Daihatsu Hijet: CVT Judder and Shudder Under Load (S500P)

The D-CVT belt-type continuously variable transmission fitted to S500P Hijet Cargo variants exhibits judder — a low-frequency vibration — particularly during low-speed tip-in from rest or when climbing inclines under load. The judder is caused by degraded CVT fluid losing its friction-modifier properties, or by primary/secondary pulley face wear allowing micro-slippage of the steel push-belt. Commercial use with high payload accelerates fluid degradation, and Daihatsu's extended factory service interval for CVT fluid is widely considered too long for working vehicles.

• Vibration or shudder felt through the floor and seat when accelerating gently from rest, especially under load
• Hesitation or surge at low speeds giving a bucking sensation
• CVT fluid that is dark brown or has a burnt odour when checked on the dipstick

1. 1

   Test drive at low speed from a standstill on level ground and on an incline with a full load.

2. 2

   Feel for rhythmic vibration or judder through the drivetrain at 5–30 km/h.

3. 3

   Check CVT fluid condition via dipstick (should be bright red, not brown or burnt-smelling).

4. 4

   Confirm fluid change history — fluid should be replaced every 40,000 km in commercial use.

Parts involved: CVT belt and pulleys.

$200 to $4,500 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.

• “When was the CVT fluid last changed, and how many kilometres were on the vehicle at that time?”
• “Does the vehicle shudder or vibrate when pulling away from a standstill with a load on board?”

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.