2001 DODGE RAM Ac control

VALVE BODY UPPER HOUSING
(1) Note location of check balls in valve body upper
housing (Fig. 294). Then remove the one large diam-
eter and the six smaller diameter check balls.(2) Remove governor plug and shuttle valve covers
(Fig. 296).
(3) Remove E-clip that secures shuttle valve sec-
ondary spring on valve stem (Fig. 295).
(4) Remove throttle plug, primary spring, shuttle
valve, secondary spring, and spring guides (Fig. 296).
(5) Remove boost valve retainer, spring and valve
if not previously removed.
(6) Remove throttle plug and 1-2 and 2-3 governor
plugs (Fig. 283).
(7) Turn upper housing around and remove limit
valve and shift valve covers (Fig. 297).
(8) Remove limit valve housing. Then remove
retainer, spring, limit valve, and 2-3 throttle plug
from limit valve housing (Fig. 297).
(9) Remove 1-2 shift control valve and spring (Fig.
297).
(10) Remove 1-2 shift valve and spring (Fig. 297).
(11) Remove 2-3 shift valve and spring from valve
body (Fig. 297).
(12) Remove pressure plug cover (Fig. 297).
(13) Remove line pressure plug, sleeve, throttle
pressure plug and spring (Fig. 297).
Fig. 294 Check Ball Locations In Upper Housing
1 - SMALL DIAMETER CHECK BALLS (6)
2 - LARGE DIAMETER CHECK BALL (1)
Fig. 295 Shuttle Valve E-Clip And Secondary Spring
Location
1 - E-CLIP
2 - SECONDARY SPRING AND GUIDES
3 - SHUTTLE VALVE
BR/BEAUTOMATIC TRANSMISSION - 42RE 21 - 289
VALVE BODY (Continued)

Fig. 297 Upper Housing Shift Valve And Pressure Plug Locations
1 - UPPER HOUSING 8 - RETAINER
2 - 1-2 SHIFT VALVE AND SPRING 9 - 1-2 SHIFT CONTROL VALVE AND SPRING
3 - 2-3 SHIFT VALVE AND SPRING 10 - PRESSURE PLUG COVER
4 - 2-3 THROTTLE PLUG 11 - LINE PRESSURE PLUG
5 - LIMIT VALVE HOUSING 12 - PLUG SLEEVE
6 - LIMIT VALVE COVER 13 - THROTTLE PRESSURE SPRING AND PLUG
7 - LIMIT VALVE AND SPRING
BR/BEAUTOMATIC TRANSMISSION - 42RE 21 - 291
VALVE BODY (Continued)

(3) Install the ECE check ball into the transfer
plate (Fig. 290). The ECE check ball is approximately
4.8 mm (3/16 in.) in diameter.
(4) Position lower housing separator plate on
transfer plate (Fig. 305).
(5) Install lower housing on assembled transfer
plate and upper housing (Fig. 306).
(6) Install and start all valve body screws by hand
except for the screws to hold the boost valve tube
brace. Save those screws for later installation. Then
tighten screws evenly to 4 N´m (35 in. lbs.) torque.
Start at center and work out to sides when tighten-
ing screws (Fig. 306).UPPER HOUSING VALVE AND PLUG
Refer to (Fig. 307), (Fig. 308) and (Fig. 309) to per-
form the following steps.
(1) Lubricate valves, plugs, springs with clean
transmission fluid.
(2) Assemble regulator valve line pressure plug,
sleeve, throttle plug and spring. Insert assembly in
upper housing and install cover plate. Tighten cover
plate screws to 4 N´m (35 in. lbs.) torque.
(3) Install 1-2 and 2-3 shift valves and springs.
(4) Install 1-2 shift control valve and spring.
(5) Install retainer, spring, limit valve, and 2-3
throttle plug from limit valve housing.
(6) Install limit valve housing and cover plate.
Tighten screws to 4 N´m (35 in. lbs.).
(7) Install shuttle valve as follows:
(a) Insert plastic guides in shuttle valve second-
ary spring and install spring on end of valve.
(b) Install shuttle valve into housing.
(c) Hold shuttle valve in place.
(d) Compress secondary spring and install E-clip
in groove at end of shuttle valve.
(e) Verify that spring and E-clip are properly
seated before proceeding.
(8) Install shuttle valve cover plate. Tighten cover
plate screws to 4 N´m (35 in. lbs.) torque.
(9) Install 1-2 and 2-3 valve governor plugs in
valve body.
(10) Install shuttle valve primary spring and
throttle plug.
(11) Align and install governor plug cover. Tighten
cover screws to 4 N´m (35 in. lbs.) torque.
Fig. 305 Lower Housing Separator Plate
1 - BE SURE TO ALIGN BORES
2 - TRANSFER PLATE
3 - LOWER HOUSING (OVERDRIVE) SEPARATOR PLATE
Fig. 306 Installing Lower Housing On Transfer Plate
And Upper Housing
1 - VALVE BODY SCREWS (13)
2 - LOWER HOUSING
3 - UPPER HOUSING
4 - TRANSFER PLATE
21 - 296 AUTOMATIC TRANSMISSION - 42REBR/BE
VALVE BODY (Continued)

