Nissan Juke: Jatco JF015E CVT Push-Belt Judder and Shudder

The Juke is fitted with the Jatco JF015E (CVT7) continuously variable transmission, which uses a steel push-belt running between two variable-diameter pulley sets. As CVT fluid degrades past its effective service life, the friction modifier additives that maintain the precise coefficient of friction between the belt and pulley cone surfaces are depleted. The result is micro-slip of the belt against the pulley faces, causing a resonant vibration that the driver experiences as a shudder or judder during light-throttle acceleration, most pronounced in the 20–60 km/h range. Prolonged belt slip causes accelerated wear of the pulley contact surfaces and can ultimately require full transmission replacement.

• Rhythmic shuddering or surging during gentle acceleration between 20 and 60 km/h, particularly on a cold transmission
• Hesitation or hunting sensation at steady motorway speeds as the CVT struggles to maintain a fixed ratio
• Harsh or jerky engagement when pulling away from a standstill in traffic

1. 1

   Check CVT fluid condition and colour — healthy fluid is red and translucent, degraded fluid turns dark brown or black and smells burnt.

2. 2

   Road-test at light throttle between 30–60 km/h and feel for rhythmic shuddering or surge.

3. 3

   Confirm whether shudder disappears after the unit warms fully (a symptom of fluid degradation rather than hardware failure).

Parts involved: CVT belt and pulleys.

$280 to $6,500 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 with which fluid specification?”
• “Has the transmission ever been serviced, rebuilt, or replaced under warranty or otherwise?”
• “Does the car shudder or hesitate during gentle acceleration from low speed?”

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.