1993 DODGE TRUCK transmission oil

21
- 280
TRANSMISSION
0VERHAUL-46RH
Fig.
11 Oil Pan Magnet Location—46RH (13) Remove park/neutral position switch (Fig. 12).
If switch gasket is in good condition, retain gasket and keep it with switch.
J9321-128
" '
SWITCH
Fig.
12 Park/Neutral Position
Switch
Removal/
Installation
(14) Remove fluid filter attaching screws and re­
move filter (Fig. 13). Keep filter screws separate.
They are longer than valve body screws.
(15) Remove hex head valve body attaching bolts
(Fig. 14). A total of 10 hex head bolts are used to se­
cure valve body to case.
(16) Lift valve body upward. Push solenoid connec­
tor and manual lever shaft out of case. Then raise
valve body, guide park rod out of case and remove valve body (Fig. 15). Do not use boost valve tube
to lift valve body. Set valve body aside for disas­ sembly, cleaning and inspection.
J9321-135

Fig.
14
Valve
Body
Bolt
Locations—46RH
VALVE BOOST

BODY
VALVE

ASSEMBLY
TUBE

PARK
CASE
ROD
CONNECTOR
J9321-136

Fig.
15
Valve
Body
Removal—46RH

•

TRANSMISSION
OVERHAUL-46RH
21 - 281 (17) Remove accumulator outer spring, piston and
inner spring (Fig. 16). Note position of piston and
springs for assembly reference. Remove and discard
piston seals if worn or cut.

ACCUMULATOR
OUTER

Fig.
16
Accumulator
Component
Removal--46RH (18) Remove front band lever pin access plug (Fig.

17).
Use square end of 1/4 in. drive extension to re­
move plug as shown.

Fig.
17 Removing/Installing Front
Band
Lever
Pin
Access
Plug—46RH

(19) 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. 18).
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.

19).
(d) Remove oil pump and reaction shaft support
by bumping slide hammers outward alternately to
pull pump from case (Fig. 20).
Fig.
18 Tightening Front
Band
To
Hold
Front
Clutch

In
Piace-46RH

Fig.
19 Installing Oil
Pump
Remover
Tools—46RH

Fig.
20 Oil
Pump
Removal—46RH

21
- 282
TRANSMISSION OVERHAUL-46RH

• (20) Remove oil pump gasket (Fig. 21). Note gas­
ket position in case for assembly reference.

Fig.
21
Removing
Oil
Pump
Gasket—46RH
(21) Loosen front band adjusting screw until band
is completely loose.
(22) Remove front band strut and anchor (Fig. 22).

LEVER
STRUT

J9121-18

Fig.
22 Front
Band
Linkage—46RH

(23) Squeeze front band together slightly and slide
band over front clutch retainer and out of case (Fig.
23).

(24) Remove front and rear clutch assemblies as a
unit (Fig. 24). Set assemblies aside for disassembly and inspection after removal. (25) Remove front band reaction pin and lever.
Start pin through lever and out of case bore with
drift or punch. Then use pencil magnet to withdraw
pin completely (Fig. 25).
Fig.
24 Removing/Installing Front And Rear
Clutch

Assemblies—46RH

Fig.
25
Removing
Front
Band
Lever
And
Pin—46RH

•

TRANSMISSION
OVERHAUL-46RH
21 - 285 ercise caution when removing snap ring. Servo
bore can be scratched or nicked if care is not
exercised.
(39)
Remove tools and remove servo piston and
spring.
(40)
Compress rear servo piston with C-clamp and
Tool C-4470, or Valve Spring Compressor C-3422-B (Fig. 36). Compress servo spring retainer only
enough to permit snap ring removal.
(41) Remove servo piston snap ring (Fig. 36). Start
one end of ring out of bore. Then carefully work re­
moval tool around back of snap ring until free of ring
groove. Exercise caution when removing snap
ring. Servo bore can be scratched or nicked if care is not exercised.
(42) Remove tools and remove rear servo retainer,
spring and piston assembly.

