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Home >> Cadillac >> 2004 >> CTS Base, 3.2 N >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Automatic Transmission Troubleshooting) >> Troubleshooting >> No Fourth Gear, or Slips in Fourth Gear

No Fourth Gear, or Slips in Fourth Gear

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No Fourth Gear, or Slips in Fourth Gear

Check Causes
DEFINITION: A large engine RPM is noted in fourth gear or no vehicle forward speed increase. Shifts into fourth gear are soft or do not occur.
Control Valve Body Accumulator Assembly
  • 3-4 shift valve stuck applied
  • 3-4 shift control valve stuck applied
Direct and Reverse Clutch
  • Damaged or worn piston (406)
  • Damaged or worn clutch plates
  • Damaged ball check valve (405)