gear DODGE RAM 1500 1998 2.G Workshop Manual

TRANSMISSION AND TRANSFER CASE
TABLE OF CONTENTS
page page
MANUAL TRANSMISSION - NV3500..........1
MANUAL TRANSMISSION - NV4500..........43
MANUAL TRANSMISSION - NV5600..........88
AUTOMATIC TRANSMISSION - 48RE........130
AUTOMATIC TRANSMISSION - 45RFE/545RFE.311
TRANSFER CASE - NV241 GENII...........415TRANSFER CASE - NV271................447
TRANSFER CASE - NV243................482
TRANSFER CASE - NV244 GENII...........512
TRANSFER CASE - NV273................542
MANUAL TRANSMISSION - NV3500
TABLE OF CONTENTS
page page
MANUAL TRANSMISSION - NV3500
DESCRIPTION..........................1
OPERATION............................1
DIAGNOSIS AND TESTING................3
REMOVAL.............................3
DISASSEMBLY..........................4CLEANING............................15
INSPECTION..........................16
ASSEMBLY............................17
INSTALLATION.........................39
SPECIFICATIONS.......................40
SPECIAL TOOLS.......................40
MANUAL TRANSMISSION -
NV3500
DESCRIPTION
The transmission is a medium-duty 5-speed, con-
stant mesh fully synchronized manual transmission
with fifth gear overdrive range. The transmission is
available in two and four-wheel drive configurations.
The transmission gear case consists of two aluminum
housings (Fig. 1). The clutch housing is an integral
part of the transmission front housing.
A combination of roller and ball bearings are used
to support the transmission shafts in the two hous-
ings. The transmission gears all rotate on caged type
needle bearings. A roller bearing is used between the
input and output shaft.
The transmission has a single shaft shift mecha-
nism with three shift forks all mounted on the shaft.
The shaft is supported in the front and rear housings
by bushings and one linear ball bearing. Internal
shift components consist of the forks, shaft, shift
lever socket and detent components
OPERATION
The manual transmission receives power through the
clutch assembly from the engine. The clutch disc issplined to the transmission input shaft and is turned at
engine speed at all times that the clutch is engaged.
The input shaft is connected to the transmission coun-
tershaft through the mesh of fourth speed gear on the
input shaft and the fourth countershaft gear. At this
point, all the transmission gears are spinning.
The driver selects a particular gear by moving the
shift lever to the desired gear position. This movement
moves the internal transmission shift components to
begin the shift sequence. As the shift lever moves the
selected shift rail, the shift fork attached to that rail
begins to move. The fork is positioned in a groove in the
outer circumference of the synchronizer sleeve. As the
shift fork moves the synchronizer sleeve, the synchro-
nizer begins to speed-up or slow down the selected gear
(depending on whether we are up-shifting or down-shift-
ing). The synchronizer does this by having the synchro-
nizer hub splined to the mainshaft and moving the
blocker ring into contact with the gear's friction cone. As
the blocker ring and friction cone come together, the
gear speed is brought up or down to the speed of the
synchronizer. As the two speeds match, the splines on
the inside of the synchronizer sleeve become aligned
with the teeth on the blocker ring and the friction cone
and eventually will slide over the teeth, locking the gear
to the mainshaft, or countershaft, through the synchro-
nizer.
DRTRANSMISSION AND TRANSFER CASE 21 - 1

