F 150 4WD Pickup V8-5.4L CNG VIN M (2001)
Starter Drive/Bendix: Testing and Inspection
1. Check the wear patterns on the (A) starter drive and the (B) flywheel ring gear. If the wear pattern is normal, install the starter motor.
2. If the (A) starter drive gear and the flywheel ring gear are not fully meshing or the gears are (B) milled or damaged, replace the starter motor.
Replace the flywheel ring gear.