(10) Install shuttle valve primary spring and
throttle plug.
(11) Align and install governor plug cover. Tighten
cover screws to 4 N´m (35 in. lbs.) torque.
BOOST VALVE TUBE AND BRACE
(1) Position valve body assembly so lower housing
is facing upward (Fig. 305).
(2) Lubricate tube ends and housing ports with
transmission fluid or petroleum jelly.
(3) Start tube in lower housing port first. Then
swing tube downward and work opposite end of tube
into upper housing port (Fig. 305).(4) Insert and seat each end of tube in housings.
(5) Slide tube brace under tube and into alignment
with valve body screw holes (Fig. 306).
(6) Install and finger tighten three screws that
secure tube brace to valve body housings (Fig. 306).
(7) Bend tube brace tabs up and against tube to
hold it in position (Fig. 307).
(8) Tighten all valve body housing screws to 4 N´m
(35 in. lbs.) torque after tube and brace are installed.
Tighten screws in diagonal pattern starting at center
and working outward.
Fig. 303 Upper Housing Control Valve Locations
1 - UPPER HOUSING 8 - MANUAL VALVE
2 - REGULATOR VALVE 9 - 1-2 GOVERNOR PLUG
3 - SWITCH VALVE 10 - GOVERNOR PLUG COVER
4 - REGULATOR VALVE SPRING 11 - THROTTLE PLUG
5 - KICKDOWN VALVE 12 - 2-3 GOVERNOR PLUG
6 - KICKDOWN DETENT 13 - SHUTTLE VALVE PRIMARY SPRING
7 - THROTTLE VALVE AND SPRING
21 - 814 AUTOMATIC TRANSMISSION - 47REBR/BE
VALVE BODY (Continued)
PTO CAPABILITY
The NV241HD transfer case has power take-off
capability. A PTO gear permanently attached to the
planetary carrier, and a removable PTO cover are
provided for this purpose.
IDENTIFICATION
An identification tag (Fig. 2) is attached to the rear
case of every transfer case. The tag provides the
transfer case model number, assembly number, serial
number, and low range ratio.
The transfer case serial number also represents
the date of build.
OPERATION
OPERATING RANGES
Transfer case operating ranges are:
²2H (2-wheel drive)
²4H (4-wheel drive)
²4LO (4-wheel drive low range)The 2H range is for use on any road surface at any
time.
The 4H and 4LO ranges are for off road use only.
They are not for use on hard surface roads. The only
exception being when the road surface is covered by
ice and snow or other loose, slippery material.
The low range reduction gear system is operative
in 4LO range only. This range is for extra pulling
power in off road situations. Low range reduction
ratio is 2.72:1.
A front axle disconnect system is used to achieve
two-wheel drive mode. The axle disconnect vacuum
motor is actuated by a vacuum switch on the transfer
case. The switch is operated by the transfer case
range rod.
SHIFT MECHANISM
The transfer case is operated by an adjustable floor
mounted shift linkage. The transfer case shift lever
is directly attached to the shift sector. The sector
operates the range and mode forks within the trans-
fer case.
A straight line shift pattern is used with a NEU-
TRAL detent. Lever range positions are imprinted in
the shift knob.
SHIFTING
The synchronizer components allow the transfer
case to be shifted between the 2H and 4H operating
ranges while the vehicle is in motion. The vehicle
must have the transmission placed in NEUTRAL, or
the clutch depressed in the case of a manual trans-
mission, and be moving less than 2-3 MPH when
shifting into the 4L operating range.
DIAGNOSIS AND TESTING - TRANSFER CASE
Before beginning repair on a suspected transfer
case malfunction, check all other driveline compo-
nents beforehand.
The actual cause of a problem may be related to
such items as: front hubs, axles, propeller shafts,
wheels and tires, transmission, or clutch instead. If
all other driveline components are in good condition
and operating properly, refer to the Diagnosis Chart
for further information.
Fig. 2 Transfer Case Identification Tag - Typical
1 - I.D. TAG
2 - FILL PLUG
3 - DRAIN PLUG
21 - 892 TRANSFER CASE - NV241HDBR/BE
TRANSFER CASE - NV241HD (Continued)
OPERATION
The wheel (Fig. 19) has raised sections between
the rim flanges and the rim well. Initial inflation of
the tire forces the bead over these raised sections. In
case of tire failure, the raised sections hold the tire
in position on the wheel until the vehicle can be
brought to a safe stop.
DIAGNOSIS AND TESTING - WHEEL
INSPECTION
Inspect wheels for:
²Excessive run out
²Dents or cracks
²Damaged wheel lug nut holes
²Air Leaks from any area or surface of the rim
NOTE: Do not attempt to repair a wheel by hammer-
ing, heating or welding.
If a wheel is damaged an original equipment
replacement wheel should be used. When obtaining
replacement wheels, they should be equivalent in
load carrying capacity. The diameter, width, offset,
pilot hole and bolt circle of the wheel should be the
same as the original wheel.