DIAGNOSIS AND TESTING
LOW LUBRICANT LEVEL
A low transmission lubricant level is generally the
result of a leak, inadequate lubricant fill or an incor-
rect lubricant level check. Leaks can occur at the
mating surfaces of the gear case, adaptor or exten-
sion housing, or from the front/rear seals. A sus-
pected leak could also be the result of an overfill
condition.
Leaks at the rear of the extension or adapter hous-
ing will be from the housing oil seals. Leaks at com-
ponent mating surfaces will probably be the result of
inadequate sealer, gaps in the sealer, incorrect bolt
tightening or use of a non-recommended sealer.
A leak at the front of the transmission will be from
either the front bearing retainer or retainer seal.
Lubricant may be seen dripping from the clutch
housing after extended operation. If the leak is
severe, it may also contaminate the clutch disc caus-
ing the disc to slip, grab and or chatter.
A correct lubricant level check can only be made
when the vehicle is level. Also allow the lubricant to
settle for a minute or so before checking. These rec-
ommendations will ensure an accurate check and
avoid an underfill or overfill condition. Always check
the lubricant level after any addition of fluid to avoid
an incorrect lubricant level condition.
HARD SHIFTING
Hard shifting is usually caused by a low lubricant
level, improper or contaminated lubricants. The con-
sequence of using non-recommended lubricants is
noise, excessive wear, internal bind and hard shift-
ing. Substantial lubricant leaks can result in gear,
shift rail, synchro, and bearing damage. If a leak
goes undetected for an extended period, the first indi-
cations of component damage are usually hard shift-
ing and noise.
Shift component damage or damaged clutch pres-
sure plate or disc are additional probable causes of
increased shift effort. Worn/damaged pressure plate
or disc can cause incorrect release. If clutch problem
is advanced, gear clash during shifts can result.
Worn or damaged synchro rings can cause gear clash
when shifting into any forward gear. In some new or
rebuilt transmissions, new synchro rings may tend to
stick slightly causing hard or noisy shifts. In most
cases this condition will decline as the rings wear-in.
TRANSMISSION NOISE
Most manual transmissions make some noise dur-
ing normal operation. Rotating gears generate a mild
whine that is audible, but generally only at extreme
speeds.
Severe highly audible transmission noise is gener-
ally the initial indicator of a lubricant problem.
Insufficient, improper or contaminated lubricant will
promote rapid wear of gears, synchros, shift rails,
forks and bearings. The overheating caused by a
lubricant problem, can also lead to gear and bearing
damage.
REMOVAL
(1) Disconnect battery negative cable.
(2) Shift transmission into Neutral.
(3) Remove shift boot bezel screws and slide boot
upward on shift lever extension.
(4) Remove shift lever extension from the shift
tower and lever assembly.
(5) Raise vehicle on hoist.
(6) Remove skid plate, if equipped.
(7) Drain lubricant if transmission will be disas-
sembled for service.
(8) Mark propeller shaft/shafts and companion
flange yoke/yokes for installation reference and
remove propeller shaft/shafts.
(9) Disconnect harness from clips on transmission
housing.
(10) Remove transfer case linkage if equipped.
(11) Remove transfer case mounting nuts and
remove transfer case if equipped.
(12) Remove slave cylinder mounting nut and
remove cylinder (Fig. 2).
Fig. 2 SLAVE CYLINDER
1 - MOUNTING NUTS
2 - SLAVE CYLINDER
DRMANUAL TRANSMISSION - NV3500 21 - 3
MANUAL TRANSMISSION - NV3500 (Continued)

(12) Remove bolts that attach front housing to the
rear housing (Fig. 11). Three bolts at extreme rear of
housing are for the output shaft bearing retainer.
Leave one bolt in place until geartrain is ready to be
removed from case.(13) Separate the housings (Fig. 12) by tapping the
front housing off alignment dowels with a plastic
hammer.
(14) Remove input shaft bearing and countershaft
front bearing race (Fig. 13).
Fig. 11 HOUSING & BEARING RETAINER BOLT
1 - RETAINER BOLTS
2 - HOUSING BOLTS
3 - RETAINER BOLT
4 - HOUSING BOLT LOCATIONS
Fig. 12 FRONT HOUSING
1 - FRONT HOUSING
2 - REAR HOUSING
3 - DOWELS (2)
4 - PLASTIC MALLET
Fig. 13 Input Shaft Bearing and Countershaft Front
Bearing Race
1 - INPUT SHAFT BEARING
2 - FRONT HOUSING
3 - COUNTERSHAFT FRONT BEARING
21 - 6 MANUAL TRANSMISSION - NV3500DR
MANUAL TRANSMISSION - NV3500 (Continued)

(15) Note position of input shaft, shift shaft, forks
and geartrain components in housing (Fig. 14).
SHIFT/FORK SHAFTS AND REVERSE IDLER
SEGMENT
(1) Place a shop towel over the shaft lever to con-
tain the lever detent ball and spring.
(2) Rotate lever and bushing upward out of the
shift forks and catch ball and spring (Fig. 15).
(3) Unseat shift socket roll pin with Remover 6858.
Position remover on shift shaft and center tool over
the roll pin. Verify tool legs are firmly seated on the
shift socket (Fig. 16).
(4) Tilt socket toward the side of the case to avoid
trapping the pin between the gear teeth.
(5) Tighten remover to press the roll pin down-
ward and out of the shift socket (Fig. 16).
NOTE: Roll pin must only clear the shift shaft. Do
not push the pin into the geartrain.
Fig. 14 GEARTRAIN AND SHIFT COMPONENT
1 - SHIFT SHAFT
2 - BUSHING
3 - REAR HOUSING
4 - REVERSE IDLER AND SUPPORT
5 - OUTPUT SHAFT AND GEARS
6 - COUNTERSHAFT
7 - 1-2 FORK
8 - INPUT SHAFT
9 - 3-4 FORK
Fig. 15 DETENT SPRING AND BALL
1 - SHAFT LEVER
2 - SPRING AND BALL
3 - MAGNET
Fig. 16 SHIFT SOCKET
1 - REMOVER
2 - SHIFT SOCKET
DRMANUAL TRANSMISSION - NV3500 21 - 7
MANUAL TRANSMISSION - NV3500 (Continued)

