Excessive Shock or Flares on 3-4 Upshift or 4-3 Downshift

Excessive shock or flares on 3-4 upshift or 4-3 downshift

Shift solenoid valve B 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 C (4th clutch) defective

Shift fork shaft stuck

Foreign material in separator plate orifice

Shift valve C defective

Reverse inhibitor valve defective

D inhibitor valve defective

A/T clutch pressure control solenoid valve B accumulator defective

A/T clutch pressure control solenoid valve C accumulator defective

3rd air check valve stuck

4th/reverse air check valve stuck

3rd clutch defective

4th clutch defective

Clearance between clutch end-plate and top disc incorrect

Notes

Inspect the shift solenoid valve B function with the HDS Shift Solenoid Valve A and B Test.

Notes

Check for a seized shift solenoid valve, and inspect the O-rings.

Notes

Inspect A/T clutch pressure control solenoid valve A with the HDS A/T Clutch Pressure Control Solenoid Valve A, B, C, and D Test.

Notes

Inspect A/T clutch pressure control solenoid valve B with the HDS A/T Clutch Pressure Control Solenoid Valve A, B, C, and D Test.

Notes

Inspect A/T clutch pressure control solenoid valve C with the HDS A/T Clutch Pressure Control Solenoid Valve A, B, C, and D Test.

Notes

Test the 4th clutch transmission fluid pressure switch operation with the HDS.

Notes

Check for a missing shift fork bolt on the shift fork shaft.

Notes

Check the shift fork shaft detent for wear and damage.

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 shift valve C, the reverse inhibitor valve, and the D inhibitor valve in the main valve body for free movement. If the valves does not move, replace the main valve body.

Notes

Check the 3rd and 4th clutch pressures A/T Pressure Test.

Notes

Inspect the clutch clearance for the 3rd and 4th clutches.

Notes

Replace the secondary valve body.

Notes

Check the 3rd air check valve (ball) in the stator shaft support for a stuck ball. If the check valve (ball) is stuck, replace the 3rd air check valve.

Notes

Check the 4th/reverse air check valve (ball) in the main valve body for a stuck ball. If the check valve (ball) is stuck, replace the 4th/reverse air check valve.