Can a TCC regulator be replaced on a 4R44E?
If line rise is poor because of a dirty EPC solenoid or leakage within that circuit, then feed to the TCC regulator valve will be poor (the solenoid can be replaced with [56842B-01]). The EPC circuit wears and leaks at multiple locations, but it also has an EPC and engagement control valve that sticks (and can be replaced with ( 37947-11K ).
How does the TCC regulator control the slip rpm?
The TCC regulator valve is designed to limit apply pressure to protect the converter piston. The bore for this valve wears and apply pressure is reduced, so the TCC percentage you saw on the scanner can no longer control the slip RPM. On a road test, TCC slip is available with a scanner, seen as TCCMACT RPM.
What causes a clutch leak on a 4R44E?
Leakage at the coast clutch valve can result in loss of 4th, 5th, or engine braking (you can eliminate leakage with 37947-33K ). When you examine this valve body (see Figure 2 ), you see the many “L” retainers.
What is the diagnostic code for Honda transmission lock up?
Diagnostic trouble code P0740 is detected when TCM detects an improper voltage drop when it tries to operate the solenoid valve.
What does lock up clutch do on Honda?
Lock-up piston operation will then be controlled. When the torque converter clutch solenoid valve is activated, the torque converter lockup clutch will engage creating a 1 to 1 RPM ratio between the transmission input shaft and the rotational speed of the torque converter.
How is the torque converter clutch solenoid valve activated?
The torque converter clutch solenoid valve is activated, with the gear in D4, by the Transmission Control Module (TCM) in response to signals sent from the vehicle speed and the Engine Control Module ( ECM ). Lock-up piston operation will then be controlled.
The TCC regulator valve is designed to limit apply pressure to protect the converter piston. The bore for this valve wears and apply pressure is reduced, so the TCC percentage you saw on the scanner can no longer control the slip RPM. On a road test, TCC slip is available with a scanner, seen as TCCMACT RPM.