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| Illustration 1 | g00278631 |
Flow Control Valve (1) Passage to transmission hydraulic control. (2) Passage to torque converter. (3) Port holes to torque converter. (4) Spring. (5) Piston. (6) Orifice. (7) Passage from oil filter. | |
The flow control valve has two functions. Limit the oil flow that enters the transmission hydraulic control to 23 L/min (6 US gpm) and direct the remaining flow to the torque converter circuit. The controlled flow provides a constant fill time for the clutches through the entire engine speed range.
The oil flow across orifice (6) through passage (1) to the transmission hydraulic control remains constant because spring (4) exerts a constant force on piston (5). This creates a constant differential pressure across orifice (6). Piston (5) directs the remaining flow to the torque converter circuit. This is done by metering on port holes (3) to the torque converter.
The flow control valve is located in the transmission case beneath the transmission hydraulic control. The flow control valve is under the fitting in the return line from the oil filter.