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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 6L50/6L80/6L90 - DTC P0218 To DTC P0971 >> DTC P0776 or P0777 >> Component Testing

Component Testing

Operating the transmission in the following condition will verify the PC solenoid or a portion of the hydraulic control circuit is not functioning as it should.

Transmission Operating Conditions Transmission Condition if PC Sol. 2 is Stuck Off
Steady State: Gears 3rd or 5th Neutral
Garage Shift: Park/Neutral to Reverse/Drive Neutral
Downshift: from gears 6th, 5th, 4th to 5th or 3rd Neutral
Transmission Operating Conditions Transmission Condition if PC Sol. 2 is Stuck On
Steady State: Gears 1st, 2nd, 4th, or 6th 3rd or 5th
Garage Shift: Park/Neutral to Reverse/Drive 1st (Engine Braking)
Downshift: from gears 4th, 5th, 6th to 3rd or 5th 3rd or 5th
Upshift: from gears 3rd, 5th to 4th, 5th, or 6th 3rd or 5th