DODGE TRUCK 1993 Service Repair Manual

21
-
130
IN-VEHICLE
SERVICE-~32RH/36RH/37RH/42RH/4iRH

•
IN-VEHICLE
SERVICE-32RH/36RH/37RH/42RH/46RH

INDEX

page
Aluminum Thread Repair
141
Checking
Fluid
Level
130
Extension Housing Bushing
and
Output
Shaft
Bearing
Service-32RH/36RH/37RH
... .
135

Extension Housing Yoke Seal Replacement
....
135

Fluid
and Filter
Change
130

Front
Band
Adjustment
133

Gearshift Linkage
Adjustment
130

Governor
and
Park Gear Service—
32RH/36RH/37RH
137

Governor
and
Park Lock Service—42RH/46RH
.
138

CHECKING
FLUID LEVEL

(1) Position vehicle
on
level surface. This
is ex­

tremely important
for
accurate check.
(2)
Apply parking brakes
and run
engine
at
curb
idle speed.
(3)
Shift transmission momentarily into
all
gear
ranges. Then shift back
to
Neutral.
(4)
Clean
top of
filler tube
and
dipstick
(to
avoid
dirt entry)
and
check fluid level. Correct level
is as

follows:
(5)
Be
sure fluid
is at
normal operating tempera­
ture (180°F). Correct level
is
between "Maximum Level
Hot"
and
"Add"
marks (crosshatched area)
on

dipstick. (6)
If
fluid level
is
low,
add
only enough fluid
to

correct level.

CAUTION:
Do not
overfill
the
transmission. Overfill­ing
will
force fluid
out
the
pump vent which
can
be

mistaken
for
a
pump seal leak. Overfilling
will
also

cause
fluid aeration
and foaming
when
the
excess
fluid
is
picked
up
and
churned
by
the
gear train. Aeration
will
reduce fluid
life
significantly.

FLUID
AND
FILTER
CHANGE
Normal Change
Interval
The fluid
and
filter should
be
changed
(and the

bands adjusted)
at
recommended maintenance inter­
vals.
Or
whenever
the
transmission
has
been disas­sembled
for
any
reason.

Recommended Fluid
The recommended
(and
preferred) fluid
for

Chrysler automatic transmissions
is
Mopar
ATF

Plus,
type
7176.
Use
Mopar Dexron
II
only when
ATF Plus
is not
readily available.
page
Park Lock
Service-32RH/36RH/37RH
. 138

Park/Neutral Position Switch
134
Rear
Band
Adjustment
133

Speedometer Service
134

Transmission Cooler Service
140
Transmission
Throttle
Cable
Adjustment-
Cummins Diesel Engine
132

Transmission
Throttle
Cable
Adjustment-
Gas
Engines
131

Valve Body
Control
Pressure Adjustments
.....
140

Valve Body Service
138

Severe Usage Change
Interval
Under severe usage,
the
fluid
and
filter should
be

changed
and the
bands adjusted
at
12,000 mile (19,000
km)
intervals.
Severe usage
is
defined
as:

• More than half
of
vehicle operation occurs
in

heavy city traffic during
hot
weather
at
ambient
temperatures above
90°
F.
• Vehicle
is
used
for
Taxi, Police, Limousine,
or
sim­
ilar commercial operations.
• Vehicle
is
used
for
trailer/boat towing
or
heavy
load hauling. When
the
factory fluid
is
drained, refill
the
trans­
mission with Mopar
ATF
Plus, type
7176
fluid.
Mo­

par Dexron
II
can
be
used
if
ATF
Plus
is
not
readily available.

FLUID
AND
FILTER
REPLACEMENT
PROCEDURE
(1) Raise vehicle, remove
oil pan
and
drain fluid.
(2) Remove filter screws
and
remove filter.
(3) Position
new
filter
on
valve body
and
install fil­
ter screws finger tight. (4) Tighten filter screws
to 4
N*m (35
in.
lbs.)
with
torque wrench.
(5) Position
new
gasket
on oil pan
and
install
pan

on transmission. Tighten
pan
bolts
to 17
N»m
(150

in.
lbs.)
torque. (6) Lower vehicle
and
refill transmission with rec­
ommended fluid.

