Toyota Harrier: A541E Automatic Transmission Torque Converter Clutch Shudder

The four-speed A541E automatic transmission fitted to MCU10/MCU15 Harrier models suffers from torque converter clutch (TCC) shudder at highway cruise speeds, typically between 60 and 100 km/h under light throttle when the TCC lock-up engages. The shudder is caused by glazed or worn TCC friction material combined with degraded ATF that has lost its friction-modifier additive package. Toyota issued Technical Service Bulletin TC003-03 recommending an ATF drain-and-fill with Toyota Type T-IV fluid as a first-stage remedy. If fluid replacement does not resolve the shudder, the torque converter requires replacement. The fault is frequently misdiagnosed as an engine misfire or driveline vibration.

• Rhythmic whole-body shudder at 60–100 km/h under light throttle that disappears with increased or released throttle
• Fault code P0741 or P0740 stored in the TCM
• ATF that is dark brown in colour and smells burnt
• Shudder absent in lower gears but present specifically in fourth gear lock-up

1. 1

   Test drive at highway speed (80–100 km/h) with light, steady throttle and note any rhythmic vibration or shudder felt through the floor and seat.

2. 2

   The shudder should appear and disappear as throttle is modulated.

3. 3

   Check ATF condition on the dipstick — dark, burnt-smelling fluid indicates degraded friction modifiers.

4. 4

   Confirm the fluid is Toyota Type T-IV or equivalent, not a generic ATF.

5. 5

   If a workshop inspection is possible: Connect an OBD-II scanner and check for P0741 (TCC performance) or P0740 DTCs.

Parts involved: Torque converter, Clutch.

$600 to $2,400 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 automatic transmission fluid ever been serviced and what fluid type was used?”
• “Have you noticed any shudder or vibration when cruising on the motorway?”
• “Has a transmission-related fault code ever appeared on the vehicle?”

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.