1993 DODGE TRUCK Service Repair Manual

21-216
TRANSMISSION
OVERHAUL—36RH/37RH

Fig.
81 Installing Driving
Shell
Thrust
Washer-36RH/37RH

Fig.
82 Installing Thrust
Washer
On Front Planetary
Gear—36RH/37RH
(11) Install front annulus gear over and onto front
planetary gear (Fig. 83). Be sure gears are fully meshed and seated.
(12) Install front planetary and annulus gear as­
sembly (Fig. 84). Hold gears together and slide them
onto shaft. Be sure planetary pinions are seated on sun gear and that planetary carrier is seated on out­
put shaft. •

Fig.
83
Assembling
Front Planetary And
Annulus
Gears—36RH/37RH

Fig.
84 Installing Front Planetary And
Annulus
Gear
Assembly-36RH/37RH
(13) Place geartrain in upright position. Rotate
gears to be sure all components are seated and prop­
erly assembled. Snap ring groove at forward end of
output shaft will be completely visible when compo­
nents are correctly assembled.
(14) Install planetary snap ring in groove at end of
output shaft (Fig. 85). (15) Turn planetary geartrain over. Position wood
block under front end of output shaft and support
TAB
DRIVING

•

TRANSMISSION
OVERHAUL—36RH/37RH
21 - 217

Fig.
85 Installing Planetary
Snap
Ring—36RH/37RH
geartrain on shaft. Be sure all geartrain parts have
moved forward against planetary snap ring. This is
important for accurate end play check.
(16) Check planetary geartrain end play with
feeler gauge (Fig. 86). Insert gauge between rear an­
nulus gear and shoulder on output shaft as shown.
End play should be 0.15 to 1.22 mm (0.006 to 0.048

in.).

(17) If end play is incorrect, install thinner/thicker
planetary snap ring as needed.
Fig.
86
Checking
Planetary
Geartrain
End
Play-36RH/37RH

VALVE
BODY
SERVICE
AND
ADJUSTMENT
VALWE
BODY DISASSEMBLY

CAUTION:
Do not
clamp
any
part
of the
valve
body
in
a
vise.
This
practice
will
distort
the
valve
body
and
transfer
plate
resulting
in
valve
bind.
Slide

valves
and
plugs
out
carefully.
Do not use
force
at

any
time.
The
valves
and
valve
body
will
be
dam­

aged
if
force
is
used.
Also
tag or
mark
the
valve
body
springs
for
reference
as
they
are
removed.
Do

not
allow
them
to
become
intermixed.

(1) Remove screws attaching adjusting screw
bracket to valve body and transfer plate. Hold
bracket firmly against spring force while removing last screw. (2) Remove adjusting screw bracket, line pressure
adjusting screw, pressure regulator spring and switch
valve spring (Fig. 87). Do not remove throttle
pressure adjusting screw from bracket and do
not disturb adjusting screw settings during re­
moval.
Fig.
87 Adjusting
Screw
Bracket And
Spring

Removal-36RH/37RH (3) Secure detent ball and spring in housing with
Detent Retainer Tool 6583 (Fig. 88).
DETENT
BALL
AND
SPRING
HOUSING
J932M21

Fig.
88
Securing
Detent
Ball
And
Spring
(4) Remove manual shaft E-clip, washer and seal
(Fig. 89). (5) Pull manual shaft and park rod assembly up­
ward out of valve body and off throttle lever. (6) Remove retainer tool and retain detent ball and
spring (Fig. 89).
(7) Remove throttle lever (Fig. 89),

21 - 218
TRANSMISSION OVERHAUL—36RH/37RH

•

THROTTLE
LEVER
PARK

ROD
LEVER
WASHER

AND

E-CLIP
J9121-80

Fig.
89 Removing Manual And Throttle
Levers-36RH/37RH (8) Remove park rod E-clip and separate rod from
manual lever (Fig. 90).
MANUAL LEVER

PARK
ROD
J9121-81

Fig.
90
Park
Rod Removal-36RH/37RH
(9) Remove shuttle valve cover (Fig. 91). (10) Remove governor valve end plate (Fig. 91).
(11) Remove stiffener plate (Fig. 91).
(12) Remove switch valve, pressure regulator
valve, throttle valve, throttle valve detent and man­
ual valve (Fig. 92).
(13) Remove 1-2 and 2-3 valve governor plugs (Fig.

