Gearbox repair cost UK

Labour is most of any gearbox bill. The box has to come out of the car — 4 to 8 hours — whether you’re fixing one bearing or fitting a complete reconditioned unit. That’s why repairing a £60 bearing costs £500+ and why the repair-vs-recon decision leans further toward recon than intuition suggests: the expensive part of both jobs is the same part.

Which transmission you have sets the tier. Manuals are the cheap end — simple, well understood, every specialist can open one. Twin-clutch boxes (DSG, Powershift, Mercedes 7G-DCT) add electronics and clutch packs; CVTs add belts, pulleys and fewer specialists willing to open them; BMW’s ZF torque converters rarely fail but cost properly when they do. Same symptom, four different bills.

How early you act decides which bill you get. A whining bearing caught early is a repair; ignored, it collapses and machines the casing from inside, turning a £600 job into a £2,000 one. Gearboxes almost never fail without weeks of noises first — the six-symptom decoder below is the early-warning system, and the oil service next is the cheapest intervention in this entire guide.

Here’s the honest sentence the trade says quietly and brochures never print: “sealed for life” means sealed for the warranty’s life. Automatic gearbox fluid does two jobs — lubrication and hydraulic pressure — and it degrades doing both. Burnt, tired fluid shifts late, slurs, judders and hesitates in ways that perfectly impersonate a dying gearbox, which is why specialists report a striking share of “failing” automatics arriving on a recovery truck and leaving after a £150–£280 oil and filter service. Sensible intervals, whatever the handbook implies: every 40,000 miles for DSG boxes (VW’s own recommendation), every 30,000–60,000 for conventional automatics and CVTs, and £60–£120 for a manual box’s oil while you’re thinking about it.

The rule that follows is the most valuable on this page: no automatic gearbox gets condemned before its fluid is inspected and its fault codes are read. Fresh fluid plus an adaptation reset (the software relearning its shift behaviour) rescues real cars every week; and even when it doesn’t, the fluid’s condition — colour, smell, glitter of metal in it — tells the specialist exactly how deep the real problem goes before anyone quotes four figures. Which hands you the question to ask the moment someone says “new gearbox”: “was the oil condition checked and the codes read first — and what did the fluid look like?” A specialist answers with a description. A parts-swapper changes the subject.

If you drive a DSG Golf, Polo or S tronic Audi, one component owns this section: the mechatronic unit — the combined computer and hydraulic valve block bolted inside the gearbox that decides every shift. It’s the DSG’s most common major failure, and its symptoms are distinctive: hesitation pulling away, jerky first-to-second shifts, gear warning lights, sudden limp-home with flashing indicators on the dash. The bill has tiers worth knowing before the dealer names theirs: a software update or adaptation reset (£100–£150) cures the glitch cases; a refurbished mechatronic from an electronics specialist costs a few hundred pounds plus fitting; a new unit fitted at an independent DSG specialist runs £1,100–£2,000; and a main dealer commonly quotes £2,500–£3,500 for the same outcome. Same brain, four prices.

Two more DSG truths. Prevention is absurdly cheap relative to cure: the 40,000-mile oil and filter service exists precisely because degraded fluid is the biggest contributor to mechatronic damage — £220 every four years versus £1,500 once is the whole argument. And the DSG’s other wear item is its clutch packs, which are a clutch story, not a gearbox story — juddery take-off on a high-mileage DSG often means the packs, priced and reasoned like any clutch job. A DSG specialist will tell you which within an hour’s diagnosis; that hour is the best £50–£80 in this guide’s upper price bands.

The most expensive misdiagnosis in manual motoring runs both directions, so run the triage before any quote sticks. Revs rise but speed doesn’t — that’s slip, and slip is the clutch (£450–£750), never the gearbox; a gearbox physically cannot slip. Judder and rattle at idle or pulling away — on diesels and bigger engines that’s the dual-mass flywheel’s signature, the clutch-and-DMF job (£650–£1,090). Crunching into one particular gear, jumping out of gear on the overrun, whining that changes with road speed — now you’re genuinely in gearbox territory: synchros, detents and bearings respectively. The three systems bolt to each other and share the same removal labour, which is the one mercy: if the diagnosis lands on the border — a worn clutch and a whining input bearing, say — doing both in one strip-down costs far less than two visits, and a specialist who finds one will inspect the other for free while it’s all on the bench.

Gearboxes are the repair where the third player isn’t optional: dedicated transmission specialists rebuild boxes all day, stock recon units with real warranties, and charge specialist prices that undercut dealers by a wide margin. Many collect the car. For anything beyond an oil service, get at least one specialist quote in the comparison. Compare gearbox specialists and garages near you →

When a gearbox is genuinely gone, four paths diverge, and the right one is mostly about the car’s value and your ownership horizon. Internal repair (£450–£900 manual): right when one identified part failed — a bearing, a synchro — and the rest of the box inspects clean on the bench. Used box from a breaker (£600–£900 fitted): the gamble tier — you’re buying someone else’s driving history with little warranty; rational on a car worth £1,500 where recon money doesn’t add up. Reconditioned unit (£800–£2,100 manual, more for autos): stripped, every wear part replaced, tested, warrantied 12 months or more — the default answer on any car worth £4,000+, because it resets the clock instead of patching it. New from the manufacturer: rarely rational outside warranty claims; the recon does the same job at a fraction.

And above the ladder sits the half-value rule: when the honest quote passes half the car’s value — easy to do here, uniquely among repairs — stop and price the whole picture before committing. Run your reg through our checker for the full number: this repair plus everything else the MOT history predicts, next to what the car is worth. Gearboxes are where that arithmetic most often changes the decision.

Service the fluid before it services you. £150–£280 every 40,000 miles (DSG) or 30,000–60,000 (other autos) is the entire prevention budget for the most expensive failure category in this guide. If you bought the car used with no fluid-change history, book one this month — and fold it into the annual service visit to share the ramp time.

Pay for diagnosis, not guesses. £50–£80 of codes-and-fluid inspection at a transmission specialist is the highest-leverage spend in motoring — it routinely converts a £2,000 conversation into a £250 one, and when it doesn’t, it tells you exactly which rung of the ladder you’re on.

Get the specialist quote. On mechatronics, clutch packs and recon units, dedicated transmission houses undercut dealers by 30–50% with equal or better warranties, and refurbished electronics undercut new ones by more. One phone call widens the market from one price to three.

Bundle the borderlands. Clutch, DMF and gearbox share one removal — if the diagnosis touches the boundary, price the combined job while everything’s out. The overlap saves £300–£500 against two separate strip-downs, and both our clutch-and-flywheel and clutch guides carry the numbers to check the combination against.