Fig. 308 Upper Housing Control Valve Locations
1 - UPPER HOUSING 8 - MANUAL VALVE
2 - REGULATOR VALVE 9 - 1-2 GOVERNOR PLUG
3 - SWITCH VALVE 10 - GOVERNOR PLUG COVER
4 - REGULATOR VALVE SPRING 11 - THROTTLE PLUG
5 - KICKDOWN VALVE 12 - 2-3 GOVERNOR PLUG
6 - KICKDOWN DETENT 13 - SHUTTLE VALVE PRIMARY SPRING
7 - THROTTLE VALVE AND SPRING
21 - 298 AUTOMATIC TRANSMISSION - 42REBR/BE
VALVE BODY (Continued)

Fig. 309 Upper Housing Shift Valve And Pressure Plug Locations
1 - UPPER HOUSING 8 - RETAINER
2 - 1-2 SHIFT VALVE AND SPRING 9 - 1-2 SHIFT CONTROL VALVE AND SPRING
3 - 2-3 SHIFT VALVE AND SPRING 10 - PRESSURE PLUG COVER
4 - 2-3 THROTTLE PLUG 11 - LINE PRESSURE PLUG
5 - LIMIT VALVE HOUSING 12 - PLUG SLEEVE
6 - LIMIT VALVE COVER 13 - THROTTLE PRESSURE SPRING AND PLUG
7 - LIMIT VALVE AND SPRING
BR/BEAUTOMATIC TRANSMISSION - 42RE 21 - 299
VALVE BODY (Continued)

ADJUSTMENTS - VALVE BODY
CONTROL PRESSURE ADJUSTMENTS
There are two control pressure adjustments on the
valve body;
²Line Pressure
²Throttle Pressure
Line and throttle pressures are interdependent
because each affects shift quality and timing. As a
result, both adjustments must be performed properly
and in the correct sequence. Adjust line pressure first
and throttle pressure last.
LINE PRESSURE ADJUSTMENT
Measure distance from the valve body to the inner
edge of the adjusting screw with an accurate steel
scale (Fig. 322).
Distance should be 33.4 mm (1-5/16 in.).
If adjustment is required, turn the adjusting screw
in, or out, to obtain required distance setting.
NOTE: The 33.4 mm (1-5/16 in.) setting is an
approximate setting. Manufacturing tolerances may
make it necessary to vary from this dimension to
obtain desired pressure.
One complete turn of the adjusting screw changes
line pressure approximately 1-2/3 psi (9 kPa).
Turning the adjusting screw counterclockwise
increases pressure while turning the screw clockwise
decreases pressure.
THROTTLE PRESSURE ADJUSTMENT
Insert Gauge Tool C-3763 between the throttle
lever cam and the kickdown valve stem (Fig. 323).
Push the gauge tool inward to compress the kick-
down valve against the spring and bottom the throt-
tle valve.Maintain pressure against kickdown valve spring.
Turn throttle lever stop screw until the screw head
touches throttle lever tang and the throttle lever cam
touches gauge tool.
NOTE: The kickdown valve spring must be fully
compressed and the kickdown valve completely
bottomed to obtain correct adjustment.
Fig. 321 Accumulator Piston Components
1 - INNER SPRING
2 - ACCUMULATOR PISTON
3 - OUTER SPRING
4 - SEAL RINGS
Fig. 322 Line Pressure Adjustment
1 - WRENCH
2 - 1±5/16 INCH
Fig. 323 Throttle Pressure Adjustment
1 - HEX WRENCH (IN THROTTLE LEVER ADJUSTING SCREW)
2 - SPECIAL TOOL C-3763 (POSITIONED BETWEEN THROTTLE
LEVER AND KICKDOWN VALVE)
21 - 304 AUTOMATIC TRANSMISSION - 42REBR/BE
VALVE BODY (Continued)

