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| Illustration 1 | g00360519 |
Location of torque converter relief valves (1) Torque converter inlet relief valve (2) Torque converter outlet relief valve | |
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| Illustration 2 | g00279780 |
Torque converter inlet relief valve (1) Torque converter inlet relief valve (3) Passage to the hydraulic tank (4) Spool (5) Inlet passage (6) Shims | |
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| Illustration 3 | g00279801 |
Torque converter outlet relief valve (2) Torque converter outlet relief valve (7) Shims (8) Inlet passage (9) Spool (10) Outlet passage to the torque converter and front brake cooling screen | |
Torque converter inlet relief valve (1) and torque converter outlet relief valve (2) are installed on the outside of the torque converter housing. The operation of both valves is identical.
Inlet relief valve (1) controls the maximum pressure of the oil that is flowing to the torque converter. The oil supply comes from the torque converter charging section of the oil pump. The oil comes through the torque converter hydraulic filter. The inlet relief valve ensures that the maximum oil pressure to the torque converter does not exceed approximately 930 ± 35 kPa (135 ± 5 psi).
| NOTICE |
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With cold oil, inlet pressure going to the torque converter must not exceed 930 kPa (135 psi). Pressure that is greater than the maximum setting will damage the torque converter. |
Torque converter outlet relief valve (2) controls the maximum pressure of the oil that is inside the torque converter. Oil comes from the torque converter through passage (8). The oil then flows past spool (9). The oil then exits through passage (10). The outlet oil goes through the torque converter and front brake cooling screen. The oil then goes to the torque converter and front brake cooling diverter valve. The diverter valve sends the oil through the torque converter and front brake cooling oil cooler or around the oil cooler. The oil will flow through the front brakes. The oil then returns to the hydraulic tank.
The outlet relief valve ensures that the pressure of the oil that is inside the torque converter does not exceed 550 kPa (80 psi).