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:

- Test the solenoid valve function with the HDS.
- Inspect the A/T clutch pressure control solenoid valve body gasket, the ATF feed pipes, and the O-rings for wear and damage.
- Check the input shaft (mainshaft) speed sensor and the 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.
- Check the ATF strainer for debris. If the strainer is clogged with particles of steel or aluminum, inspect the ATF pump. If the ATF pump is OK, find the damaged components that caused the debris. If no cause for contamination is found, replace the torque converter.