92).
(14) Remove E-clip that retains shuttle valve and
spring in valve body. Then remove secondary spring
and guides, shuttle valve, primary spring and shuttle
REGULATOR
VALVE
END
PLATE
STIFFENER PLATE

Q /
SHUTTLE SHUTTLE
=
VALVE VALVE SECONDARY
END PLATE SPRING DOWNSHIFT
HOUSING SHIFT
VALVE END
PLATE

J9121-51

Fig.
91 Stiffener
Plate
And Shift
Valve
End Piates-36RH/37RH
valve throttle plug (Fig. 92). (15) Remove shift valve end plate and 3-2 down­
shift housing (Fig. 91). Keep housing screws with
housing for installation reference. (16) Remove throttle plug from downshift housing.
Then remove spring retainer and remove limit valve and spring from downshift housing (Fig. 92).
(17) Remove 1-2 shift control valve and spring, 2-3
shift valve and spring and 1-2 shift valve and spring (Fig. 92). (18) Remove regulator valve end plate (Fig. 91).
(19) Remove regulator valve line pressure plug,
pressure plug sleeve, throttle pressure plug and spring (Fig. 92).
(20) Turn valve body over so transfer plate is fac­
ing upward. With valve body in this position, valve
body check balls will remain in place and not fall out
when transfer plate is removed.
(21) Remove screws attaching transfer plate to
valve body and remove transfer plate from valve
body. Note position of valve body check balls for as­ sembly reference. (22) Position transfer plate on bench so separator
plate and filter are facing up. This will avoid having
rear clutch check ball fall out when plates are sepa­ rated.
(23) Remove screws attaching separator plate to
transfer plate and remove separator plate and filter. Note position of filter and rear clutch check ball for
assembly reference.

SHIFT VALVE
END PLATE THROTTLE
PLUG
1-2 SHIFT
CONTROL VALVE AND SPRING SHUTTLE VALVE
SECONDARY SPRING,
2-3 SHIFT
GU,DES- E"CL,P

VALVE
AND
SPRING
REGULATOR VALVE
END PLATE SHUTTLE VALVE
COVER
REGULATOR VALVE
PRESSURE PLUG
REGULATOR
VALVE THROTTLE PRESSURE PLUG 2-3 SHIFT
VALVE GOVERNOR PLUG
SHUTTLE VALVE PLUG (ALUM.)
LINE
PRESSURE
ADJUSTING SCREW GOVERNOR
VALVE
END
PLATE
MANUAL LEVER DETENT BALL
AND SPRING
ADJUSTING SCREW
BRACKET J9121-52

Fig. 92 Valve
Body
Components—36RH/37RH (ALUM, indicates aluminum part)

21
- 220
TRANSMISSION OVERHAUL—36RH/37RH

•
VALVE
BODY CLEANING AND INSPECTION
The only serviceable valve body components are

the:

• park lock rod and E-clip
• switch valve and spring
• pressure adjusting screw bracket
• throttle valve lever
• manual shaft
• manual shaft seal/washer/E-clip/detent ball
• fluid filter.
The remaining valve body components are serviced
only as part of a complete valve body assembly (Fig.

92).
Clean the valve body components in a parts clean­
ing solution only. Do not use gasoline, kerosene, or
any type of caustic solution.
Dry the parts with compressed air. Make sure all
passages are clean and free from obstructions. Do not use rags or shop towels to dry or wipe
off valve body components unless they are made
from lint free material. Lint will adhere to the
valve body components causing valve bind. Lint
can also clog filters and small fluid passages.
Inspect the throttle and manual valve levers and

shafts.
Do not attempt to straighten a bent shaft
or correct a loose lever. Replace these compo­
nents if worn, bent, loose or damaged in any way.
Inspect all of the valve body mating surfaces for
scratches, nicks, burrs, or distortion. Use a straight­
edge to check surface flatness. Minor scratches may
be removed with crocus cloth using only very light pressure.
Minor distortion of a valve body mating surface
may be corrected by smoothing the surface with cro­
cus cloth. Position the crocus cloth sheet on a surface
plate, sheet of plate glass, or equally flat surface. If distortion is severe or any surfaces are heavily
scored, the valve body will have to be replaced.

CAUTION:
The
throttle
valve, shuttle valve plug,
1-2

shift valve
and 1-2
governor plug
are
made
of

coated aluminum. Aluminum components
can be
identified
by the
dark color
of the
special coating
applied
to the
surface
(or by
testing
with
a
magnet).
DO
NOT
polish
or
sand
aluminum valves
or
plugs

with
any
type
of
material,
or
under
any
circum­
stances.
This practice
will
remove
the
special coat­
ing
and
cause
the
valves
and
plugs
to
stick
and
bind.

