626 LX L4-2.0L DOHC (1999)
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LOW/REVERSE CLUTCH HYDRAULIC CIRCUITS OPERATION
The LA4A-EL transaxle has hydraulic circuits for the control of the low/reverse clutch. The low/reverse clutch is applied in the R position and 1
range/first gear.
R POSITION
The path of fluid under line pressure during the application of the low/reverse clutch in the R position is as follows:
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From the manual valve into the R circuit
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From the R circuit in several directions:
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To the bypass clutch control valve to prevent torque converter clutch application
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Through 1-2 shift valve to the RC Circuit
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From the low/reverse valve, through the LRC circuit, to the low/reverse clutch
As pressure in the LRC circuit builds, it first strokes the low/reverse clutch piston and then the pressure buildup is modulated by the accumulator.
If the PCM detects that a shift into the R position is occurring above a specified vehicle speed, it causes a lockout by turning SS1 to ON to move the
1-2 shift valve. When this occurs, the R circuit feed is blocked and the low/reverse clutch and accumulator have a path to exhaust through the 1-2 shift
valve until SS1 is turned OFF.
When the manual valve moves from the R position, it provides an exhaust path for the R circuit.