Fig.
36
Removing
Rear
Servo
Retaining
Snap
Ring—46RH

(43) Remove overdrive piston retainer bolts and re­
move retainer from case (Fig. 37).
(44) Remove gasket from rear of case after remov­
ing piston retainer.

OVERHAUL SERVICE
INFORMATION
Inspect all the transmission bushings during over­
haul. Bushing condition is important as worn, scored
bushings contribute to low pressures, clutch slip and accelerated wear of other components. Replace worn,
or scored bushings, or if doubt exists about bushing
condition. Use recommended tools to replace bushings. The
tools are sized and designed to remove, install and seat bushings correctly. The bushing replacement
tools are included in Bushing Tool Set C-3887-B. Pre-sized service bushings are available for re­
placement purposes. Only the sun gear bushings are not serviced. Low cost of the sun gear assembly makes it easier to simply replace the gear and bush­ings as an assembly.
Fig.
37
Removing
Overdrive
Piston
Retainer—46RH
Heli-Coil inserts are recommended for repairing
damaged, stripped or worn threads in aluminum

parts.
These inserts are available from most automo­
tive jobbers. Stainless steel inserts are preferred.
The use of crocus cloth is permissible where neces­
sary, providing it is used carefully. When used on
valves, use extreme care to avoid rounding off sharp
edges.
Sharp edges are vital as they prevent foreign
matter from getting between the valve and valve

bore.

Do not reuse oil seals, gaskets, seal rings, or
O-rings during overhaul. Replace these parts as a
matter of course. Also do not reuse snap rings or
E-clips that are bent or distorted. Replace these parts as well.
Lubricate transmission parts with Mopar ATF

Plus,
Type 7176 transmission fluid during assembly.
Use Ru-Glyde, petroleum jelly, or Door-Eze to prelu-
bricate seals, O-rings, and thrust washers. Petroleum
jelly can also be used to hold parts in place during reassembly.

TRANSMISSION
CASE
CLEANING
AND
INSPECTION
Clean the case in a solvent tank. Flush the case
bores and fluid passages thoroughly with solvent. Dry the case and all fluid passages with compressed air. Be sure all solvent is removed from the case and
that all fluid passages are clear. Do not use shop towels or rags to dry the case
(or any other transmission component) unless
they are made from lint-free materials. Lint will readily adhere to case surfaces and transmission components and will circulate throughout the

21 - 286
TRANSMISSION OVERHAUL-46RH

• transmission after assembly. A sufficient quan­
tity of lint can block fluid passages and Interfere
with valve body operation.
Inspect the case for cracks, porous spots, worn
servo bores, or damaged threads. Damaged threads
can be repaired with Helicoil thread inserts. How­
ever, the case will have to be replaced if it exhibits
damage or wear.
Lubricate the front band adjusting screw and lock-
nut with petroleum jelly and thread it part way into
the case. Be sure the screw turns freely and does not
bind. Install the locknut on the screw after checking screw thread operation.

OVERDRIVE PISTON AND RETAINER SERVICE
Remove and discard the piston seals.
Clean the piston and retainer in parts cleaning sol­
vent. Do not use any type of caustic materials for
cleaning. Such materials may etch the surfaces caus­
ing damage. Inspect the piston and retainer carefully. Replace
either part if cracked, porous or damaged in any way. Check condition of the locating lugs on the pis­
ton. Be sure the lugs are in good condition and are not worn, chipped or broken. Inspect the check ball in the piston (Fig. 38). Be
sure the ball is secure and is not partially dislodged,
or loose. Replace the piston if doubt exists about pis­
ton or check ball condition. Check the governor feed tube boss in the retainer.
Be sure the boss is in good condition and is not dam­ aged in any way.
Fig.
38 Overdrive
Piston—46RH
OWERRUNNlNG CLUTCH OVERHAUL