Inspect the valves and plugs for scratches, burrs,

nicks,
or scores. Also inspect the coating on the alu­
minum valves and plugs. If the coating is damaged
or worn through, the valve (or valve body) should be
replaced.
Aluminum valves and plugs must not be sanded or
polished under any circumstances. However, minor burrs or scratches on steel valves and plugs can be
removed with crocus cloth but do not round off the
valve or plug edges. Squareness of these edges is vi­
tally important; they prevent foreign matter from lodging between the valves and plugs and the bore.
Inspect all the valve and plug bores in the valve
body. Use a penlight to view the bore interiors. Re­
place the valve body if any bores are distorted or scored. Inspect all of the valve body springs. The
springs must be free of distortion, warpage or broken

coils.

Trial fit each valve and plug in its bore to check
freedom of operation. When clean and dry, the valves and plugs should drop freely into the bores.
Valve body bores do not change dimensionally with

use.
If the valve body functioned correctly when new,
it will continue to operate properly after cleaning and inspection. It should not be necessary to replace a valve body assembly unless it is damaged in han­
dling.
VALVE BODY ASSEMBLY

CAUTION:
Do not
force
the
valves
or
plugs
into place during reassembly.
If the
valve body bores

and
the
valves
and
plugs
are
free
of
distortion
or
burrs,
the
valves
and
plugs
should slide into place

easily.
In
addition,
do not
overtighten
the
transfer plate
and
valve body screws during reassembly.
Overtightening
can
distort
the
valve body resulting
in valve sticking,
cross
leakage
and
unsatisfactory
operation. Tighten
the
screws
alternately
and

evenly
to 4 Nnn (35 in.
lbs.) torque only.

(1) Lubricate valve body bores, valves and plugs
with ATF Plus, or Dexron II™ transmission fluid.
(2) Insert rear clutch check ball in transfer plate
and install filter in separator plate (Fig. 93).
SEPARATOR
TRANSFER

PLATE PLATE

FILTER
BALL
J9121-82

Fig.
93 Installing
Filter
and Rear
Clutch
Check
Bali—36RH/37RH

•

TRANSMISSION
OVERHAUL—36RH/37RH
21 - 221 (3) Align and install separator plate on transfer
plate (Fig. 94). (4) Verify rear clutch check ball position before se­
curing separator plate (Fig. 95). Ball should be visi­
ble in fifth orifice at lower right side of separator plate as shown.
(5) Install stiffener plate on separator plate. Then
secure separator and stiffener plates to transfer plate
with short attaching screws. Tighten screws to 4 Nnn (35 in. lbs.) torque. 1/4"
DIAMETER

CHECK
BALLS
TRANSFER

PLATE
SEPARATOR

PLATE
J9121-83

Fig.
94 Installing Separator Plate—36RH/37RH f^-^. )
REAR CLUTCH-

J9121-53-

Fig.
95
Verifying
Rear
Clutch
Check
Ball
Position-36RH/37RH (6) Position valve body so internal passages and
check ball seats are facing upward. Then install
check balls in valve body (Fig. 96). There are a total
of 7 check balls. Single large check ball has a diam­ eter of approximately 11/32 inch. Remaining 6 check
balls have a diameter of approximately 1/4 inch.
(7) Align and install transfer/separator plate as­
sembly on valve body (Fig. 97). Install screws attach­
ing transfer plate to valve body. Tighten screws alternately and in a diagonal pattern to 4 Nnn (35
in. lbs.) torque.
(8) Assemble regulator valve line pressure plug,
sleeve, throttle plug and spring (Fig. 98). Insert as­
sembly in valve body and install end plate. Tighten
end plate screws to 4 Nnn (35 in. lbs.) torque.
(9) Install 1-2 and 2-3 shift valves and springs
(Fig. 98).
11/32"
DIAMETER

