the fluid and filter service. No bundled pricing that hides where your money goes. WhatsApp us your make, model, year and symptoms and we'll give you a realistic ballpark before you come in; the full itemised quote follows the free diagnostic scan.

1 Car Service is Singapore's best transmission overhaul specialist, with a team of expert gearbox technicians experienced across all makes and models. We scan the whole system with dealer-level diagnostics, rebuild it properly, and back the gearbox rebuild with the longest warranty in Singapore: 2 years or 40,000km. Free honest diagnosis, quick turnaround, and you can spread the cost with Atome, Grab or Shopee.

WhatsApp us now for a free diagnosis and an honest quote. We'll tell you straight what your transmission needs and what it costs, and sort it for good.