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Abrupt 1-2 Upshift

Checks

Causes

Transmission Fluid Temperature (TFT) Sensor

Inspect for a faulty TFT sensor.

Pressure Control Solenoid Valve

Inspect for a malfunction of the pressure control solenoid valve.

Throttle Position Sensor

Inspect for a malfunction of the throttle position sensor.

Throttle Angle

Adjust the throttle angle of the throttle position sensor.

Transmission Control Module (TCM)

Inspect for a faulty TCM.

2-4 Brake Band

Inspect for an incorrect adjustment of the 2-4 brake band.

1-2 Accumulator

Inspect for a malfunction of the 1-2 accumulator.

Oil Pump

Inspect for a broken or damaged oil pump.

Control Valve Spool

Inspect for a malfunction of the control valve spool.

   


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