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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1467 (Automatic Transmission, 4L60-E/4L65-E (Troubleshooting)) >> Diagnostic Information and Procedures >> First Gear Range Only - No Upshift

First Gear Range Only - No Upshift

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
1st Gear Range Only - No Upshift

Checks Causes
Control Valve Body (60)
  • The 1-2 Shift valve is sticking
  • The spacer plate or gaskets are mispositioned or damaged
Case (103) The case to valve body face is damaged or is not flat
Shift Solenoid Valves (366/368)
  • Stuck or damaged
  • Faulty electrical connection
2-4 Servo Assembly (13-28)
  • The apply passage case is restricted or blocked
  • Nicks or burrs on the servo pin or on the pin bore in the case
  • Fourth servo piston is installed backwards
2-4 Band Assembly (602)
  • The 2-4 band is worn or damaged
  • The band anchor pin is not engaged
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