GEARSHIFT LINKAGE ADJUSTMENT
Check linkage adjustment
by
starting
the
engine
in Park
and
Neutral. Adjustment
is
OK
if
the
engine starts only
in
park
and Neutral. Adjustment
is
incorrect
if
the
engine starts
in one

but
not
both positions. If
the
engine starts
in
any
position other than Park
or Neutral,
or if
the
engine will
not
start
at
all,
the

park/neutral position switch
may
be
faulty.

•

IN-VEHICLE
SERVICE-32RH/36RH/37RH/42RH/46RH
21 - 131

Fig.
1
Column
Gearshift
Linkage
LINKAGE
ADJUSTMENT
PROCEDURE

Do
not
attempt
linkage
adjustment
if any
compo­
nents
are
worn
or
damaged.
If
either linkage
rod

must
be
disconnected,
the plastic
grommet secur­
ing
the rod in the
torque shaft lever must
be re­
placed. Disconnect
the rod
with
a pry
tool.
Pry
only where
the
grommet
and rod
attach
and not on

the
rod
itself.
Then
cut
away
the old
grommet.
Use

pliers
to
snap
the new
grommet into
the
lever
and

to snap
the rod
into
the
grommet.
(1) Shift transmission into Park.
(2) Raise vehicle.
(3) Check condition
of
shift rods, control lever,
bushings, washers
and
torque shaft
(Fig.
1). Tighten,
repair,
or
replace worn
or
damaged parts. (4) Loosen shift rod adjusting swivel lock screw.
Be

sure swivel turns freely
on rod.
(5) Verify that valve body shift control lever
is in

Park detent. Move lever fully rearward
to
check. (6) Adjust swivel position
(on the
shift rod)
to a ob­

tain free
pin fit in
torque shaft lever
(Fig. 1).
Then
tighten swivel lock screw
to 10 N»m (90 in. lbs.)
torque.
(7) Check adjustment
by
starting engine
in
Park
and Neutral. Engine should start
in
these positions

only. If
engine starts
in any
position other than
Park
or
Neutral, adjustment
is
incorrect
or

park/neutral position switch
is
faulty.
TRANSMISSION
THROTTLE
CABLE

ADJUSTMENT-GAS
ENGINES
(1)
Turn ignition
key to OFF
position.

(2)
Remove
air
cleaner.

(3)
Position 2.8
-
3.04
mm
(0.110
-
0.120
in.)
thick
spacer between idle stop
and
throttle lever
on
throt­
tle body.
Use
appropriate thickness feeler gauges,
or
shim stock
as
spacer
(Fig. 2).
Fig.
2
Positioning
Spacer
Between
Throttle
Stop

And
Lever
(Gas
Engine)

(4) Press cable lock button
to
release cable
(Fig. 3).

21 - 132
IN-VEHICLE
SERVICE-32RH/36RH/37RH/42RH/46RH

•
IDLE STOP

ADJUSTMENT
• —/

SPACER (USE
Hk±s

FEELER
GAUGES
/o)

OR SHIM STOCK)



THROTTLE BODY LEVER TRANSMISSION
THROTTLE CABLE
TORQUE

SHAFT

BRACKET.
CABLE

RETURN
SPRING
^
CABLE

CONDUIT

CABLE
^1

BUTTON
1
CABLE
\>

WIPER
J932M84

Fig.
3
Throttle
Cable Attachment At
Engine
(Gas
Engine)
(5) Pull cable conduit toward rear of vehicle until
wiper is completely retracted into end of conduit fit­
ting (Fig. 3). Then release cable lock button. (6) Raise vehicle for access to transmission throttle
valve lever (Fig. 4).
(7) Rotate throttle valve lever toward front of ve­
hicle until ratcheting sound (from cable) stops.

