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Home >> Chevrolet >> 2007 >> Chevy Express G2500, Van Cargo, 6.6 6 >> Repair and Diagnosis >> Transmission >> Hydraulic Diagrams >> Automatic Transmission - 4L80-E/4L85-E - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis >> Diagnostic Information And Procedures >> First Gear Only - D4

First Gear Only - D4

First Gear Only - D4

Checks Cause
Sun Gear Shaft (649) Broken shaft or broken splines
AT Output Speed Sensor Assembly (22) Reads zero
Check for DTCs.
AT Input Speed Sensor Assembly (22) Reads zero
Check for DTCs.
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