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Home >> Jeep >> 2018 >> Grand Cherokee Laredo, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (8HP70 Automatic Transmission (Service Information)) >> Pump, Transmission Oil >> Operation

Pump, Transmission Oil: Operation

WARNING: This page is about a different variant/trim than selected.
GC0152296Courtesy of CHRYSLER GROUP, LLC
1- SYSTEM PRESSURE VALVE 2 - PUMP
3 - INTAKE PIPE 4 - SUMP
5 - PRESSURE PIPE 6 - RETURN OF REDUNDANT OIL

The transmission oil pump is driven by a chain and sprocket. The oil pump has two intake ports and two exhaust ports. The pump draws fluid through a filter and pressurizes the fluid as the pump rotates. After the fluid is pressurized, it exits the pump through two exhaust ports that feed the system pressure valve. The system pressure valve maintains fluid pressure and allows excess pressure to return to the pump. This reduces cavitation and noise.