Late Shift After Shifting From N to D, or Excessive Shock When Shifting

Late shift after shifting from N to D, or excessive shock when shifting

Diagnostic Procedure:

1. Shift solenoid valve A defective

2. Shift solenoid valve B defective

3. Shift solenoid valve C defective

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

5. Shift cable broken or out of adjustment

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

7. ATF temperature sensor defective

8. CPC valve C stuck

9. ATF strainer clogged

10. Foreign material in separator plate orifice

11. Shift valve A defective

12. Shift valve D defective

13. Servo control valve defective

14. 1st accumulator defective

15. 2nd accumulator defective

16. 1st check ball stuck

17. 1st clutch defective

18. Clearance between the clutch end-plate and the top disc is incorrect

Also check for:

- Check for a stored DTC, and check for loose connections.
- Inspect shift solenoid valve function with the HDS.
- Check for a seized shift solenoid valve, and inspect the O-rings.
- Inspect A/T clutch pressure control solenoid valve with the HDS.
- Inspect A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings for wear and damage.
- Check for a loose shift cable at the shift lever and the selector control lever.
- Inspect the 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 stall speed.
- Check the line pressure.
- 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.
- Check the 1st clutch pressure.
- 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, damage, and peeling. 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 wave-plate height is out of the tolerance, replace the 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.