Dodge 2001 Ram 1500 Owner's Manual page 1907

21 - 272 AUTOMATIC TRANSMISSION - 42RE
VALVE BODY (Continued)
KICKDOWN LIMIT VALVE
The purpose of the limit valve is to prevent a 3-2
downshift at higher speeds when a part-throttle
downshift is not desirable. At these higher speeds
only a full throttle 3-2 downshift will occur. At low
road speeds (Fig. 253) the limit valve does not come
into play and does not affect the downshifts. As the
vehicle's speed increases (Fig. 254), the governor
pressure also increases. The increased governor pres-
sure acts on the reaction area of the bottom land of
Fig. 253 Kickdown Limit Valve-Low Speeds
Fig. 254 Kickdown Limit Valve-High Speeds
the limit valve overcoming the spring force trying to
push the valve toward the bottom of its bore. This
pushes the valve upward against the spring and bot-
toms the valve against the top of the housing. With
the valve bottomed against the housing, the throttle
pressure supplied to the valve will be closed off by
the bottom land of the limit valve. When the supply
of throttle pressure has been shut off, the 3-2 part
throttle downshift plug becomes inoperative, because
no pressure is acting on its reaction area.
BR/BE