Inspect condition of the clutch cam, cage-type re­
tainer, rollers, springs and clutch race. Replace the clutch cam if worn or damaged. Also
check fit of the cam in the transmission case. If the
cam is loose, the case may be worn, or cracked. The clutch race is permanently pressed onto the
low-reverse drum hub. If either the drum or race are
worn or damaged, replace the drum and race as an assembly. Check fit of the race on the low-reverse
drum hub splines. Replace the drum and race as an assembly if the race is loose on the hub splines. Examine the overrunning clutch assembly care­
fully. Replace assembly if the rollers, springs, or cage-type retainer are worn, or damaged. If the clutch cam requires replacement, install a
new cam as described in the following procedure.
OVERRUNNING CLUTCH CAM REPLACEMENT (1) Remove clutch cam setscrew (Fig. 39).

Fig.
39 Removing/Installing
Clutch
Cam
Setscrew—46RH

(2)
Tap old cam and spring retainer out of case
with pin punch. Insert punch through bolt holes at rear of case (Fig. 40). Alternate position of punch to avoid cocking cam during removal.
(3) Clean clutch cam bore and case. Be sure to re­
move all chips/shavings generated during cam re­ moval.
(4) Install rear support in case. Align support with
reference marks made at disassembly. (5) Align and start new clutch cam and spring re­
tainer in case. Be sure serrations on cam and in case are aligned (Fig. 41). Then tap cam into case just
enough to hold it in place.
(6) Verify that cam is correctly positioned be­
fore proceeding any further. Narrow ends of
cam ramps should be to left when cam is viewed
from front end of case (Fig. 41).

21
- 288
TRANSMISSION OVERHAUL-48RH
Fig.
44
Positioning
Puller
Plate
On
Clutch
Cam

Fig.
45 Installing Overrunning
Clutch
Cam—46RH
stall and seat spring in retainer first. Then insert
roller between spring and retainer stop as shown (Fig. 46). Verify that each roller and spring are fully
seated before proceeding.
(3) Install and seat clutch assembly in cam (Fig.

47).
The retainer is a one-way fit in the cam. The
flanged side of the retainer should be facing out­ ward. The retainer and rollers will slip easily
into the cam when properly positioned.
(4) Install low-reverse drum. Tilt drum slightly
and carefully engage clutch race (on drum hub) in
overrunning clutch rollers. Raise drum to level posi­
tion. Then rotate the drum in clockwise direction un­
til fully seated. •

Fig.
47 Overrunning
Clutch
Seated In Cam (5) Check overrunning clutch operation. Low-re­
verse drum should rotate freely in clockwise direc­
tion and lock in counterclockwise direction.
(6) Align and reinstall overdrive piston retainer.
Tighten retainer bolts to 11 N*m (95 in. lbs.) torque.

ACCUMULATOR OVERHAUL
Inspect the accumulator piston and seal rings (Fig.

48).
Replace the seal rings if worn or cut. Replace the
piston if chipped or cracked. Check condition of the accumulator inner and outer
springs (Fig. 48). Replace the springs if the coils are
cracked, distorted or collapsed.

TRANSMISSION
0VERHAUL-46RH
21 - 289

ACCUMULATOR PISTON
INNER

SPRING
OUTER

SPRING

SEAL

RINGS
J9121-230

Fig.
48
Accumulator
Components—46RH

FRONT
SERVO
AND BAND OVERHAUL
Clean the servo piston components with solvent
and dry them with compressed air. Wipe the band
clean with lint free shop towels. Replace the front band if distorted, lining is
burned, flaking off, or worn to the point where the grooves in the lining material are no longer visible. Inspect the servo components. Replace the springs
if collapsed, distorted or broken. Replace the guide,
rod and piston if cracked, bent, or worn. Discard the servo snap ring if distorted or warped. Check the servo piston bore for wear. If the bore is
severely scored, or damaged, it will be necessary to
replace the case. Replace any servo component if in doubt about its
condition. Do not reuse suspect parts.

