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Honda Odyssey Gearbox Overhaul: Done Before an Oil Leak Could Burn the Clutch

This Honda Odyssey had no gearbox symptoms. The owner was extending the COE and wanted the gearbox overhauled. When we opened it, the old clutch plates were still OK, not totally worn out. But there was an oil leak, and if the oil ran out the clutch would burn. So we did a full automatic gearbox overhaul, with a fresh clutch pack, seals and gaskets.

Job completed: June 2026

Honda Odyssey automatic gearbox opened up, with the casing halves and gears laid out at our Singapore workshop

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.

CarHonda Odyssey, automatic
SymptomNo gearbox symptoms; the owner was extending the COE and wanted the gearbox overhauled
Fault foundOld clutch plates still OK, but an oil leak that could burn the clutch if the oil ran out
Repair doneFull gearbox overhaul: new clutch pack, seals, gaskets and fresh transmission oil
PartsOEM-grade overhaul parts and fresh transmission oil
Time takenTimeline confirmed with the quote
CostQuoted $2,600 before GST
Warranty2 years or 40,000km, whichever comes first

What the owner reported

The owner messaged us asking for a gearbox overhaul on this Honda Odyssey. There were no symptoms or problems. The owner was extending the COE and wanted the gearbox done, and had also noticed oil leaking. We asked to see the car first, and the owner brought it in.

We quoted the overhaul once the car was with us. Later, when we reported the other parts that needed work, the owner's instruction was simple and clear. Do it up properly, fix whatever is spoilt, make it like new.

Old and new clutch friction plates laid on the opened Honda Odyssey automatic gearbox at our Singapore workshop

The car

The Honda Odyssey is a large, heavy MPV, and all of that weight goes through the automatic gearbox.

Inside an automatic gearbox are clutch plates that take the drive, and transmission oil that cools and protects them. The plates wear over time, and the oil breaks down with heat and age. Singapore's heat and stop-start traffic speed both up.

What we found inside

The overhaul was agreed before we opened anything. With the box apart, we could see the clutch plates and the internal parts clearly.

The old clutch plates were still OK, not totally worn out yet. But there was an oil leak, and our advice to the owner was direct: fix it before the oil runs out. If the oil runs empty, the clutch burns and the car stops moving altogether. So the clutch plates were changed as part of the overhaul.

We also sent the owner a video and photos of the opened box, so the owner could see the inside, not just take our word for it.

Honda Odyssey automatic gearbox dismantled into casing halves, with gears laid out on the workshop floor

Why the oil leak mattered

An automatic gearbox lives on its oil. The oil cools the clutch plates and gives the pressure that makes them grip. Seals and gaskets harden with age and heat, and a hardened seal can start to leak.

A slow leak lowers the oil level. Run a gearbox low on oil and the clutches slip, overheat and burn, and then the car cannot move. On this car the clutch plates were still OK when we opened the box, so the leak was caught before it did that damage.

What we did

Once the owner approved, we carried out a full gearbox overhaul. The box came out and was taken apart.

  • Replaced the clutch plates with a fresh clutch pack.
  • Replaced the seals and gaskets so the rebuilt box would not weep oil.
  • Refilled with fresh transmission oil to the correct level.
  • Reinstalled the box and frame.

The gearbox overhaul was quoted at $2,600 before GST, with quality OEM-grade overhaul parts. The same visit, with the owner's go-ahead, also sorted a valve-cover engine oil leak, the front and rear absorbers, the engine mounts and the front brakes, so the whole car went back tidy. At collection, the owner remarked that almost everything on the car had been changed.

Before and after

Before

  • No gearbox symptoms; the owner was extending the COE
  • Old clutch plates still OK, but an oil leak
  • Risk of the clutch burning out if the oil ran low

After

  • Gearbox fully overhauled
  • Fresh clutch pack and new seals inside
  • Valve cover, absorbers, engine mounts and front brakes also done
  • Handed back once the work was done

What a Honda Odyssey gearbox overhaul costs in Singapore

This job was quoted at $2,600 before GST for the overhaul, once the car was with us and before any work began. It covered the clutch pack, seals, gaskets and fresh transmission oil, with a 2 year or 40,000km warranty.

The valve body and the torque converter were excluded from that price. If either of those needs work, it is a separate item and the cost goes up.

How to avoid this

Automatic gearbox oil does not last forever, especially in Singapore traffic and especially on a heavy MPV. Changing the transmission oil on time is the single most important thing you can do. Fresh oil keeps the clutches cool and the box healthy.

The honest part: once the clutch plates are worn and a seal is leaking, an oil change alone will not fix it. New oil cannot un-wear the plates or reseal a hardened gasket. At that point an overhaul is the proper repair. The trick is to act on the early signs, a gearbox that no longer shifts cleanly or a small oil patch under the car, before the wear spreads and the box burns out.

About the workshop

This Honda Odyssey (Automatic 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 gearbox checked

Gearbox slipping, jerking or leaking? Get a free check.

WhatsApp us your car model, year, mileage and what you are feeling. We'll tell you what is likely wrong and what it costs before any work begins. Every gearbox overhaul is covered 2 years or 40,000km.

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Honda Odyssey gearbox overhaul: common questions

How much does a Honda Odyssey gearbox overhaul cost in Singapore?

This job was quoted at $2,600 before GST, covering the clutch pack, seals, gaskets and fresh oil, with a 2 year or 40,000km warranty. The valve body and torque converter were excluded; if either needs work, that costs extra. We quote before any work begins.

Why is my Honda Odyssey gearbox not driving right?

Many things can cause it: low or old transmission oil, worn clutch plates, a leaking seal or a valve body fault. The only honest answer comes from checking the car. This Odyssey had no symptoms at all. The owner wanted the gearbox overhauled while extending the COE, and its oil leak made it worth doing before the clutch could burn.

Can an oil change fix a worn Honda Odyssey gearbox?

Only if you catch it very early. Once the clutch plates are worn and a seal is leaking, fresh oil cannot reverse the wear or reseal the box. At that stage a full overhaul is the proper fix. Regular oil changes are what prevent it in the first place.

Is it safe to keep driving with a gearbox oil leak?

It is risky. If the oil leaks until the level drops too low, the gearbox loses cooling and pressure, the clutch burns, and the car can stop moving altogether. It is far cheaper to fix the leak and the worn plates early than to wait for the box to fail completely.

How long does the overhaul take?

The time on a gearbox overhaul like this Odyssey's depends on how much of the box is worn and what parts are needed. We give you the timeline with the quote, before any work begins.

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