P0740 on Chevrolet
Torque Converter Clutch Circuit Malfunction
P0740 on Chevrolet vehicles indicates torque converter clutch circuit malfunction. Au7o has documented this code across 3 Chevrolet models — most commonly on Silverado 1500, Suburban, Tahoe. 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 Chevrolet range from $200 to $4,500, 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 Chevrolet by Model
Chevrolet Silverado 1500(1 issue)
- 8/10-Speed Transmission Shudder2015-2023
Both the 8-speed and 10-speed automatic transmissions can develop a shudder during light acceleration. This torque converter clutch issue is widespread across GM trucks. Multiple TSBs have been issued addressing this concern.
Chevrolet Suburban(1 issue)
- 8L90 Transmission Shudder2015-2020
Same 8L90 torque converter shudder as Tahoe/Silverado/Escalade. Light throttle shudder between 25-50 mph. GM Customer Satisfaction Program 18302 extends coverage to 6yr/100k.
Chevrolet Tahoe(1 issue)
- 8L90 8-Speed Transmission Shudder2015-2020
The 2015-2020 Tahoe uses the GM 8L90 8-speed automatic with the same widespread torque converter shudder affecting Silverado and Escalade. Shudder occurs at light throttle between 25-50 mph. Root cause is torque converter clutch material contaminating the fluid. GM extended warranty to 6 years/100,000 miles under Customer Satisfaction Program 18302.
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View P0740 across all makes →Frequently Asked Questions
What does P0740 mean on Chevrolet?▼
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 Chevrolet specifically, this code is documented across 3 models.
What causes P0740 on Chevrolet vehicles?▼
Common causes on Chevrolet: 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 Chevrolet?▼
Repair costs on Chevrolet range from $200 to $4,500, depending on the specific model and root cause.
Which Chevrolet models have P0740 documented?▼
Au7o has documented P0740 on 3 Chevrolet models: Silverado 1500, Suburban, Tahoe.