GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Generic 🢒 2002 🢒 Unit Repair 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L80-E 🢒 First Gear Only - D4

First Gear Only - D4 for Generic Unit Repair 2002

First Gear Only

Checks

Cause

Sun Gear Shaft (649)

Broken shaft or broken splines

A/T Output Speed Sensor Assembly (22)

Reads zero - Check for DTCs

A/T Input Speed Sensor Assembly (22)

Reads zero - Check for DTCs