Valve Body
The hydraulic control centre of an automatic transmission — a casting containing dozens of precisely fitted spool valves through which the solenoids direct pressure to the clutches. Because the valves run directly in the aluminium bore with no separate bushing, they wear the bore oval over time, and the resulting leakage produces delayed or slipping engagement that looks exactly like worn clutches while the clutches are fine. This is the part behind a large share of shift complaints on high-mileage automatics, and it is repairable — oversized valves and sleeve kits exist — which makes distinguishing it from internal wear worth real money.
Also known as: valvebody, hydraulic control unit, mechatronic, mechatronics, shift valve body, control valve body
Referenced by 334 codes
Codes involving this component (334)
- P0893 Multiple Gears Engaged Stop driving Critical
- P0701 Transmission Control System Range/Performance High
- P0729 Gear 6 Incorrect Ratio High
- P0730 Incorrect Gear Ratio High
- P0731 Gear 1 Incorrect Ratio High
- P0732 Gear 2 Incorrect Ratio High
- P0733 Gear 3 Incorrect Ratio High
- P0735 Gear 5 Incorrect Ratio High
- P0736 Reverse Incorrect Ratio High
- P0742 Torque Converter Clutch Circuit Stuck On High
- P0745 Pressure Control Solenoid A High
- P0746 Pressure Control Solenoid A Performance or Stuck Off High
- P0747 Pressure Control Solenoid A Stuck On High
- P0749 Pressure Control Solenoid A Intermittent High
- P0750 Shift Solenoid A High
- P0751 Shift Solenoid A Performance or Stuck Off High
- P0752 Shift Solenoid A Stuck On High
- P0755 Shift Solenoid B High
- P0756 Shift Solenoid B Performance or Stuck Off High
- P0757 Shift Solenoid B Stuck On High
- P0760 Shift Solenoid C High
- P0761 Shift Solenoid C Performance or Stuck Off High
- P0762 Shift Solenoid C Stuck On High
- P0765 Shift Solenoid D High
- P0766 Shift Solenoid D Performance or Stuck Off High
Other components in Transmission
- Transmission Control Module 485
- Transmission Fluid 308
- Pressure Control Solenoid 181
- Shift Solenoid 167
- Clutch Pack 122
- Clutch Actuator 89
- Shift Fork 72
- Gear Shift Actuator 72
- Transmission Fluid Pressure Sensor 70
- Electric/Auxiliary Transmission Fluid Pump 67
- Gear Lever Position Sensor 65
- Transmission Range Sensor 58
- Gear Shift Module 58
- Power Take-Off Unit 42
- Park/Neutral Switch 40
- Transmission Fluid Temperature Sensor 33
- Clutch Position Sensor 29
- Torque Converter 28
- Transmission Mode Switch 24
- Engine Disconnect Clutch 22
- Transmission Fluid Pump 22
- Transmission Fluid Filter 19
- Torque Converter Clutch Solenoid 17
- Output Speed Sensor 16
- Clutch 15
- Four Wheel Drive Switch 14
- Hydraulic Power Unit 14
- Four-Wheel Drive Clutch Control Module 14
- Manual Shift Switch 13
- Gate Select Actuator 13
- Transfer Case 11
- Intermediate Shaft Speed Sensor 10
- Shift Lock Solenoid 10
- Transfer Case Control Module 10
- Hydraulic Pressure Sensor 8
- Turbine Speed Sensor 7
- Skip Shift Solenoid 5
- Hydraulic Oil Temperature Sensor 5
- Transmission Fluid Cooler 4
- Reverse Inhibit Solenoid 4
- Driveline Disconnect Switch 4
- Reverse Light Switch 2
- Synchroniser 2
Information, not instruction
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