Functional Inspection 1

Functional inspection 1 is a mechanical system inspection for both the left and right side gerotor pumps, pistons, and clutch packs and will assist in determining if:

• The clutch pump check valve is in the "open" position.
• The left and right side gerotor pumps have the ability to "pull" fluid from the sump and send pressurized fluid to the left and right side clutch pack pistons.
• The left and right side pistons will engage the specific side clutch packs.
• There is a mechanical connection between the rear differential ring and pinion, the drive shaft, the transfer case, and the transmission assembly.

Raise the vehicle on a hoist. Lift the vehicle in a manner that will allow all 4 wheels to rotate during testing. Start the engine. Move the gear shift lever to Neutral. Rotate, by hand, a rear wheel in a forward direction. If the All-Wheel Drive (AWD) system mechanical components are functioning properly, the front wheels will rotate at the same speed. Rotate, by hand, the opposite side rear wheel. If the All-Wheel Drive (AWD) system mechanical components are functioning properly, the front wheels will rotate at the same speed. Failure of the front wheels to rotate during this test may indicate a "closed" clutch pump check valve, malfunctioning gerotor pump, piston, clutch pack, or valves internal to the unit.