WARNING: FAILURE TO USE EQUIVALENT
REPLACEMENT WHEELS MAY ADVERSELY
AFFECT THE SAFETY AND HANDLING OF THE
VEHICLE. USED WHEELS ARE NOT RECOM-
MENDED. THE SERVICE HISTORY OF THE WHEEL
MAY HAVE INCLUDED SEVERE TREATMENT OR
VERY HIGH MILEAGE. THE RIM COULD FAIL WITH-
OUT WARNING.
STARDARD PROCEDURE - DUAL REAR WHEEL
INSTALLATION
Dual rear wheels use a special heavy duty lug nut
wrench. It is recommended to remove and install
dual rear wheels only when the proper wrench is
available. The wrench is also use to remove wheel
center caps for more information refer to Owner's
Manual.
The tires on both wheels must be completely raised
off the ground when tightening the lug nuts. This
will ensure correct wheel centering and maximum
wheel clamping.
A two piece flat face lug nut with right-hand
threads is used for retaining the wheels on the hubs
(Fig. 20).
The dual rear wheel lug nuts should be tightened
according to the following procedure:
²Place two drops of oil to the interface of the nut/
washer (Fig. 20) before installing on the wheel stud.
NOTE: Do not use more then two drops of oil on
the nut/washer, since the center caps attach in this
area.
²Tighten the wheel lug nuts in the numbered
sequential pattern until they are snug tight. Then
tighten lug nut to specified torque following same
number sequence, (Refer to 22 - TIRES/WHEELS/
WHEELS - SPECIFICATIONS).
Fig. 18 Dual Rear Wheels
1 - INBOARD WHEEL VALVE STEM
2 - OUTBOARD WHEEL VALVE STEM
Fig. 19 Safety Rim
1 - FLANGE
2 - RIDGE
3 - WELL
22 - 10 TIRES/WHEELSBR/BE
WHEELS (Continued)
PARK/TURN SIGNAL LAMP -
INSTALLATION.......................8L-29
PARK/TURN SIGNAL LAMP - REMOVAL . . . 8L-29
PARK/TURN SIGNAL LAMP UNIT -
INSTALLATION.......................8L-29
PARK/TURN SIGNAL LAMP UNIT -
REMOVAL..........................8L-29
PARTS - STANDARD PROCEDURES,
CLEANING FUEL SYSTEM..............14-57
PASSENGER AIRBAG - DESCRIPTION....8O-21
PASSENGER AIRBAG - INSTALLATION....8O-23
PASSENGER AIRBAG - OPERATION......8O-21
PASSENGER AIRBAG - REMOVAL........8O-21
PASSENGER AIRBAG ON/OFF SWITCH -
DESCRIPTION.......................8O-23
PASSENGER AIRBAG ON/OFF SWITCH -
INSTALLATION......................8O-25
PASSENGER AIRBAG ON/OFF SWITCH -
OPERATION.........................8O-24
PASSENGER AIRBAG ON/OFF SWITCH -
REMOVAL..........................8O-24
PASSENGER POWER SEAT SWITCH -
DESCRIPTION.......................8N-19
PASSENGER POWER SEAT SWITCH -
DIAGNOSIS & TESTING...............8N-19
PASSENGER POWER SEAT SWITCH -
INSTALLATION......................8N-20
PASSENGER POWER SEAT SWITCH -
OPERATION.........................8N-19
PASSENGER POWER SEAT SWITCH -
REMOVAL..........................8N-20
PASSENGER SEAT HEATER SWITCH -
DESCRIPTION.......................8G-13
PASSENGER SEAT HEATER SWITCH -
INSTALLATION......................8G-16
PASSENGER SEAT HEATER SWITCH -
OPERATION.........................8G-14
PASSENGER SEAT HEATER SWITCH -
REMOVAL..........................8G-15
PATTERNS - DIAGNOSIS AND TESTING,
TIRE WEAR..........................22-7
PCM - DESCRIPTION..................8E-14
PCM - GAS ENGINES - OPERATION......8E-17
PCM INPUT - OPERATION, ASD SENSE.....8I-3
PCM OUTPUT - DESCRIPTION............8I-3
PCM OUTPUT - OPERATION............14-53
PCM OUTPUT - OPERATION.............8I-3
PCV FILTER - DESCRIPTION............25-35
PCV VALVE - V-6/V-8 ENGINES -
DIAGNOSIS AND TESTING.............25-36
PEDAL - DESCRIPTION.................5-16
PEDAL - INSTALLATION............5-17,5-36
