Nissan Navara: D40 RE5R05A five-speed automatic torque converter lock-up shudder (2.5 YD25DDTi diesel)

The RE5R05A five-speed automatic transmission used in D40 Navara 4WD models is susceptible to torque converter clutch (TCC) shudder, typically at light throttle in overdrive at 60 to 100 km/h. The TCC applies a clutch inside the torque converter to improve fuel economy; the friction material on this clutch degrades over time and causes a fine vibration or shudder that can be mistaken for a misfire or driveline vibration. Contributing factors include prolonged use of deteriorated ATF, overheating the transmission through towing, and low fluid levels. The shudder can also be caused by micro-aeration of fluid from a blocked filter or failed ATF cooler. Early intervention with a fluid and filter service and a friction modifier additive sometimes resolves mild cases; severe wear requires torque converter replacement or full transmission overhaul.

• Vibration or shudder at light throttle between 60 and 100 km/h in overdrive
• Shudder disappears when accelerating firmly or decelerating
• Shudder absent in lower gears
• Transmission fluid dark, burnt-smelling, or overdue
• Delayed engagement or harsh shifts when cold

1. 1

   Drive at steady 80 km/h on light throttle in overdrive and hold — shudder indicates TCC slip.

2. 2

   Check ATF colour and smell on the dipstick (should be red and odourless).

3. 3

   Ask for ATF service history; a flush at under 60,000 km intervals is ideal for tow vehicles.

4. 4

   Check the transmission sump externally for signs of overheating discolouration.

5. 5

   Confirm whether an aftermarket transmission cooler has been fitted if vehicle was used for towing.

Parts involved: Torque converter.

$2,500 to $6,000 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 automatic transmission fluid last changed and what product was used?”
• “Has the vehicle towed regularly and has an aftermarket transmission cooler been fitted?”
• “Has the transmission ever been serviced internally or had the filter replaced?”
• “Have you noticed any shudder or vibration at highway cruise speeds?”

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.