FRONT
SERVO PISTON OVERHAUL
(FIG. 49) (1) Remove seal ring from rod guide. (2) Remove small snap ring from servo piston rod.
Then remove piston rod, spring and washer from pis­ ton.
(3) Remove and discard servo component O-ring
and seal rings.
(4) Lubricate new O-ring and seal rings with pe­
troleum jelly and install them on piston, guide and rod.
(5) Install rod in piston. Install spring and washer
on rod. Compress spring and install snap ring.
(6) Set servo components aside for installation dur­
ing transmission reassembly.

REAR
SERVO AND BAND OVERHAUL
Clean the servo components with solvent and dry
them with compressed air. Inspect the servo compo­
nents.
Replace the spring if collapsed, distorted or
broken. Replace the plug and piston if cracked, bent, or worn. Discard the servo snap ring if distorted or
warped. Check rear band condition. Replace the band if dis­
torted, the lining is burned or flaking off, or the lin­ ing is worn (grooves no longer visible at any point on
PISTON RINGS
(2)

SERVO
PISTON O" RING PISTON
ROD:

•
SPRING

<
WASHER

.SNAP
RING
PISTON
ROD
GUIDE
PISTON
ROD (A-727
ONLY)'

SERVO
SPRING-
SEAL
RING.
SNAP
RING-
RH307

Fig.
49 Front
Servo
Components—46RH
the lining material). If doubt exists about the condi­
tion of any servo component, replace it. Do not reuse
suspect parts.

REAR
SERVO PISTON OVERHAUL
(FIG. 50) (1) Remove small snap ring and remove plug and
spring from servo piston. (2) Remove and discard servo piston seal ring.
(3) Lubricate piston and guide seals with petro­
leum jelly. Lubricate other servo parts with Mopar
ATF Plus transmission fluid.
(4) Install new seal ring on servo piston.
(5) Assemble piston, plug, spring and snap ring.
(6) Lubricate piston seal lip with petroleum jelly.
(7) Set servo components aside for assembly instal­
lation.

SNAP
RING PISTON

SEAL
PISTON
PLUG
SPRING

RETAINER
SNAP
RING

PISTON CUSHION

SPRING
PISTON

SPRING
J9121-64

Fig.
50 Rear
Servo
Components—46RH

OIL PUMP AND REACTION SHAFT SUPPORT

OVERHAUL

PUMP
AND
SUPPORT DISASSEMBLY
(1) Mark position of support in oil pump body for
assembly alignment reference. Use scriber or paint to
make alignment marks.
(2) Place pump body on two wood blocks. (3) Remove reaction shaft support bolts and sepa­
rate support from pump body (Fig. 51). (4) Remove pump inner and outer gears (Fig. 52).
(5) Remove O-ring seal from pump body (Fig. 53).
Discard seal after removal.

21 - 290
TRANSMISSION OVERHAUL-46RH
•

REACTION SHAFT
SUPPORT GEAR
BORE

J932M76

Fig.
51 Reaction Shaft
Support
Removal—46RH
(6) Remove oil pump seal with Remover Tool

C-3981.
Discard seal after removal.
INSPECTING PUMP AND
SUPPORT
Clean pump and support components with solvent
and dry them with compressed air.
Check condition of the seal rings and thrust
washer on the reaction shaft support. The seal rings do not need to be replaced unless cracked, severely
worn, or no longer hooked together.
PUMP BODY INNER
GEAR OUTER
GEAR
J932M77

Fig.
52
Pump
Gear Removal—46RH
Inspect the pump and support components. Replace
the pump or support if the seal ring grooves or ma­ chined surfaces are worn, scored, pitted, or damaged.
Replace the pump gears if pitted, worn chipped, or
damaged.
Fig.
53 Oil
Pump
And Reaction Shaft
Components—46RH