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Home >> Saturn >> 2010 >> Sky Base, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Automatic Transmission - 5L40-E/5L50-E - Symptom Troubleshooting And Diagnosis) >> No First Gear

No First Gear

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No 1st Gear

Check Causes
DEFINITION: A large engine RPM increase is noted in first gear, Drive range, with little or no vehicle forward speed increase. Second, third, and fourth gear operation are normal. Shifts into first gear are soft or do not occur.
Control Valve Body Accumulator Assembly
  • 1-2 shift control valve stuck released
  • 1-2 shift valve stuck released
  • 1-2 SS valve stuck ON
Forward and Low Clutch Sprag
  • Damaged sprag
  • Worn or pitted inner race
Forward Clutch Assembly Damaged
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