Torque Converter Inlet Relief Valve
The inlet relief valve controls the maximum oil pressure to the torque converter. The inlet relief valve prevents damage to torque converter components when the engine is started and the oil is cold. The inlet relief valve limits the maximum pressure to the torque converter to approximately 900 kPa (130 psi). This pressure is not adjustable. When the pressure exceeds 900 kPa (130 psi), the oil is dumped to the bevel gear case.
The torque converter inlet relief valve is located between the priority valve and the bevel gear case.
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| Illustration 1 | g00288312 |
Torque converter inlet relief valve | |
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| Illustration 2 | g00288313 |
Location of the torque converter inlet relief valve (1) Torque converter inlet relief valve in bevel gear case | |
Torque Converter Outlet Relief Valve
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| Illustration 3 | g00288314 |
Components of the outlet relief valve (2) Valve body (3) Passage (inlet) (4) Pressure tap (5) Passage (outlet) (6) Spring (7) Spring (8) Shims (9) Valve spool | |
The outlet relief valve for the torque converter is fastened to the torque converter housing. The outlet relief valve maintains the pressure in the torque converter.
The setting of the outlet relief valve is about 290 kPa (42 psi). From the outlet relief valve, the oil flows through outlet passage (5) to the power train oil cooler.
Oil flows into valve body (2) through inlet passage (3). The oil moves valve spool (9) against the force of springs (6) and (7). When the pressure of the oil becomes greater than the force of the springs, the movement of valve spool (9) allows the oil to flow through outlet passage (5).
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| Illustration 4 | g00288315 |
Location of the torque converter outlet relief valve (8) Torque converter outlet relief valve | |