MajorCommonTransmission

GWM Haval H6: 7DCT Gearbox Oil Overheating Warning in Sustained Traffic

7DCT Gearbox Oil Overheating Warning in Sustained Traffic is a common transmission fault on the GWM Haval H6 on the 2013 onward cars, and we rate it major. Putting it right costs $300 to $1,800 at New Zealand independent workshop rates. Below is what goes wrong, the symptoms to notice on a test drive, where to look, and what to ask the seller before you hand over any money. It is one of 7 documented faults on the GWM Haval H6.

Vehicle: GWM Haval H6
Years: 2013 onward
Fuel: petrol
Gearbox: dct
System: Transmission

This page covers the GWM Haval H6 as a model. Some faults only affect particular engines or build years — enter a plate below to narrow the list to one car.

All GWM Haval H6 faults7 documented faults on this model

What you are looking at

No photograph available

We do not hold a verified photograph of the Clutch yet. We would rather show none than show a picture of a different part.

What goes wrong

Both B01 and B06-generation H6 models equipped with the 7-speed DCT can trigger a gearbox over-temperature warning after extended periods of slow stop-start driving or steep incline manoeuvring. The dry and wet DCT variants both exhibit marginal heat rejection when the clutch packs are repeatedly slipping in traffic. The system may command the vehicle into a limp-home mode limiting speed to protect the transmission. Gearbox oil condition is a key factor as degraded fluid substantially reduces the overheating threshold.

What you would notice

Transmission over-temperature warning on dashboard in heavy traffic
Vehicle enters limp mode, restricting speed to approximately 40-60 km/h
Sluggish or unresponsive gear changes after prolonged city driving
Harsh gear engagement after warning has been triggered

How to check it

Where to look. 7-speed DCT unit, centre-rear of engine bay

Inspect transmission fluid condition and level.
Review service history for gearbox fluid change frequency.
Test drive in sustained low-speed conditions and monitor for temperature warning.
If a workshop inspection is possible: Check for transmission over-temperature fault codes via OBD scan.

Parts involved: Clutch.

What it costs to put right

$300 to $1,800 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

Ask the seller

“Has a transmission over-temperature warning ever appeared?”
“Has the vehicle ever entered limp mode in traffic?”
“When was the gearbox oil last changed?”

Now check the GWM Haval H6 you are actually looking at

Everything above is true of the model, and it is free. What it does not tell you is whether THIS car has been looked after: its odometer history and whether the reading has ever gone backwards, whether there is still money owing on it, whether it has been reported stolen, how many owners it has had and what it is really worth today. That comes from the official records for that plate. Enter the plate for the free details, or get the full history and a market valuation from $13.49.

Not sure what you would be paying for? See what a full KickTyres check includes.

Where this comes from

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.

GWM Haval H6 buyer questions

Is 7dct gearbox oil overheating warning in sustained traffic serious on a GWM Haval H6?

We rate it major and common on the GWM Haval H6. Both B01 and B06-generation H6 models equipped with the 7-speed DCT can trigger a gearbox over-temperature warning after extended periods of slow stop-start driving or steep incline manoeuvring. The dry and wet DCT variants both exhibit marginal heat rejection when the clutch packs are repeatedly slipping in traffic. The system may command the vehicle into a limp-home mode limiting speed to protect the transmission. Gearbox oil condition is a key factor as degraded fluid substantially reduces the overheating threshold.

How much does it cost to fix on a GWM Haval H6?

$300 to $1,800 at New Zealand independent workshop rates. That figure is for this job on its own. A car showing the symptoms on this page is usually worth either walking away from or negotiating down by at least the repair figure.

Which GWM Haval H6 years are affected?

Our research records this fault on the 2013 onward GWM Haval H6. Build dates move around, especially on imported cars, so treat the range as the years to look hardest at rather than a guarantee either way. The official records tell you the exact build and first registration date for the car in front of you.

How do I check for it before I buy?

Inspect transmission fluid condition and level. Review service history for gearbox fluid change frequency. Test drive in sustained low-speed conditions and monitor for temperature warning. If a workshop inspection is possible: Check for transmission over-temperature fault codes via OBD scan. Look here: 7-speed DCT unit, centre-rear of engine bay