Ford Everest: 6R80 Torque Converter Clutch Shudder at Light Throttle

The 6-speed SelectShift 6R80 automatic transmission in the UA Everest with 3.2L TDCi is prone to torque converter clutch shudder during light-throttle cruising, typically between 40-100 km/h. The TCC locks up early and the clutch friction material degrades or glazes, producing a characteristic vibration felt through the floor and seat. Ford issued a service procedure involving a specialised transmission drain-and-fill with Mercon LV fluid and a conditioner additive, but shudder can recur within 20,000-40,000 km or require full torque converter replacement in advanced cases.

• Vibration or shuddering felt through floor and seat at light throttle between 40-100 km/h
• Shudder disappears when throttle is increased or fully released
• Rough pulsing sensation during steady-speed highway cruising
• Shudder is worse when transmission fluid is fully warm
• Transmission warning light in severe or prolonged cases

1. 1

   Test drive at steady light throttle between 60-80 km/h on a flat road.

2. 2

   Note any vibration or pulsing that resolves on throttle lift or acceleration.

3. 3

   Check transmission service history for Mercon LV fluid and TCC shudder flush procedure.

4. 4

   Ask about any recurrence of shudder after fluid service or dealer attention.

Parts involved: Torque converter, Clutch.

$550 to $4,400 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 transmission ever been serviced specifically for torque converter shudder?”
• “What fluid was used in the last transmission service and was a shudder additive used?”
• “Has any vibration or shudder been noticed during highway cruising at light throttle?”
• “Has the vehicle had any transmission-related warranty or dealer claims?”

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.