AUTOMATIC TRANSMISSION - 44RE
TABLE OF CONTENTS
page page
AUTOMATIC TRANSMISSION - 44RE
DESCRIPTION..........................306
OPERATION............................308
DIAGNOSIS AND TESTING................314
AUTOMATIC TRANSMISSION.............314
PRELIMINARY........................314
ROAD TESTING.......................314
HYDRAULIC PRESSURE TEST...........315
AIR CHECKING TRANSMISSION CLUTCH
AND BAND OPERATION.................318
CONVERTER HOUSING FLUID LEAK......319
DIAGNOSIS CHARTS...................320
STANDARD PROCEDURE.................330
ALUMINUM THREAD REPAIR.............330
REMOVAL.............................330
DISASSEMBLY..........................331
CLEANING.............................336
INSPECTION...........................337
ASSEMBLY............................337
INSTALLATION..........................344
SCHEMATICS AND DIAGRAMS.............345
SPECIFICATIONS........................357
SPECIAL TOOLS........................359
ACCUMULATOR
DESCRIPTION..........................362
OPERATION............................362
INSPECTION...........................363
BANDS
DESCRIPTION..........................363
OPERATION............................364
ADJUSTMENTS.........................364
ELECTRONIC GOVERNOR
DESCRIPTION..........................365
OPERATION............................365
REMOVAL.............................367
INSTALLATION..........................367
EXTENSION HOUSING BUSHING
REMOVAL.............................369
INSTALLATION..........................369
EXTENSION HOUSING SEAL
REMOVAL.............................369
INSTALLATION..........................369
FLUID AND FILTER
DIAGNOSIS AND TESTING................370
EFFECTS OF INCORRECT FLUID LEVEL . . . 370
CAUSES OF BURNT FLUID..............370
FLUID CONTAMINATION................370
STANDARD PROCEDURE.................370
FLUID LEVEL CHECK...................370FLUID AND FILTER REPLACEMENT.......372
TRANSMISSION FILL...................372
FRONT CLUTCH
DESCRIPTION..........................373
OPERATION............................373
DISASSEMBLY..........................373
INSPECTION...........................376
ASSEMBLY............................376
FRONT SERVO
DESCRIPTION..........................377
OPERATION............................377
DISASSEMBLY..........................378
CLEANING.............................378
INSPECTION...........................378
ASSEMBLY............................379
OIL PUMP
DESCRIPTION..........................379
OPERATION............................379
STANDARD PROCEDURE.................379
OIL PUMP VOLUME CHECK..............379
DISASSEMBLY..........................380
CLEANING.............................381
INSPECTION...........................382
ASSEMBLY............................382
OUTPUT SHAFT FRONT BEARING
REMOVAL.............................384
INSTALLATION..........................384
OUTPUT SHAFT REAR BEARING
REMOVAL.............................384
INSTALLATION..........................384
OVERDRIVE CLUTCH
DESCRIPTION..........................385
OPERATION............................385
OVERDRIVE SWITCH
DESCRIPTION..........................385
OPERATION............................385
DIAGNOSIS AND TESTING................386
OVERDRIVE ELECTRICAL CONTROLS.....386
REMOVAL.............................386
INSTALLATION..........................386
OVERDRIVE UNIT
REMOVAL.............................387
DISASSEMBLY..........................387
CLEANING.............................394
INSPECTION...........................394
ASSEMBLY............................395
INSTALLATION..........................404
BR/BEAUTOMATIC TRANSMISSION - 44RE 21 - 305

