1993 DODGE TRUCK Service Repair Manual

21
-
192
TRANSMISSION OVERHAUL—38RH/37RH

•
TRANSMISSION
OVERHAUL—36RH/37RH

INDEX

page
Extension Housing
and
Park Lock Components
. 202

Front
Clutch
Overhaul
210

Front
Servo
and
Band Overhaul
207

Governor
and
Park Gear Overhaul
. 202

Oil Pump
and
Reaction Shaft Support Overhaul
. 208

Overhaul Service
Information
. . 202
Overrunning
Clutch
Overhaul
204

Planetary
Gear
Train
and
Output
Shaft Overhaul
. 214

TRANSMISSION
DISASSEMBLY
(1) Clean transmission exterior with steam
gun
or

solvent. Wear safety goggles while cleaning trans­
mission. (2) Mount transmission
on
Repair Stand C-3750-B
(Fig.
1).

Fig.
1
Transmission
Mounted
On Repair
Stand
C-3750-0

(3) Remove bolts attaching extension housing
to

transmission case. Then remove rear bearing snap
ring access cover from housing (Fig.
2)

(4) Spread rear bearing locating ring with parallel
jaw snap ring pliers
(Fig.
2).
Then work extension housing
off
bearing
and
output shaft. Remove hous­ing gasket after removing housing.
(5) Remove rear bearing
and
snap rings from out­
put shaft (Fig.
3).
Note that
two
snap rings
are
used
to retain bearing
on
36RH.
(6) Remove throttle
and
manual valve levers from
valve body manual shaft. (7) Remove
oil pan
bolts
and
remove
pan
(Fig.
4)

and gasket (Fig.
5). Oil pan
magnet
can
be
removed
page

Rear
Clutch
Overhaul
212

Rear
Servo
and
Band Overhaul
207

Rear
Support
and
Low-Reverse Drum Service
. . 204

Transmission Assembly
and
Adjustment
......
224

Transmission
Case
Cleaning
and
Inspection
. . . 202

Transmission Disassembly
.................
192
Valve Body Service
and
Adjustment
217
Fig.
2
Extension
Housing
Removal—36RH/37RH

Fig.
4
Removing/Installing Oil
Pan-36RH/37RH

•

TRANSMISSION
OVERHAUL—36RH/37RH
21-193
or left in pan as needed (Fig. 6). Exercise care when
removing pan to avoid distorting or bending pan
flange. Fig. 5 Removing/installing Pan Gasket—36RH/37RH
Fig. 6
OH
Pan Magnet Location—36RH/37RH

(8)
Remove neutral switch (Fig. 7). If switch gas­
ket is in good condition, retain gasket and keep it
with switch. Fig. 7 Neutral Switch Removal/Installation (9) Remove three fluid filter attaching screws and
remove filter (Fig. 8). Fig. 8 Fluid Filter Removal/installation—36RH/37RH
(10) Remove hex head valve body attaching bolts
(Fig. 9). Fig. 9 Valve Body Attaching Bolt Locations—36RH/
37RH (11) Lift valve body upward, guide park rod out of
case opening and remove valve body (Fig. 10). Fig. 10 Valve Body Removal/Installation—36RH/
37RH

21
- 194
TRANSMISSION
OVERHAUL—36RH/37RH

• (12) Remove accumulator spring and piston (Fig.

11).
Note position of piston and spring for assembly
reference. Remove and discard piston seals if worn or
cut.

Fig.
11 Removing/Installing
Accumulator
Piston
And
Spring-36RH/37RH

(13) Remove front band lever pin access plug (Fig.

12).
Square end of 1/4 inch drive extension can be
used to remove plug as shown.

Fig.
12 Removing/Installing Front
Band
Lever
Pin
Access
Plug-36RH/37RH

(14) Remove oil pump and reaction shaft support
assembly as follows: (a) Tighten front band adjusting screw until
band is tight around front clutch retainer (Fig. 13). This will prevent retainer from coming out with
pump and possibly damaging clutch or pump com­
ponents.
(b) Remove oil pump bolts.
(c) Thread Slide Hammer Tools C-3752 into
threaded holes in flange of oil pump housing (Fig.
14). Fig.
13 Tightening Front
Band
To
Hold
Front
Clutch

In
PIace-36RH/37RH

Fig.
14 Installing
OH
Pump
Remover
Tools—36RH/
37RH
(d) Remove oil pump and reaction shaft support
by bumping slide hammers outward alternately to
pull pump from case (Fig. 15).
Fig.
15
Removing
Oil
Pump-36RH/37RH

#
,
,
TRANSMISSION
OVERHAUL—38RH/37RH
21 - 115
(15) Remove oil pump gasket (Fig. 16). Note gas­
ket position in case for assembly reference.
Fig.
16 Removing Oil Pump Gasket—36RH/37RH
(16) Loosen front band adjusting screw until band
is completely loose.
(17) Remove front band strut and anchor (Fig. 17).
(18) Squeeze front band together slightly and slide
band over front clutch retainer and out of case (Fig.
18).
LEVER
STRUT

