Excessive Shock or Engine Revs Up Abnormally High on 1-2 Upshift or 2-1 Downshift (A/T)

Excessive shock or engine revs up abnormally high on 1-2 upshift or 2-1 downshift

Shift solenoid valve D defective

A/T clutch pressure control solenoid valve A defective

A/T clutch pressure control solenoid valve B defective

A/T clutch pressure control solenoid valve C defective

Transmission fluid pressure switch A (2nd clutch) defective

Foreign material in separator plate orifice

1st accumulator defective

2nd accumulator defective

1st check ball stuck

2nd check ball stuck

Lock-up shift valve defective

1st clutch defective

2nd clutch defective

Notes

Check for a stored DTC, and check for loose connections.

Notes

Test the solenoid valve function with the HDS.

Notes

Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings for wear and damage.

Notes

Inspect the shift solenoid valve O-rings, and check for shift solenoid valve for seizure.

Notes

Check for a clogged orifice in the transmission fluid pressure switch A (2nd clutch). If the orifice is clogged, remove it and clean the pressure switch.

Notes

Check for a clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice.

Notes

Check the 1st and 2nd clutch pressures.

Notes

Inspect the 1st accumulator piston, O-ring, and spring for wear and damage in the servo body.

Notes

Inspect the 2nd accumulator piston, O-ring, and spring for wear and damage in the servo body.

Notes

Check the 1st check ball and 2nd check ball for being stuck in the main valve body.

Notes

Inspect the secondary shaft, 1st clutch, and 2nd clutch for wear and damage.

Notes

Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch wave-plate height. If the discs and plates are worn or damaged, replace them as a set. If the wave-plate height is out of tolerance, replace the wave-plate. If they are OK, adjust the clearance with the clutch end-plate.

Notes

Inspect the 2nd clutch feed pipe. If the 2nd clutch feed pipe is scored, replace the end cover.

Notes

Replace the secondary shaft if the bushing for the 2nd clutch feed pipe is loose or damaged.

Notes

Check the lock-up shift valve in the regulator valve body for free movement, and check the valve spring for wear and damage.