(11) Remove reverse idler shaft support bolt and
loosen rear reverse idler shaft bolt (Fig. 22).
(12) Remove reverse idler shaft support segment
by sliding it straight out of housing.
(13) Support geartrain and rear housing on Fix-
ture 6747 as follows:
(a) Adjust height of reverse idler pedestal rod
until the reverse idle shaft bottoms in Cup 8115.
(b) Position Adapters 6747-1A and 6747-2A on
Fixture 6747.
(c) Slide fixture tool onto input shaft, counter-
shaft and idler gear (Fig. 23).
(d) Stand geartrain and rear housing upright on
fixture (Fig. 24). Have helper hold fixture tool in
place while housing and geartrain is being rotated
into upright position.(14) Remove rear bolt holding reverse idler shaft
in housing.
Fig. 22 REVERSE IDLER SHAFT & SUPPORT
1 - SUPPORT BOLT
2 - SHAFT BOLT
Fig. 23 FIXTURE ASSEMBLY
1 - FIXTURE 6747
2 - ADAPTER 6747-1A
3 - CUP ADAPTER 8115
4 - REVERSE IDLER PEDESTAL
5 - ADAPTER 6747-2A
Fig. 24 GEARTRAIN & HOUSING ON FIXTURE
1 - INPUT SHAFT
2 - COUNTERSHAFT
3 - FIXTURE 6747
DRMANUAL TRANSMISSION - NV3500 21 - 9
MANUAL TRANSMISSION - NV3500 (Continued)

REAR HOUSING - 2WD
(1) On 2-wheel drive transmission, remove three
bolts that attach output shaft bearing retainer to
rear case (Fig. 25). Bolts are rear of shift tower open-
ing.
(2) Tap rear housing upward and off output shaft
bearing with a plastic/rawhide hammer (Fig. 26).
(3) Lift rear housing up and off geartrain (Fig. 27).
Fig. 26 SEPARATE REAR HOUSING & OUTPUT
SHAFT BEARING
1 - REAR HOUSING
2 - MALLET
3 - FIXTURE
Fig. 27 REAR HOUSING - 2WD
1 - REAR HOUSING
2 - SHIFT FORKS AND GEARTRAIN
Fig. 25 OUTPUT SHAFT
1 - OUTPUT SHAFT BEARING RETAINER BOLTS (THIRD BOLT
IS AT OPPOSITE SIDE OF CASE)
21 - 10 MANUAL TRANSMISSION - NV3500DR
MANUAL TRANSMISSION - NV3500 (Continued)

(4) Remove countershaft rear bearing from coun-
tershaft (Fig. 28).
REAR ADAPTER HOUSING - 4WD
(1) Inserting screw from slide hammer (Fig. 29)
into one of the dimples in face of rear seal (Fig. 30)
and remove seal.
(2) Remove rear bearing snap ring from output
shaft (Fig. 31).
(3) Lift rear adapter housing upward and off
geartrain (Fig. 32).
(4) Remove bearing retainer bolts and remove rear
bearing retainer and rear bearing (Fig. 33). Push or
tap bearing out of housing with a hammer handle if
needed.
Fig. 28 COUNTERSHAFT REAR BEARING
1 - COUNTERSHAFT REAR BEARING
2 - OUTPUT SHAFT
3 - COUNTER SHAFT
Fig. 29 REAR SEAL
1 - SLIDE HAMMER
2 - REMOVER TOOL
3 - REAR SEAL
Fig. 30 REAR SEAL FACE
1 - DIMPLES
2 - SEAL FACE
Fig. 31 REAR BEARING SNAP RING
1 - HEAVY DUTY SNAP RING PLIERS
2 - REAR BEARING SNAP RING
3 - OUTPUT SHAFT
Fig. 32 REAR ADAPTER HOUSING
1 - REAR ADAPTER HOUSING
2 - OUTPUT SHAFT
DRMANUAL TRANSMISSION - NV3500 21 - 11
MANUAL TRANSMISSION - NV3500 (Continued)

