M: Speed Indicator Jumps Up And Down Erratically

Pinpoint Test M - Speed Indication Jumps Up And Down Erratically

M1 - Check Speed Sensor Drive Gear
- Remove vehicle speed sensor from transmission.
- Check that all gear teeth are in good condition, retainer clip is installed and gear does not slip on shaft.

Is vehicle speed sensor in good condition?

YES GO to L3.
NO REPLACE drive gear and/or retaining clip. RESTORE vehicle. RETEST system.