How do I know if my stall converter is bad?
6 Signs of a Failing Torque Converter
- Loss of Acceleration.
- Slipping Between Gears.
- Vehicle Won’t Shift at All.
- Transmission is Overheating.
- Transmission Fluid Leak.
- Bad Transmission Fluid.
What happens if you disconnect the torque converter clutch?
But often simply disconnecting the clutch solenoid connector solved the shuddering or stalling condition. Here’s the problem with doing this. The torque converter clutch would no longer apply and the vehicle would get extremely poor fuel economy.
How is the lockup converter clutch assembly controlled?
The lockup converter clutch assembly is controlled by the engine computer or transmission control module depending on the model and the year of the vehicle. The control module energizes the relay which then sends 12 V to the lockup solenoid.
Are there any cars with a torque converter problem?
More importantly there are some vehicles that have specific problems with this electronically controlled torque converter clutch system. The poster child remains the 700r4 installed in the rear wheel drive G body cars like the Monte Carlo and Grand Prix. It’s also in the F body including the Firebird and Camaro.
When does the TCM disengage the clutch signal?
The TP sensor indicates the throttle plate angle. If the driver accelerates to wide-open throttle, the TCM disengages the TCC to downshift. The TCM uses the brake switch signal is to disengage the TCC when the vehicle slows or comes to a stop. The TFT monitors transmission fluid temperature.
What should the stall speed be on a torque converter?
If your camshaft states an RPM range of 1500-6500, for example, you would want to select a torque with a minimum of 2,000 RPM stall. For a street car it is wise to also select a torque converter stall speed that is below the engine RPM at 65 MPH to prevent excessive heat build up.
When does the torque converter clutch turn off?
The torque converter clutch is supposed disengage when you step on the brake pedal. It’s also supposed to turn off when the transmission begins to downshift or when the vehicle is moving below 25 mph. When people would complain about torque converter clutch problems and the 125C was installed we ran a quick test.
What are the conditions for the converter clutch to apply?
For the converter clutch to apply, two conditions must be met: Internal transmission fluid pressure must be correct. The ECM must complete a ground circuit to energize the TCC solenoid that moves a check ball in the fluid line. This allows the converter clutch to apply when hydraulic pressure is correct.
The lockup converter clutch assembly is controlled by the engine computer or transmission control module depending on the model and the year of the vehicle. The control module energizes the relay which then sends 12 V to the lockup solenoid.