OVERRUNNING CLUTCH CAM/OVERDRIVE
PISTON RETAINER
DESCRIPTION..........................405
OPERATION............................405
DISASSEMBLY..........................405
CLEANING.............................406
INSPECTION...........................406
ASSEMBLY............................406
PARK/NEUTRAL POSITION SWITCH
DIAGNOSIS AND TESTING................408
PARK/NEUTRAL POSITION SWITCH.......408
REMOVAL.............................408
INSTALLATION..........................408
PISTONS
DESCRIPTION..........................408
OPERATION............................409
PLANETARY GEARTRAIN/OUTPUT SHAFT
DESCRIPTION..........................410
OPERATION............................410
DISASSEMBLY..........................411
INSPECTION...........................411
ASSEMBLY............................412
REAR CLUTCH
DESCRIPTION..........................417
OPERATION............................417
DISASSEMBLY..........................418
CLEANING.............................418
INSPECTION...........................419
ASSEMBLY............................419
REAR SERVO
DESCRIPTION..........................421
OPERATION............................421
DISASSEMBLY..........................421
CLEANING.............................422
ASSEMBLY............................422
SHIFT MECHANISM
DESCRIPTION..........................422OPERATION............................422
ADJUSTMENTS.........................423
SOLENOID
DESCRIPTION..........................423
OPERATION............................424
SPEED SENSOR
DESCRIPTION..........................424
OPERATION............................424
THROTTLE VALVE CABLE
DESCRIPTION..........................424
ADJUSTMENTS.........................425
TORQUE CONVERTER
DESCRIPTION..........................427
OPERATION............................430
REMOVAL.............................432
INSTALLATION..........................432
TORQUE CONVERTER DRAINBACK VALVE
DESCRIPTION..........................432
OPERATION............................432
STANDARD PROCEDURE.................432
TORQUE CONVERTER DRAINBACK VALVE . 432
TRANSMISSION TEMPERATURE SENSOR
DESCRIPTION..........................433
OPERATION............................433
VALVE BODY
DESCRIPTION..........................433
OPERATION............................438
REMOVAL.............................452
DISASSEMBLY..........................453
CLEANING.............................465
INSPECTION...........................465
ASSEMBLY............................466
INSTALLATION..........................475
ADJUSTMENTS.........................476
AUTOMATIC TRANSMISSION -
44RE
DESCRIPTION
The 44RE is a four speed fully automatic transmis-
sion (Fig. 1) with an electronic governor. The 44RE is
equipped with a lock-up clutch in the torque con-
verter. First through third gear ranges are provided
by the clutches, bands, overrunning clutch, and plan-
etary gear sets in the transmission. Fourth gear
range is provided by the overdrive unit that contains
an overdrive clutch, direct clutch, planetary gear set,
and overrunning clutch.
The transmission contains a front, rear, and direct
clutch which function as the input driving compo-
nents. It also contains the kickdown (front) and thelow/reverse (rear) bands which, along with the over-
running clutch and overdrive clutch, serve as the
holding components. The driving and holding compo-
nents combine to select the necessary planetary gear
components, in the front, rear, or overdrive planetary
gear set, transfer the engine power from the input
shaft through to the output shaft.
The valve body is mounted to the lower side of the
transmission and contains the valves to control pres-
sure regulation, fluid flow control, and clutch/band
application. The oil pump is mounted at the front of
the transmission and is driven by the torque con-
verter hub. The pump supplies the oil pressure nec-
essary for clutch/band actuation and transmission
lubrication.
21 - 306 AUTOMATIC TRANSMISSION - 44REBR/BE