Shift Solenoid
A shift solenoid is an electrically operated valve in an automatic transmission that controls fluid flow to change gears.
What is Shift Solenoid?
Each solenoid opens or closes a fluid path in the valve body when the transmission control unit sends current to it. Some are simple on/off valves; pressure control solenoids vary the pressure smoothly for softer shifts. Their resistance can be measured, and many transmission codes point directly to a specific solenoid circuit.
How it works
The control unit energises the solenoid, a plunger moves, and fluid is directed to engage or release a clutch pack.
Why it matters for your car
A failed solenoid can cause the gearbox to skip gears, stay in one gear or shift roughly. Wiring and connector faults inside the gearbox are common and should be ruled out before replacing parts.
Other terms
- Brake Bedding-in
- Brake Dust
- Clay Bar (Paint Decontamination)
- Cup Holder
- Decibel (dB)
- Hydrogen Combustion Engine
- Manufacturer Oil Approval
- Miller Cycle
- Occupant Classification Sensor
- Parasitic Drain
- Range Anxiety
- Retreaded Tyre
- Side Airbag
- Side Impact Crash Test
- Tar Remover
- Threshold Braking
- Tow Eye (Towing Hook)
- Trim Removal Tools
- Type 2 Connector
- Vapour Lock