CAUTION:
Do not
rotate
the
throttle
valve
lever
be­

yond
the
idle
stop.
The
lever,
valve
and
manual
le­

ver
shaft
will
be
damaged
if
rotated
too far.
(8) Remove spacer and check cable adjustment.
Throttle valve lever should begin to move at same
time lever on MPI throttle body moves off idle posi­
tion.
(9) Lower vehicle.
(10) Install air cleaner.

TRANSMISSION
THROTTLE
CABLE

ADJUSTMENT-CUMMINS
DIESEL
ENGINE
A cable is used to operate the transmission throttle
valve on models with a Cummins diesel engine. Ca­
ble adjustment is controlled by a locking pawl on the cable sheath (Fig. 5). The rear of the cable is connected to the transmis­
sion throttle valve lever. The forward end of the ca­
ble is attached to a pin on the engine throttle cam
RETURN

SPRING
/

BRACKET
^

CABLE

BRACKET
THROTTLE

VALVE
LEVER

(ROTATE
LEVER
IN
DIRECTION
OF
ARROW

FOR
ADJUSTMENT)
THROTTLE

VALVE
CABLE
J9221-64

Fig.
4
Throttle
Cable Attachment At
Transmission
(Gas
Engine)

(Fig. 6). Rotation of the throttle cam (by the engine
throttle cable), actuates the cable and throttle valve lever for downshifts. A 4.57 mm (0.180 in.) diameter gauge is needed
to check and adjust the throttle valve cable on diesel models. Use a micrometer and inside cali­

pers,
a drill of the correct diameter, or fabricate a gauge from metal or aluminum stock. (1) Run engine until it reaches normal operating
temperature.
(2) Verify that engine hot idle speed is within
specifications. Adjust hot idle rpm if necessary.
(3) Check cable adjustment with gauge as follows: (a) Verify that throttle lever is seated against
low idle stop screw (with accelerator pedal fully re­ leased).
(b) Check clearance between rear of cable actuat­
ing pin and end of slot in throttle valve cable (Fig.
6).

(c) Clearance should be 4.57 mm (0.180 in.) as
measured with gauge. (d) If adjustment is OK, no further action is re­
quired. However, if clearance is greater or less
then specified, adjust cable as described in follow­ ing steps.

•

IN-VEHICLE SERVICE-32RH/36RH/37RH/42RH/46RH
21 - 133 (4) Lift and release cable locking pawl (Fig. 7).
(5) Insert gauge between cable actuating pin and
end of slot in cable. (6) Slide cable forward or rearward to obtain spec­
ified clearance between pin and cable slot.
(7) Press cable locking pawl downward until it
snaps into locked position.
(8) Check cable adjustment one more time before
moving vehicle. This avoids misadjustment caused by
a shift in component position during adjustment pro­
cedure.
THROTTLE
TRANSMISSION
CAM
THROTTLE

VALVE
i j
/\&s/,

CABLE

m

ENGINE

THROTTLE
CABLE CABLE

LOCK PAWL
J9121-533

Fig.
5
Transmission
Throttle
Cable
Attachment—Diesel
Engine

4.57
MM

(0.180
IN.) GAUGE

J9121-534

Fig.
6
Transmission
Throttle
Cable
Adjustment—Diesel
Engine
FRONT BAND ADJUSTMENT

The front (kickdown) band adjusting screw is at the
left side of the case above the manual valve and
throttle valve levers (Fig. 8). (1) Raise vehicle.
(2) Loosen band adjusting screw locknut. Then
back locknut off 4-5 turns. Also be sure adjusting screw turns freely in case. Lubricate screw threads if
necessary. (3) Tighten band adjusting screw to 8 Nrm (72 in.
J9121
-535