J9121-18

Fig.
17 Front
Band
Linkage-36RH/37RH
Fig. 18 Removing Front
Band—36RH/37RH
(19) Remove front and rear clutch assemblies as a
unit (Fig. 19). Set assemblies aside for disassembly and inspection after removal. Fig. 19 Removing Front And Rear Clutch
Assemblies—36RH/37RH (20) Remove front band reaction pin and lever.
Start pin through lever and out of case bore. Use
pencil magnet to complete pin removal (Fig. 20). (21) Remove triangular shaped thrust washer from
output shaft hub if washer remained on hub during
clutch removal (Fig. 21). Or remove washer from in­
put shaft hub in rear clutch if washer remained in
hub during removal.

21-118
TRANSMISSION
OVERHAUL—36RH/37RH

•

Fig.
20
Removing
Front
Band
Lever
And
Pin—36RH/
37RH

Fig.
21
Removing
Output
Shaft
Thrust
Washer-36RH/37RH
(22)
Remove thrust plate from output shaft hub
(Fig. 22).

Fig.
22
Removing
Output Shaft Thrust Plate-36RH/
37RH
(23) If the output shaft or planetary geartrain
components must be disassembled for service,
continue on to step (24). However, if the shaft
and geartrain components do not need servic­
ing, the shaft and geartrain can be removed as a
unit (Fig. 23). In this case, simply remove the
governor valve shaft, governor and park gear and remove the complete assembly.

Fig.
23
Removing
Output Shaft And Planetary Geartrain-36RH/37RH
(24) Remove planetary gear retaining snap ring
from output shaft (Fig. 24). Retain snap ring if in good condition (it is reusable).
Fig.
24
Removing
Planetary
Snap
Ring—36RH/37RH

(25) Remove front planetary gear and front annu­
lus gear from output shaft as assembly (Fig. 25).
(26) Remove front planetary gear and thrust
washer from front annulus gear (Fig. 26). Note
thrust washer position for assembly reference.

•

TRANSMISSION
OVERHAUL-36RH/37RH
21 - 197
Fig. 25 Removing Front Planetary And Annulus Gears—36RH/37RH
FRONT
Fig. 26 Disassembling Front Planetary And Annulus Gears—36RH/37RH (27) Remove tabbed thrust washer from driving
shell (Fig. 27). Note washer position for assembly
ref­

erence. Fig. 27 Removing Driving Shell Thrust
Washer-36RH/37RH
(28) Remove sun gear and driving shell (Fig. 28).
FRONT
Fig. 28 Removing Sun Gear And Driving Shell-36RH/37RH

21
- 118
TRANSMISSION
OVERHIUL-36RH/37RH

(29) Remove tabbed thrust washer from rear plan- (31) Remove rear planetary thrust plate from rear
etary gear (Fig. 29). Note washer position on gear for annulus gear (Fig. 31). assembly reference.
Fig.
29
Removing
Rear Planetary Thrust

Washer-36RH/37RH
(30)
Remove rear planetary gear from annulus
gear (Fig. 30).
J9121-30

Fig.
30
Removing
Rear Planetary Gear—36RH/37RH
Fig.
31
Removing
Rear Planetary
Plate-36RH/37RH

(32)
Remove rear annulus gear from
(Fig. 32).
J9121-31N

Thrust
output shaft
J9121-32

Fig.
32
Removing
Rear
Annulus
Gear-36RH/37RH

•

TRANSMISSION
OVERHAUL-36RH/37RH
21 - 199 (33) Remove output shaft, park gear and governor
assembly from rear of case (Fig. 33). (36) Slide low-reverse drum off rear support hub
and out of rear band (Fig. 1).
REAR

BAND

AND
LINK

LOCATING

SNAP
RING
Fig.
33
Removing
Output Shaft,
Park
Gear And

Governor
Assembly—36RH/37RH

(34) Loosen rear band adjusting screw. (35) Remove snap ring securing low-reverse drum
to rear support (Fig. 34).
J9221-7

Fig.
35
Removing
Low-Reverse
Drum—36RH/37RH
(37) Note that overrunning clutch race will remain
on splines of low-reverse drum after removal (Fig.
36).
The race is a permanent press fit on the hub
splines. Do not attempt to remove the race.
REAR

BAND
LOW-REVERSE

DRUM

REAR

SUPPORT
OVERRUNNING

CLUTCH
RACE
LOW-REVERSE

DRUM
DRUM

RETAINING
SNAP
RING

J9121-34

Fig.
34
Removing
Low-Reverse
Drum
Snap
Ring—36RH/37RH
J9221-8

Fig.
36 Overrunning
Clutch
Race
Position—36RH/ 37RH