P0740 on Ford
Torque Converter Clutch Circuit Malfunction
P0740 on Ford vehicles indicates torque converter clutch circuit malfunction. Au7o has documented this code across 3 Ford models — most commonly on Crown Victoria, F-150, Freestar. This code indicates a malfunction in the torque converter clutch (TCC) circuit of an automatic transmission. The torque converter clutch mechanically locks the engine to the transmission at cruising speed to improve fuel economy and reduce slippage, and it is engaged by a solenoid controlled by the transmission computer. The code sets when the computer detects an electrical problem with the clutch circuit or sees that the clutch is not engaging or holding as expected. Common signs include slipping, shuddering, poor fuel economy, or stalling when coming to a stop. Typical repair costs on Ford range from $200 to $3,500, depending on the specific model and root cause.
Common Causes of P0740
- •Faulty torque converter clutch (TCC) solenoid
- •Low or contaminated transmission fluid
- •Wiring or connector fault in the TCC circuit
- •Worn or failing torque converter
- •Valve body wear or sticking valves
- •Internal transmission electrical short
- •Faulty transmission control module
P0740 on Ford by Model
Ford Crown Victoria(1 issue)
- 4R70W/4R75W Transmission Shift Solenoid Pack Failure1998-2011
The 4R70W and 4R75W automatic transmissions used in the 1998-2011 Ford Crown Victoria are prone to shift solenoid pack failure, causing erratic shifting, failure to shift into certain gears, or the transmission getting stuck in a single gear (limp mode). The solenoid pack contains multiple electronically controlled solenoids (Shift Solenoid A, B, C, and the TCC solenoid) that regulate hydraulic fluid flow to engage gear clutch packs. These solenoids wear out from heat cycling, fluid contamination, and electrical degradation over time. The Transmission Repair Cost Guide documents this as a common issue across Ford 4.6L-equipped vehicles. Codes P0750, P0755, P0760 (shift solenoid A/B/C malfunction) and P0740/P0743 (TCC solenoid) are the most commonly associated DTCs.
Ford F-150(1 issue)
- 10-Speed Transmission Shudder/Harsh Shifts2017-2023
The 10R80 10-speed automatic transmission can develop a shudder during light acceleration, typically between 25-50 mph. This is caused by torque converter clutch issues and affects many F-150s. Ford has released multiple TSBs and fluid updates to address this.
Ford Freestar(1 issue)
- Torque Converter Shudder and Transmission Failure2004-2007
The Freestar inherited many of the Windstar transmission problems. The torque converter develops shudder during light acceleration, and the transmission can fail completely with forward clutch pack burn-up.
Looking for P0740 on a different make?
View P0740 across all makes →Frequently Asked Questions
What does P0740 mean on Ford?▼
P0740 stands for "Torque Converter Clutch Circuit Malfunction." This code indicates a malfunction in the torque converter clutch (TCC) circuit of an automatic transmission. The torque converter clutch mechanically locks the engine to the transmission at cruising speed to improve fuel economy and reduce slippage, and it is engaged by a solenoid controlled by the transmission computer. The code sets when the computer detects an electrical problem with the clutch circuit or sees that the clutch is not engaging or holding as expected. Common signs include slipping, shuddering, poor fuel economy, or stalling when coming to a stop. On Ford specifically, this code is documented across 3 models.
What causes P0740 on Ford vehicles?▼
Common causes on Ford: Faulty torque converter clutch (TCC) solenoid, Low or contaminated transmission fluid, Wiring or connector fault in the TCC circuit, Worn or failing torque converter, Valve body wear or sticking valves. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0740 on a Ford?▼
Repair costs on Ford range from $200 to $3,500, depending on the specific model and root cause.
Which Ford models have P0740 documented?▼
Au7o has documented P0740 on 3 Ford models: Crown Victoria, F-150, Freestar.