Fig.
7
Transmission
Throttle
Cable
Locking
Pawl
Position—Diesel
Engine
lbs.) torque. If Adapter Extension C-3705 must be
used to reach adjuster screw, tighten screw to only 5 N»m (47-50 in. lbs.) torque.
(4) Back off adjusting screw 2-1/2 turns on all
transmission models. (5) Hold adjuster screw in position with backup
wrench. Then tighten locknut to 41 N»m (30 ft. lbs.)
torque. (6) Lower vehicle.
TO COOLER
KICKDOWN BAND ADJUSTING SCREW
GEARSHIFT CONTROL LEVER
RH256

Fig.
8 Front (Kickdown)
Band
Adjustment
Screw
Location
REAR
BAND ADJUSTMENT

The transmission oil pan must be removed for ac­
cess to the rear band adjusting screw. (1) Raise vehicle.
(2) Remove transmission oil pan and drain fluid.
(3) Loosen band adjusting screw locknut 5-6 turns.
Be sure adjusting screw turns freely in lever. Lubri­
cate screw threads if necessary. (4) Tighten adjusting screw to 8 Nnn (72 in. lbs.)
torque (Fig. 9). (5) Complete band adjustment as follows:
• On 32RH/42RH, back off adjusting screw four

turns.

21
- 134
IN-WEHiCLE SER¥iCE-32RH/3IRH/37RH/42RH/46RH

• • On 36RH/37RH746RH, back off adjusting screw
two turns. (6) Hold adjusting screw in place with backup
wrench. Then tighten locknut to 34 N*m (25 ft. lbs.) torque.
(7) Position new gasket on oil pan and install pan
on transmission. Tighten pan bolts to 17 N»m (13 ft.
lbs.) torque.
(8) Lower vehicle and refill transmission with Mo­
par ATF Plus, type 7176, or Dexron II™ fluid.
Fig. § Rear Band Adjustment Screw Location

SPEEDOMETER
SERVICE
Rear axle gear ratio and tire size determine speed­
ometer pinion requirements. If the gear must be re­
placed, refer to the parts catalogue information for
the correct pinion.

ADAPTER
AND
PINION REMOWAL

(1) Raise vehicle.
(2) Disconnect wires from vehicle speed sensor.
(3) Remove speed sensor from speedometer adapter
(Fig. 10). SEAL ADAPTER ADAPTER
RETAINING OIL O-RING
SPEED ADAPTER SPEEDOMETER
SENSOR CLAMP ADAPTER J932M00
Fig. 10 Speedometer Components (4) Check speed sensor mounting area in speedom­
eter adapter. If transmission fluid is found in this area, adapter oil seal is leaking and will have to be
replaced. (5) Remove bolt and retainer securing pinion gear
adapter to extension housing. (6) Carefully work adapter and gear out of hous­
ing. (7) Remove and discard adapter O-ring (Fig. 10).
(8) Remove adapter oil seal if necessary. Start new
seal in adapter by hand. Then press seal into adapter
with Installer Tool C-4004 until tool bottoms (Fig.

10).

ADAPTER AND PINION INSTALLATION AND
ADJUSTMENT

CAUTION:
Before installing
the
pinion
and
adapter

assembly,
make sure
the
adapter flange
and
flange
seat
in the
housing
are
perfectly clean. Dirt
or
for­

eign
material
on
these surfaces
will
cause misalign­ ment resulting
in
pinion gear damage.

(1) Thoroughly clean adapter flange and flange
seat in extension housing.
(2) Lubricate adapter oil seal and O-ring with
transmission fluid.
(3) Count number of teeth on pinion gear before
installing gear in adapter.
(4) Note range numbers on adapter face (Fig. 11).
These numbers correspond to number of teeth on pin­ ion.
(5) Install adapter in extension housing.
(6) Rotate adapter until required range numbers
are at six o-clock position (Fig. 12). Be sure adapter
range numbers correspond to number of teeth on pin­ ion.
(7) Seat adapter in housing.
(8) Install adapter clamp. Tighten clamp bolt to 11
N*m (100 in. lbs.) torque.
(9) Install vehicle speed sensor. Tighten sensor
coupling nut to 17 N*m (150 in. lbs.) torque and in­
stall sensor wires.
(10) Lower vehicle and top off transmission fluid
level.

