Transmission Does Not Shift

Transmission does not shift

Diagnostic Procedure:

1. Input shaft (mainshaft) speed sensor defective

2. Output shaft (countershaft) speed sensor defective

Also check for:

- Check for a stored DTC, and check for loose connections.
- Check the input shaft (mainshaft) speed sensor and output shaft (countershaft) speed sensor installation.
- Inspect the sensor O-ring for wear and damage.