Dodge RAM 1500 1998 Owner's Manual page 1975

21 - 272 AUTOMATIC TRANSMISSION - 48RE
VALVE BODY (Continued)
OPERATION
NOTE: Refer to the Hydraulic Schematics for a
visual aid in determining valve location, operation
and design.
CHECK BALLS
CHECK BALL NUMBER
1
3
4
5
6
7
8
9
10
Allows either the manual valve to put line pressure on the 1-2 governor plug or
the KD Valve to put WOT line pressure on the 1-2 governor plug.
Allows either the Reverse circuit or the 3rd gear circuit to pressurize the front
clutch.
Allows either the Manual Low circuit from the Manual Valve or the Reverse
from the Manual Valve circuit to pressurize the rear servo.
Directs line pressure to the spring end of the 2-3 shift valve in either Manual
Low or Manual 2nd, forcing the downshift to 2nd gear regardless of governor
pressure.
Provides a by-pass around the front servo orifice so that the servo can release
quickly.
Provides a by-pass around the rear clutch orifice so that the clutch can release
quickly.
Directs reverse line pressure through an orifice to the throttle valve eliminating
the extra leakage and insuring that Reverse line pressure pressure will be
sufficient.
Provides a by-pass around the rear servo orifice so that the servo can release
quickly.
Allows the lockup clutch to used at WOT in 3rd gear by putting line pressure
from the 3-4 Timing Valve on the interlock area of the 2-3 shift valve, thereby
preventing a 3rd gear Lock-up to 2nd gear kickdown.
DESCRIPTION
DR