1995 JEEP CHEROKEE Service Repair Manual

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Page 1545 of 2198

JEEP CHEROKEE 1995 Service Repair Manual The overdrive input shaft and planetary carrier ro-
tate as a unit. The sun gear and overdrive direct
clutch drum are in mesh and operate as a single
unit. The direct clutch splines function as the hu

Page 1546 of 2198

JEEP CHEROKEE 1995 Service Repair Manual The rear planetary ring gear is splined to the out-
put shaft. The front planetary carrier and rear car-
rier ring gear are meshed and rotate as a unit with
the output shaft.
GEARTRAIN OPERATION AND A

Page 1547 of 2198

JEEP CHEROKEE 1995 Service Repair Manual The manual valve, 1-2 shift valve, primary regula-
tor valve, accumulator control valve, check balls, so-
lenoids and oil strainers are located in the lower
body section (Fig. 10). The remaining contr

Page 1548 of 2198

JEEP CHEROKEE 1995 Service Repair Manual Throttle Valve and Downshift Plug
The throttle valve and downshift plug (Fig. 14) con-
trol throttle pressure to the primary regulator valve.
The downshift plug and throttle valve are operated
by the

Page 1549 of 2198

JEEP CHEROKEE 1995 Service Repair Manual Secondary Regulator Valve
The secondary regulator valve (Fig. 16) regulates
converter clutch and transmission lubrication pres-
sure. When primary regulator valve pressure exceeds
requirements for clu

Page 1550 of 2198

JEEP CHEROKEE 1995 Service Repair Manual When the transmission control module deactivates
the solenoid, line pressure at the top of the valve
moves the valve down closing the second brake accu-
mulator feed port. As the solenoid is activated

Page 1551 of 2198

JEEP CHEROKEE 1995 Service Repair Manual at the top of the 3-4 valve to be released through the
solenoid valve drain port. Spring tension moves the
valve up exposing the overdrive clutch accumulator
feed port to apply the clutch.
De-energizi

at the top of the 3-4 valve to be released through the
solenoid valve drain port. Spring tension moves the
valve up exposing the overdrive clutch accumulator
feed port to apply the clutch.
De-energizing the solenoid causes the drain port to
close. Line pressure then moves the valve down ex-
posing the overdrive brake accumulator feed port for
the shift to fourth gear.
In the 1-2 or 3 gearshift lever positions, line pres-
sure from the 2-3 shift valve is applied to the lower
end of the 3-4 valve. This holds the valve upward,
closing off the overdrive brake feed port preventing a
shift into fourth gear.
Second Coast Modulator Valve
The second coast modulator valve (Fig. 21) momen-
tarily reduces line pressure from the 1-2 shift valve.
This cushions application of the second coast brake.
The valve is operative when the shift lever and man-
ual valve are in the 3 position.
Low Coast Modulator Valve
The low coast modulator valve (Fig. 22) momen-
tarily reduces line pressure from the 2-3 shift valve;
this action cushions application of the first/reverse
brake. The modulator valve operates when the shift
lever and manual valve are in the 1-2 position.
Accumulator Control Valve
The accumulator control valve (Fig. 23) cushions
clutch and brake application. This is achieved by re-
ducing back pressure to the accumulators when
throttle opening is small. The valve is operated by
line and throttle pressure.Accumulators
Four accumulators are used to cushion clutch and
brake application. The accumulators (Fig. 24), consist
of spring loaded pistons. The pistons dampen the ini-
tial surge of apply pressure to provide smooth en-
gagement during shifts.
Control pressure from the accumulator control
valve is continuously applied to the back pressure
side of the accumulator pistons. This pressure plus
spring tension holds the pistons down. As line pres-
sure from the shift valves enters the opposite end of
the piston bore, control pressure and spring tension
momentarily delay application of full line pressure to
Fig. 21 Second Coast Modulator Valve
Fig. 22 Low Coast Modulator Valve
Fig. 23 Accumulator Control Valve
21 - 174 AW-4 AUTOMATIC TRANSMISSIONJ

Page 1552 of 2198

JEEP CHEROKEE 1995 Service Repair Manual cushion engagement. The accumulators are all lo-
cated in the transmission case (Fig. 24).
Transmission Valve Body Solenoids
Three solenoids are used (Fig. 25). The No. 1 and 2
solenoids control shift

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