PARK/NEUTRAL
POSITION SWJTCH
The center terminal of the park/neutral position
switch is the starter circuit terminal. It provides the
ground for the starter solenoid circuit through the se­
lector lever in Park and Neutral positions only. The
outer terminals on the switch are for the backup
lamp circuit.
SWITCH TEST To test the switch, remove the wiring connector.
Then test continuity between the center terminal

•

IN-VEHICLE
SERVICE-32RH/3eRH/37RH/42RH/46RH
21 - 135

SPEEDOMETER
ADAPTER
LOCK
RING

OIL
SEAL
SPECIAL

TOOL

C-4004
J9321-186

Fig. 11 Replacing Speedometer Adapter Seal
RETAINER
-ADAPTER

-7^6
O'CLOCK
POSITION
RH75

Fig.
12 Indexing Speedometer Adapter
and the transmission case. Continuity should exist
only when the transmission is in Park or Neutral.
Shift the transmission into reverse and test conti­
nuity at the switch outer terminals. Continuity should exist only when the transmission is in Re­
verse. Continuity should not exist between the outer
terminals and the case.
Check gearshift linkage adjustment before replac­
ing a switch that tests bad.

SWITCH
REPLACEMENT
(1) Raise vehicle and position drain pan under
switch. (2) Disconnect switch wires.
(3) Remove switch from case.
(4) Move shift lever to Park and Neutral positions.
Verify that switch operating lever fingers are cen­
tered in switch opening in case (Fig. 13).
(5) Install new seal on switch and install switch in

case.
Tighten switch to 34 Nnn (25 ft. lbs.) torque. (6) Test continuity of new switch with 12 volt test

lamp.

(7) Connect switch wires and lower vehicle.
(8) Top off transmission fluid level.
EXTENSION HOUSING
YOKE
SEAL REPLACEMENT (1) Raise vehicle.
(2) Mark propeller and axle yokes for alignment
reference. Then disconnect and remove shaft. (3) Remove old seal with Remover Tool C-3985
(Fig. 14).
SWITCH

RH266

Fig.
13 Park/Neutral Position
Switch
Contacts (4) Start new seal in housing. Then tap seal into
place with Installer Tool
C-3995
or
C-3972
(Fig. 15).
(5)
Carefully guide propeller shaft slip yoke into
housing and onto output shaft splines. Align marks made at removal and connect propeller shaft to rear
axle pinion yoke.

SPECIAL
TOOL

Fig.
14
Removing
Extension
Housing
Yoke
Seal
SPECIAL
TOOL

RH78

Fig.
15 Installing Extension
Housing
Yoke
Seal

EXTENSION HOUSING BUSHING AND OUTPUT
SHAFT BEARING
SERVlCE-32RH/3eRH/37RH

EXTENSION
HOUSING
REMOVAL
(1) Shift transmission into 1 (manual low) position.
(2) Raise vehicle.
(3) Mark propeller shaft and axle yokes for align­
ment reference. Then disconnect and remove shaft. (4) Remove vehicle speed sensor, speedometer
adapter and speedometer pinion gear (Fig. 10).

21 - 136
IN-VEHICLE
SERVICE—32RH/36RH/37RH/42RH/46RH

•
(5)
Remove bolts attaching extension housing to
rear support.
(6) Raise transmission slightly with jack stand or
floor jack. (7) Remove crossmember and rear support as as­
sembly.
(8) Remove extension housing attaching bolts.
(9) Remove access plate and gasket from underside
of extension housing. Plate must be removed for ac­
cess to rear bearing locating ring.
(10) Insert parallel jaw snap ring pliers into access
plate opening and spread bearing locating ring (Fig.
16).
(11) Hold snap ring in a spread position and work
extension housing off rear bearing.

