Excessive Shock or Flares on All Upshifts and Downshifts

Excessive shock or flares on all upshifts and downshifts

Diagnostic Procedure:

1. A/T clutch pressure control solenoid valve B defective

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

3. Input shaft (mainshaft) speed sensor defective

4. Output shaft (countershaft) speed sensor defective

5. ATF temperature sensor defective

6. Foreign material in separator plate orifice

Also check for:

- Check for a stored DTC, and check for loose connections.
- Test the solenoid valve function with the HDS.
- Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings for wear and damage.
- Check the input shaft (mainshaft) speed sensor and output shaft (countershaft) speed sensor installation.
- 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.