Delayed Engagement After Shifting From N to D or S, or Excessive Shock When Shifting

Delayed engagement after shifting from N to D or S, or excessive shock when shifting

Diagnostic Procedure:

1. Worn engine or transmission mounts

2. Shift solenoid valve A defective

3. Shift solenoid valve B defective

4. Shift solenoid valve C defective

5. A/T clutch pressure control solenoid valve C defective

6. Shift cable broken or out of adjustment

7. Connection between shift cable and transmission or shift lever is worn

8. ATF temperature sensor defective

9. CPC valve C stuck

10. ATF strainer clogged

11. Foreign material in separator plate orifice

12. Shift valve A defective

13. Shift valve D defective

14. Servo control valve defective

15. 1st accumulator defective

16. 2nd accumulator defective

17. 1st check ball stuck

18. 1st clutch defective

19. Clearance between clutch end-plate and top disc incorrect

Also check for:

- Check engine and transmission mounts.
- Check for a stored DTC, and check for loose connections.
- Test the shift solenoid valves with the HDS. A/T Shift Solenoid Valve Test, Replacement, and Shift Solenoid Wire Harness Replacement
- Check for a seized shift solenoid valve, and inspect the O-rings.
- Test the A/T clutch pressure control solenoid valves with the HDS. A/T Clutch Pressure Control Solenoid Valve A and B Test
- Check the stall speed. A/T Stall Speed Test
- Check the line and 1st clutch pressures. A/T Pressure Test
- Inspect the A/T clutch pressure control solenoid valve body gasket, the ATF feed pipes, and the O-rings for wear and damage.
- Check for a loose shift cable at the shift lever and the transmission control lever.
- Inspect the ATF temperature sensor O-ring for wear and damage.
- Check for a clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice.
- Check the ATF strainer for debris. If the strainer is clogged, find the damaged components that caused the debris. If no cause for contamination is found, replace the torque converter.
- Check CPC valve C in the secondary valve body for free movement, and check the valve spring for wear and damage.
- Check shift valve A in the main valve body for free movement, and check the valve spring for wear and damage.
- Check shift valve D in the secondary valve body for free movement, and check the valve spring for wear and damage.
- Inspect the 1st clutch for wear and damage.
- Inspect the clutch piston, the clutch piston check valve, and the 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 the plates for wear and damage, and inspect the clutch wave-plate height. If the discs and the plates are worn or damaged, replace them as a set. If the clutch wave-plate height is out of the tolerance, replace the clutch wave-plate. If they are OK, adjust the clearance with the clutch end-plate.
- Check the 1st and 2nd accumulator pistons, the O-rings, and the springs in the accumulator body for wear and damage.
- Check for a stuck 1st check ball in the secondary valve body.