Fig.
16
Releasing
Rear Bearing Locating
Ring

(12) Carefully pull extension housing rearward to
move park lock rod past sprag and remove housing.

OUTPUT
SHAFT
REAR
BEARING

REPLACEMENT

(1) Remove snap ring that retains rear bearing on
output shaft (Fig. 17).

Fig.
17 Rear Bearing Location
(2) Remove bearing from output shaft. Note that
36RH/37RH transmissions have a second snap ring
at front of shaft bearing. 32RH transmissions do not
have this second snap ring. (3) Install new bearing on shaft. Be sure locating
ring groove in outer circumference of bearing is to­
ward front (Fig. 17). (4) Install rear bearing retaining snap ring (Fig.

16).
However, do not install the locating ring on the
bearing. The locating ring goes in the extension
housing. The ring is not seated in the rear bearing until the housing is installed.

EXTENSION
HOUSING
BUSHING

REPLACEMENT
(1) Remove housing oil seal with Remover Tool
C-3985 (Fig. 18).

Fig.
18
Removing
Extension
Housing
Seal

(2) On 32RH, remove housing bushing with bush­
ing Tool C-4470. On 36RH/37RH, remove bushing
with Tool C-4469 (Fig. 19).
(3) On 32RH, slide new bushing on installing end
of Tool C-4470. On 36RH/37RH, slide bushing on
Tool C-4469 (Fig. 19).
(4) Align bushing oil hole with oil slot in extension
housing. Then tap bushing into place (Fig. 19).
(5) Install new seal in housing (Fig. 20). On 32RH
use Seal Installer C-3995. On 36RH/37RH, use Seal
Installer C-3972.

Fig.
19 Extension
Housing
Bushing
Replacement

EXTENSION
HOUSING
INSTALLATION
(1) Position new gasket on housing. Use petroleum
jelly to hold gasket in place.
(2) Install locating ring in extension housing, if re­
moved.
(3) Slide housing onto output shaft.

IN-VEHICLE
SERVICE-32RH/38RH/37RH/42RH/46RH
21 - 137

SPECIAL TOOL GOVERNOR SUPPORT

AND
PARKING GEAR RH78

Fig. 20 installing Extension Housing
Seal

(4) Work park rod past sprag and move housing
into place on shaft.
(5) Spread rear bearing locating ring with parallel
jaw snap ring pliers. (6) Hold locating ring in spread position. Then
push housing forward until locating ring seats in
bearing and housing seats against transmission case. Be sure locating ring is fully seated in rear bearing.
(7) Install and tighten housing attaching bolts to
43 Nnn (32 ft. lbs.) torque.
(8) Install gasket and access plate on underside of
housing.
(9) Install crossmember and rear mount assembly.
(10) Remove jack used to support transmission.
(11) Install and tighten housing-to-rear mount
bolts to 68 Nnn (50 ft. lbs.) torque. (12) Install speedometer pinion and adapter.
(13) Align and install propeller shaft. (14) Lower vehicle.
(15) Top off transmission fluid level if necessary.

GOVERNOR AND PARK GEAR SERVICE—32RH/

3SRH/37RH

GOVERNOR
AND
PARK
GEAR
REMOVAL
(1) Remove extension housing and output shaft
rear bearing. Refer to procedure in this section.
(2) Carefully remove snap ring from weight end of
governor valve shaft (Fig. 21). (3) Slide governor valve and shaft out of governor
body. (4) Remove large snap ring from weight end of gover­
nor body and remove governor weight assembly.
(5) Remove snap ring from governor weight and
remove inner weight and spring from outer weight (Fig. 21).
(6) Remove snap ring retaining governor body and
park gear on output shaft (Fig. 22). (7) Slide governor body and park gear assembly off
output shaft. (8) Remove bolts attaching governor body to gear
and separate body from gear. (9) Remove filter screen from governor body.

