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HOMESERVICE MANUALSCHEVROLET2001CHEVY EXPRESS G2500, VAN PASSENGER EXTENDED, 5.0 MREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 755 (AUTOMATIC TRANSMISSION, 4L60-E/4L65-E (TROUBLESHOOTING))TROUBLESHOOTINGNO 3-4 SHIFT, SLIPS OR ROUGH 3-4 SHIFT
2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 M

No 3-4 Shift, Slips or Rough 3-4 Shift

2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 MSECTION No 3-4 Shift, Slips or Rough 3-4 Shift
WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
No 3-4 Shift/Slipping or Rough 3-4 Shift

Checks Causes
Oil Pump Assembly (4)
  • Pump cover retainer and ball assembly omitted or damaged
  • Faces not flat
Valve Body Assembly (60)
  • Valves stuck
    • 2-3 Shift valve train
    • Accumulator valve
    • 1-2 Shift valve train
    • 3-2 Shift solenoid valve assembly
  • Spacer plate or gaskets incorrect, mispositioned or damaged
2-4 Servo Assembly (13-28)
  • Incorrect band apply pin
  • Missing or damaged servo seals
  • Porosity in piston, cover or case
  • Damaged piston seal grooves
  • Plugged or missing orifice cup plug
Case (103)
  • 3rd Accumulator retainer and ball assembly leaking
  • Porosity in 3-4 accumulator piston or bore
  • 3-4 Accumulator piston seal or seal grooves damaged
  • Plugged or missing orifice cup plug
  • Restricted oil passage
Input Housing Assembly (621) Refer to No 2-3 Shift or 2-3 Shift Slips, Rough or Hunting .
2-4 Band Assembly (602) Worn or misassembled
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.