Transmission Does Not Shift

Transmission does not shift

Input shaft (mainshaft) speed sensor defective

Output shaft (countershaft) speed sensor defective

Engine output low

Notes

Check the speed sensor installation.

Notes

Inspect the sensor O-ring for wear and damage.

Notes

Check the fuel pressure Testing and Inspection.

Notes

Check for exhaust restriction.

Notes

Check for intake restriction.

Notes

Check the engine rocker arms.