GOVERNOR/PARK
GEAR
CLEANING
AND

INSPECTION

Thoroughly clean all the governor parts in a suit­
able cleaning solution but do not use any type of
caustic cleaning agents.
GOVERNOR BODY
LOCKING BOLTS
(4)

Fig.
21
Governor
Snap
Ring
Locations-
37RH
RH269
-32RH/36RH/
The weights and valves should fall freely in their
bores when clean and dry.
Minor surface scratches and burrs can be removed
with crocus cloth. Inspect the governor weight spring for distortion. Replace the spring, if damaged. Clean the filter in solvent and dry it with com­
pressed air. Replace the filter if damaged. Inspect the park gear for chipped or worn gear
teeth or damaged ring grooves. Replace the gear, if damaged.
SPRING
OUTER WEIGHT
SNAP
RINGS
INNER WEIGHT VALVET SHAFT
VALVE
SNAP
RING

FILTER SCREEN

J9221-51

Fig.
22
Governor
Components—32RH/36RH/37RH
GOVERNOR/PARK
GEAR
ASSEMBLY
AND

INSTALLATION
(1) Assemble governor body, filter screen and park
gear.

21
- 138
IN-VEHICLE SERVSCE-32RH/36RH/37RH/42RH/46RH

(2) Install and tighten gear-to-body bolts finger
tight. Make sure oil passage in governor body aligns
with matching passage in gear. (3) Install assembled governor body and gear on
output shaft.
(4) Position governor body so valve shaft hole in
body aligns with matching hole in output shaft. Then slide body and park gear into place. (5) Install snap ring securing governor and park
gear to output shaft (Fig. 22).
(6) Tighten bolts attaching governor body to park
gear to 11 N»m (95 in. lbs.) torque.
(7) Assemble governor weights and spring. Secure
inner weight and spring in outer weight with snap
ring (Fig. 21).
(8) Install weight assembly in governor body and
install retaining snap ring (Fig. 21).
(9) Place governor valve on valve shaft. Insert shaft
in governor body, through governor weights and output
shaft. Be sure valve is properly seated in body.
(10) Secure valve shaft with small snap ring.
(11) Install output shaft bearing and extension
housing. Refer to procedure in this section.

GOVERNOR
AND
PARK LOCK SERVICE—42RH/
46RH

The governor and park lock components are located
within the overdrive unit and cannot be serviced in
the vehicle. The overdrive unit must be removed and disassem­
bled for access to the governor and park lock compo­
nents.
Refer to the 42RH/46RH overdrive unit service sec­
tions for repair procedures.

PARK
LOCK SERVICE—32RH/36RH/37RH
PARK LOCK
COMPONENT REMOVAL
(1) Remove extension housing as described in this
section. (2) Slide sprag shaft out of extension housing and
remove sprag and spring (Fig. 23).
(3) Remove snap ring and slide reaction plug and
pin assembly out of housing. (4) If park rod requires service, it will be necessary
to remove valve body. Refer to Valve Body Service
procedures in this section.

COMPONENT INSPECTION
Inspect the sprag shaft for scores and free move­
ment in the housing and sprag. Inspect the sprag and control rod springs for distortion and loss of tension.
Inspect the square lug on the sprag for broken

edges.
Check the lugs on the park gear for damage. Inspect the ball on the end of the control rod for
nicks and burrs. Also be sure the ball rotates freely.
J9221-249

Fig. 23
Park
Lock Components-32RH/36RH/37RH
PARK
LOCK
COMPONENT INSTALLATION

(1) Install reaction plug and pin assembly in hous­
ing and secure with new snap ring (Fig. 23).
(2) Position sprag and spring in housing and insert
sprag shaft. Be sure square lug on sprag is toward
park gear. Also be sure spring is positioned so it moves sprag away from gear.
(3) Replace park rod if necessary. (4) Install extension housing as described in this
section.

