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Home >> Chevrolet >> 2005 >> Chevy Express H1500, Van Passenger >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Automatic Transmission - 4L80-E/4L85-E - Service, Diagnosis & Trouble Shooting) >> Troubleshooting >> Oil Out the Vent Tube

Oil Out the Vent Tube

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Oil Out the Vent Tube

Checks Cause
Pump Cover (206) Cross channel leakage can pressurize the vent area.
Fluid
  • Foaming and filling the pump vent ports
  • Transmission is overfilled.
Transmission Overheated