NOTE: Housing must be replaced if race, bearing
bore or idler shaft notch are worn or damaged.
GEARTRAIN FROM FIXTURE
(1) Remove reverse idler gear assembly from
assembly fixture cup.
(2) Remove 1-2 and fifth-reverse forks from syn-
chro sleeves.
(3) Slide countershaft out of fixture tool.
(4) Remove output shaft bearing retainer from
rear surface of fifth gear (retainer will drop onto gear
after bolts are removed).
(5) Lift and remove output shaft and gears off
input shaft.
(6) Lift and remove input shaft, pilot bearing and
fourth gear synchro ring from the fixture.
OUTPUT SHAFT
NOTE: Synchronizer hubs and sleeves are different
and must not be mixed. Remove each synchronizer
unit as an assembly to avoid mixing parts. Mark
each synchro hub and sleeve with a scriber or paint
for correct assembly reference.(1) Remove snap ring that secures 3-4 synchro hub
on output shaft.
(2) Position Bearing Splitter 1130 between second
and third gears and press off 3-4 synchro assembly,
third gear synchro ring and third gear with a shop
press.
(3) Remove third gear needle bearing (Fig. 34).
(4) Remove retaining ring that secures two-piece
thrust washer on shaft with a small pry tool (Fig.
35).
Fig. 33 REAR ADAPTER HOUSING COMPONENTS
1 - BEARING RETAINER
2 - RETAINER BOLTS (3)
3 - IDLER SHAFT NOTCH
4 - COUNTERSHAFT REAR BEARING RACE
5 - REAR BEARING
Fig. 34 THIRD GEAR NEEDLE BEARING
1 - THIRD GEAR NEEDLE BEARING
Fig. 35 THRUST WASHER
1-PRYTOOL
2 - THRUST WASHER RETAINING RING
21 - 12 MANUAL TRANSMISSION - NV3500DR
MANUAL TRANSMISSION - NV3500 (Continued)

(5) Remove two-piece thrust washer (Fig. 36) and
note position of washer locating lugs in shaft notches
for installation reference.
(6) Remove second gear and needle bearing (Fig.
37).
(7) Remove second gear synchro ring, synchro fric-
tion cone, synchro cone and interm ring (Fig. 38).
(8) Remove 1-2 synchro hub snap ring.
(9) Position Bearing Splitter 1130 between first
and reverse gear. Press off 1-2 synchro hub, sleeve
and first gear from output shaft with shop press (Fig.
39).
(10) Remove first gear needle bearing (Fig. 40).
Fig. 36 TWO-PIECE THRUST WASHER
1 - SECOND GEAR
2 - THRUST WASHER (2-PIECE)
3 - WASHER LOCATING LUG
Fig. 37 SECOND GEAR
1 - SECOND GEAR
2 - SECOND GEAR NEEDLE BEARING
Fig. 38 SECOND GEAR SYNCHRO RING & CONES
1 - 1-2 SYNCHRO HUB AND SLEEVE
2 - INTERM RING
3 - SYNCHRO FRICTION CONE
4 - SYNCHRO CONE
5 - SYNCHRO RING
Fig. 39 HUB SLEEVE & 1-2 SYNCHRO
1 - 1-2 SYNCHRO HUB AND SLEEVE
2 - BEARING SPLITTER 1130
Fig. 40 FIRST GEAR NEEDLE BEARING
1 - FIRST GEAR NEEDLE BEARING
DRMANUAL TRANSMISSION - NV3500 21 - 13
MANUAL TRANSMISSION - NV3500 (Continued)

(11) Remove output shaft bearing snap ring (Fig.
41).
(12) On 2-wheel drive models, remove output shaft
bearing.
(13) Remove fifth gear (Fig. 42).(14) Remove fifth gear needle bearing. Spread
bearing just enough to clear shoulder on output shaft
(Fig. 43).
(15) Remove fifth-reverse synchro hub snap ring
(Fig. 44).
Fig. 41 OUTPUT SHAFT BEARING SNAP RING
1 - OUTPUT SHAFT BEARING
2 - BEARING SNAP RING
3 - SNAP RING PLIERS
Fig. 42 FIFTH GEAR
1 - FIFTH GEAR AND SYNCHRO RING
Fig. 43 FIFTH GEAR NEEDLE BEARING
1 - FIFTH GEAR NEEDLE BEARING
Fig. 44 FIFTH-REVERSE SYNCHRO HUB SNAP
RING
1 - FIFTH-REVERSE SYNCHRO HUB AND SLEEVE
2 - SYNCHRO HUB SNAP RING
3 - SNAP RING PLIERS
21 - 14 MANUAL TRANSMISSION - NV3500DR
MANUAL TRANSMISSION - NV3500 (Continued)