CHECK
BALL
J9121-84

Fig.
96 Correct Position Of
Valve
Body Check

Balis-36RH/37RH
TRANSFER
PLATE/

SEPARATOR
PLATE ASSEMBLY
VALVE
BODY
J9121-85

Fig.
97 Installing Transfer
Plate
On
Valve
Body-36RH/37RH
(10) Install 1-2 shift control valve and spring (Fig.
98) (11) Assemble 3-2 downshift housing (Fig. 92). In­
stall throttle plug, limit valve and spring and secure
in housing with retainer.
(12) Position shift valve end plate on 3-2 downshift
housing. Then align housing and end plate on valve
body. Carefully compress shift valve springs and in­ stall screws that secure housing and end plate to
valve body (Fig. 91). Tighten screws to 4 Nnn (35 in.
lbs.) torque.
(13) Install shuttle valve as follows. (a) Insert shuttle valve in bore.
(b) Insert plastic guides in shuttle valve second­
ary spring. (c) Install secondary spring on end of valve.
(d) Hold shuttle valve in place.
(e) Compress secondary spring and install E-clip
in groove at end of shuttle valve. Verify that
spring and E-clip are properly seated before pro­
ceeding. (14) Install shuttle valve cover (Fig. 99) and cover
screws to 4 Nnn (35 in. lbs.) torque. (15) Install 1-2 and 2-3 valve governor plugs. Then
install shuttle valve primary spring and throttle plug (Fig. 99).

21 - 222 TRANSMISSION
OVERHAUL-86RH/37RH

REGULATOR VALVE

SPRING

THROTTLE

PRESSURE
PLUG

2-3

SHIFT

VALVE AND

SPRING
SLEEVE

SWITCH VALVE
LINE

PRESSURE

REGULATOR VALVE
1-2

SHIFT

VALVE AND

SPRING
1-2

SHIFT

CONTROL VALVE AND

SPRING
Fig. 98 Shift
Valve
And Spring installation-36RH/37RH

LINE

PRESSURE
PLUG
J9121-86

SHUTTLE
VALVE
END PLATE

SECONDARY

SPRING
&
GUIDES
SHUTTLE VALVE

PRIMARY
SPRING

SHUTTLE VALVE

THROTTLE
PLUG
GOVERNOR
PLUG-

END PLATE
J9121-50

Fig.
99
Control
Valve
Locations—36RH/37RH

•

TRANSMISSION
OVERHAUL—36RH/37RH
21 - 223 (16) Align and install governor plug end plate
(Fig. 99) on valve body and install end plate screws.
Tighten screws to 4 N»m (35 in. lbs.) torque.
(17) Install manual valve (Fig. 99). (18) Install throttle valve and spring. Then install
kickdown valve and detent (Fig. 99). (19) Install pressure regulator valve and switch
valve (Fig. 99).
(20) Install manual lever detent spring in housing.
Place detent ball on end of spring and push ball and spring into housing. Secure ball and spring with Re­
tainer Tool 6583 (Fig. 88).
(21) Insert line pressure adjusting screw in adjust­
ing screw bracket (Fig. 92).
(22) Place valve spring on end of line pressure reg­
ulator valve.
(23) Install switch valve spring on tang at end of
adjusting screw bracket (Fig. 87). (24) Install adjusting screw bracket on valve body.
Align springs, press bracket toward valve body and install long bottom bracket attaching screw first. Do
not tighten screw fully at this time.
(25) Carefully align bracket on valve body and
transfer plate and install remaining (two) bracket screws. Verify that valve springs and bracket are
properly aligned. Then tighten all three bracket screws to 4 N*m (35 in. lbs.) torque.
(26) Install throttle lever in valve body. Then in­
stall manual lever over throttle lever and start man­
ual lever into valve body.
(27) Align manual lever detent with detent ball
and align lever arm with manual valve. Hold throt­
tle lever upward. Then press down on manual lever until lever is fully seated.
(28) Install manual lever seal, washer and retain­
ing E-clip.
(29) Lubricate shaft of manual lever with light
coat of petroleum jelly. This will help protect seal lip
when manual shaft seal is installed.
(30) Verify that throttle lever is aligned with end
of kickdown valve stem and that manual lever arm
is engaged in manual valve (Fig. 100).
(31) If line pressure and/or throttle pressure ad­
justment screw settings were not disturbed, continue with overhaul or reassembly. However, if adjustment screw settings were moved or changed, readjust as
described in Valve Body Control Pressure Adjust­
ment procedure.

VALVE BODY CONTROL
PRESSURE

ADJUSTMENTS

There are two control pressure adjustments on the
valve body which are, line pressure and throttle pres­
sure.
Line and throttle pressures are interdependent be­
cause each affects shift quality and timing. As a re-
Fig.
100 Manual And
Throttle
Lever

Alignment-36RH/37RH
suit, 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. 101).
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. The 33.4 mm (1-5/16 in.) setting is an approxi­
mate 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). Turn­
ing the adjusting screw counterclockwise increases
pressure while turning the screw clockwise decreases
pressure.
Fig.
101
Line
Pressure
Adjustment—36RH/37RH