Toyota Voxy: Super CVT-i Belt Judder and Shudder Under Low-Load Acceleration

AZR60G and AZR65G variants fitted with Toyota's Super CVT-i transmission can develop a pronounced shudder or judder during light-throttle low-speed acceleration, typically between 20 and 60 km/h. The condition is caused by microscopic slippage between the steel push-belt and the primary and secondary pulley faces when CVT fluid has degraded or the belt-clamping hydraulic pressure is at its minimum. Degraded fluid loses its friction-modifier properties, allowing stick-slip oscillations between the belt and pulleys that the driver feels as a rhythmic vibration or lurch; if left unaddressed the belt and pulley faces can develop micro-pitting that requires a full transmission overhaul.

• Rhythmic shudder or vibration felt through the floor and seat under gentle acceleration at low to moderate speeds
• Condition improves or disappears at higher throttle openings or highway speeds
• Hesitation or brief loss of drive during the judder event before the transmission catches up
• CVT fluid that is dark brown, smells burnt, or has visible contamination on the dipstick

1. 1

   Test-drive at light throttle between 30 and 60 km/h on a flat road and note any rhythmic shudder or vibration through the floor.

2. 2

   Check CVT fluid condition on the dipstick: fluid should be clear pink-red; brown or dark fluid with a burnt smell indicates overheating or advanced degradation.

3. 3

   Ask for the CVT fluid service history; Toyota specifies genuine Toyota CVT fluid (TC) only.

Parts involved: CVT belt and pulleys.

$180 to $4,200 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.

• “Has the CVT fluid ever been changed, and what fluid type was used?”
• “Is there any vibration or shudder felt when pulling away gently from a standstill?”
• “Does the transmission feel smooth at all speeds or are there any hesitation events?”

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.