Toyota Corolla Altis Gearbox Overhaul: A Full Rebuild Plus a CV Joint and an Oil Leak Repair

This Toyota Corolla Altis came in with a gearbox that needed an overhaul. While it was with us we also found a torn driveshaft boot, and the owner asked us to repair an engine oil leak. Here is what we did.

Job completed: June 2026

Silver Toyota Corolla Altis on the lift at our Singapore workshop for a gearbox overhaul

Job completed: June 2026. Last updated: October 2026. Written from our workshop job records and photos; technical details are generalised where the records do not confirm them.

CarToyota Corolla Altis
SymptomOn early mornings the car would not move when the accelerator was pressed, as if in neutral; a torn driveshaft boot and an engine oil leak also needed work
Fault foundA gearbox fault that needed a full overhaul, a split front CV joint boot letting grease out, and an engine oil leak
Repair doneFull gearbox overhaul with all internal consumables, replaced the front driveshaft boot and CV joint, and replaced the valve cover gasket and plug seals, the VVT-i valve and the oil sump for the oil leak
PartsOEM-grade replacement parts
Time takenTimeline confirmed after strip-down
CostAround $2,180 before GST for the gearbox overhaul; around $3,400 including GST for the full visit
Warranty2 years / 40,000km on the gearbox overhaul

What the owner reported

The owner got in touch about a Toyota Corolla Altis that, on early mornings, would not move when the accelerator was pressed. It felt as if the car was in neutral. After a check we confirmed it needed a gearbox overhaul. The owner was honest with us: the car has about two years left before it is scrapped, so the work had to be sensible and priced fairly.

The ask was clear. Fix the gearbox at a fair price so the car could see out those two years. While it was with us, two other issues needed attention.

Silver Toyota Corolla Altis up on the lift for a gearbox overhaul at our Sin Ming workshop in Singapore

The car

The car is a Toyota Corolla Altis, one of the most common family cars on Singapore roads. It has an automatic gearbox, and the front wheels are driven through driveshafts with CV joints at each end. Each CV joint is protected by a rubber boot packed with grease.

These cars are tough and high mileage, but the gearbox internals, the CV joint boots and the engine seals all wear with age. When the gearbox parts wear, shifts get rough or slip. When a CV boot splits, the grease escapes and the joint wears out. We check the whole car so we catch these together rather than one visit at a time.

How we diagnosed it

We confirmed the gearbox fault first. The gearbox needed a full overhaul.

On the front right driveshaft, the inner CV joint boot had split, letting the grease out, which means the joint runs dry and wears. There was also an engine oil leak, which the owner asked us to repair. For that we quoted a new valve cover gasket with plug seals, a VVT-i valve with its O-ring, and a new oil sump with its drain nut. None of these fix themselves, and a split CV boot in particular only gets worse the longer it runs.

We sent the owner photos and videos of what we found and quoted each item before starting. The owner chose to do the gearbox overhaul, the CV joint and the oil leak together in one visit.

Torn CV joint boot on a Toyota Corolla Altis front driveshaft found during inspection in Singapore

Why these faults turn up together on an older car

On a well-used car, wear shows up in a few places at once. Inside the gearbox, the parts that change gears wear over the years until shifts get rough or slip. On the driveshafts, the rubber CV boots harden and crack with heat and age, then split and let the grease out. Engine seals dry out and start to weep oil.

Doing them together while the car is already on the lift saves the owner time and a second round of labour.

What we did

We did the work properly and in one visit.

  • Removed the gearbox, stripped it down and overhauled it with all the internal consumables.
  • Replaced the torn front driveshaft boot and the CV joint.
  • Replaced the valve cover gasket and plug seals, the VVT-i valve with its O-ring, and the oil sump with its drain nut, for the engine oil leak.

We kept the owner updated through the job. Because the gearbox had to come out and be overhauled, the work took the time it needed. The full gearbox overhaul carries a 2 year / 40,000km warranty.

New valve cover gasket set, VVT-i valve and engine oil sump for the Toyota Corolla Altis oil leak repair in Singapore

Before and after

Before

  • Car would not move off on early mornings, as if in neutral
  • A split CV joint boot letting grease out
  • An engine oil leak
  • A car needing several jobs sorted

After

  • Gearbox fully overhauled
  • New driveshaft boot and CV joint fitted
  • New valve cover gasket, VVT-i valve and oil sump fitted
  • All three jobs done in one visit

What a Toyota Corolla Altis gearbox overhaul costs in Singapore

On this Corolla Altis the gearbox overhaul came to around $2,180 before GST with a 2 year / 40,000km warranty. The owner also chose to replace the torn CV joint boot, around $280 before GST with the CV joint, and to have the oil leak repaired in the same visit, bringing the visit to around $3,400 including GST.

What moves the price is what we find once the gearbox is open, and whether extra jobs like the CV joint are done together. Doing related repairs in one visit saves a second round of labour. We check first, then quote each item clearly so the owner decides what to do.

How to catch it early

For the gearbox, watch for rough or slipping shifts, a delay before drive engages, or burnt-smelling fluid. Changing the gearbox oil on schedule helps it last.

For the driveshafts, a clicking sound on tight turns often means a worn CV joint, and a torn boot is the usual cause. If you ever spot grease flung around inside a front wheel, get the boot checked before the joint wears out. For oil leaks, a dark patch under the car or a dropping oil level is the early sign. Catching any of these early keeps a small job from turning into a big one.

About the workshop

This Toyota Corolla Altis (Gearbox overhaul) was handled at 1 Car Service, an independent workshop in Sin Ming AutoCity, Singapore. The work is backed by our 2-year, 40,000km warranty. We hold a 4.9★ rating from 1,836+ Google reviews.

When to get your car checked

Gearbox not shifting right? Get an honest check first.

WhatsApp us your car model, year and what the gearbox is doing. We'll check it, tell you what it actually needs and quote before any work begins. A full gearbox overhaul is backed by a 2 year / 40,000km warranty.

Toyota Corolla Altis gearbox overhaul: common questions

How much does a Toyota gearbox overhaul cost in Singapore?

On this Corolla Altis the gearbox overhaul came to around $2,180 before GST, with a 2 year / 40,000km warranty. What another car needs depends on what is worn inside, so we check the car first, then quote before any work begins.

Should I overhaul the gearbox or just change the fluid?

If the gearbox is only due for fresh fluid and nothing is worn, a fluid change is enough. Once the internal parts are worn and the gearbox is slipping or shifting roughly, fresh fluid does not bring them back. At that point an overhaul is the proper fix. We check first so you are not paying for more than the car needs.

What is a CV joint boot and why does it matter?

The CV joint lets the driveshaft turn the wheel while the suspension and steering move. It is packed with grease and sealed by a rubber boot. When the boot splits, the grease escapes and the joint runs dry and wears out. Catching a torn boot early often means replacing just the boot and joint instead of the whole driveshaft.

Can you do several repairs in one visit?

Yes. On this Corolla Altis we did the gearbox overhaul, the CV joint and the oil leak repair together while the car was already on the lift. Doing related jobs in one visit saves a second round of labour.

Is the gearbox overhaul covered by a warranty?

Yes. A full gearbox overhaul at our workshop carries a 2 year / 40,000km warranty, whichever comes first. We confirm the exact terms with you before the work starts.

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