VALVE BODY
SERVICE

GENERAL SERVICE
INFORMATION
The valve body can be removed for service without
having to remove the entire transmission assembly. The valve body can be disassembled for cleaning
and inspection of the individual components. Refer to
the procedures in the Transmission Unit Subassem­
bly Overhaul section.
The only serviceable valve body components are

the:

• manual lever
• manual lever washer/seal/E-clip and shaft seal
• manual lever detent ball
• throttle lever
• fluid filter
• overdrive solenoid and connector assembly
• switch valve, spring and adjusting screw bracket • converter clutch solenoid The remaining valve body components are serviced
only as part of a complete valve body assembly.

VALVE
BODY
REMOVAL
(1) Raise vehicle.
(2) Remove oil pan and drain fluid.
(3) Loosen clamp bolts and remove throttle and
manual valve levers from manual lever shaft. (4) Remove park/neutral position switch. (5) Remove filter from valve body.
(6) Disconnect converter clutch solenoid wire from
case connector.

•

IN-VEHICLE
SERVICE-32RH/36RH/37RH/42RH/46RH

21 - 139 (7) Push solenoid connector out of case.
(8) Remove valve body attaching screws.
(9) Lower valve body enough to remove accumula­
tor piston and piston spring (Fig. 24).
(10) Pull valve body forward to disengage park rod. (11) Push manual lever shaft and solenoid case
connector out of transmission case. Lower valve body,
rotate it away from case, pull park rod out of sprag and remove valve body (Figs. 25 and 26).
ACCUMULATOR
OUTER

PISTON
SPRING

INNER
SEAL

SPRING
RINGS
J932M87

Fig.
24
Accumulator
Piston
And
Springs
(42RH/
46RH
Shown)

Fig.
25
Valve
Body
Assembly—4-Speed
Transmission
VALVE
BODY
INSTALLATION

(1) Verify that park/neutral position switch has
NOT been installed. Valve body cannot be installed
with switch in place. Remove switch if necessary.
(2) Install new seals on accumulator piston and in­
stall piston in case.
(3) Place valve body manual lever in low (1 posi­
tion) to ease installing park rod in sprag.
(4) Use screwdriver to push park sprag into en­
gagement with park gear. This allows knob on rod to
MANUAL
CONVERTER

LEVER
CLUTCH
- Fig. 26
Valve
Body
Assembly—3-Speed

Transmission

move past sprag when valve body is installed. Rotate
output shaft to verify sprag engagement. (5) Position accumulator spring between accumula­
tor piston and valve body.
(6) Position valve body on transmission and work
park rod past sprag. Be sure accumulator piston and spring remain in position.
(7) Hold valve body in position and install valve
body attaching screws linger tight only.
(8) Install park/neutral position switch in case.
(9) Tighten valve body attaching screws alter­
nately and evenly to 11 N#m (100 in. lbs.) torque.
(10) Install new fluid filter on valve body. Install
and tighten filter screws to 4 N-m (35 in. lbs.) torque. (11) Connect solenoid wire to case connector.
(12) Install manual and throttle levers on throttle
lever shaft. Tighten lever clamp screws and check for
free operation. Shaft and levers must operate freely
without any bind.
(13) Install oil pan and new gasket. (Tighten pan
bolts to 17 N»m (150 in. lbs.) torque. (14) Connect park/neutral position switch and con­
verter clutch solenoid wires.
(15) Install speedometer pinion gear, adapter and
speed sensor.
(16) Lower vehicle.
(17) Fill transmission with Mopar ATF Plus, Type

7176,
or Dexron II™ fluid if ATF Plus is not readily
available. (18) Adjust gearshift and throttle linkage.