PEDAL - INSTALLATION, ACCELERATOR . . . 14-37
PEDAL - INSTALLATION, CLUTCH.........6-19
PEDAL - OPERATION...................5-16
PEDAL - REMOVAL................5-16,5-36
PEDAL - REMOVAL, ACCELERATOR......14-37
PEDAL - REMOVAL, CLUTCH............6-18
PEDAL POSITION SENSOR -
DESCRIPTION, ACCELERATOR..........14-91
PEDAL POSITION SENSOR -
INSTALLATION, ACCELERATOR..........14-93
PEDAL POSITION SENSOR - OPERATION,
ACCELERATOR.......................14-91
PEDAL POSITION SENSOR - REMOVAL,
ACCELERATOR.......................14-91
PEDAL POSITION SWITCH -
DESCRIPTION, CLUTCH.................6-22
PEDAL POSITION SWITCH - OPERATION,
CLUTCH.............................6-22
PER MILE, SPECIFICATIONS - TIRE
REVOLUTIONS........................22-9
PERFORMANCE - DIAGNOSIS AND
TESTING...............9-118,9-173,9-4,9-61
PERFORMANCE - DIAGNOSIS AND
TESTING, A/C........................24-2
PERFORMANCE - DIAGNOSIS AND
TESTING, HEATER.....................24-6
PERFORMANCE - INSPECTION, ENGINE . . . 30-16
PILOT BEARING - DESCRIPTION..........6-17
PILOT BEARING - INSTALLATION.........6-18
PILOT BEARING - OPERATION
...........6-18
PILOT BEARING - REMOVAL
.............6-18
PINION GEAR/RING GEAR -
INSTALLATION
....................3-42,3-74
PINION GEAR/RING GEAR - REMOVAL
. 3-40,3-72
PINION GEAR/RING GEAR/TONE RING -
INSTALLATION
........3-105,3-137,3-166,3-195PINION GEAR/RING GEAR/TONE RING -
REMOVAL...........3-103,3-135,3-165,3-193
PINION SEAL - INSTALLATION.....3-125,3-157,
3-185,3-34,3-66,3-95
PINION SEAL - REMOVAL . . . 3-125,3-156,3-185,
3-34,3-66,3-95
PIPE - 3.9L/5.2L/5.9L - INSPECTION,
EXHAUST............................11-7
PIPE - 3.9L/5.2L/5.9L - INSTALLATION,
EXHAUST............................11-7
PIPE - 3.9L/5.2L/5.9L - REMOVAL,
EXHAUST............................11-7
PIPE - 5.9L DIESEL - INSPECTION,
EXHAUST............................11-9
PIPE - 5.9L DIESEL - INSTALLATION,
EXHAUST...........................11-10
PIPE - 5.9L DIESEL - REMOVAL,
EXHAUST............................11-9
PIPE - 5.9L HEAVY DUTY/8.0L -
INSPECTION, EXHAUST.................11-9
PIPE - 5.9L HEAVY DUTY/8.0L -
INSTALLATION, EXHAUST...............11-9
PIPE - 5.9L HEAVY DUTY/8.0L -
REMOVAL, EXHAUST...................11-8
PISTON & CONNECTING ROD -
CLEANING........9-154,9-209,9-285,9-41,9-98
PISTON & CONNECTING ROD -
CONNECTING RODS..................9-286
PISTON & CONNECTING ROD -
DESCRIPTION.....9-153,9-208,9-282,9-40,9-97
PISTON & CONNECTING ROD -
INSPECTION......9-154,9-209,9-285,9-41,9-98
PISTON & CONNECTING ROD -
INSTALLATION......9-154,9-210,9-287,9-41,9-98
PISTON & CONNECTING ROD -
REMOVAL........9-154,9-209,9-285,9-40,9-97
PISTON FITTING - STANDARD
PROCEDURE...........9-153,9-208,9-40,9-97
PISTON GRADING - STANDARD
PROCEDURE........................9-282
PISTON RETAINER - ASSEMBLY,
OVERRUNNING CLUTCH CAM/
OVERDRIVE
......21-236,21-406,21-581,21-752
PISTON RETAINER - CLEANING,
OVERRUNNING CLUTCH CAM/
OVERDRIVE
......21-236,21-406,21-580,21-752
PISTON RETAINER - DESCRIPTION,
OVERRUNNING CLUTCH CAM/
OVERDRIVE
......21-235,21-405,21-580,21-751
PISTON RETAINER - DISASSEMBLY,
OVERRUNNING CLUTCH CAM/
OVERDRIVE
......21-235,21-405,21-580,21-751
PISTON RETAINER - INSPECTION,
OVERRUNNING CLUTCH CAM/
OVERDRIVE
......21-236,21-406,21-580,21-752
PISTON RETAINER - OPERATION,
OVERRUNNING CLUTCH CAM/
OVERDRIVE
......21-235,21-405,21-580,21-751
PISTON RING FITTING - STANDARD
PROCEDURE
................9-154,9-41,9-98
PISTON RINGS - STANDARD
PROCEDURE, FITTING
.................9-211
PISTON RINGS - STANDARD
PROCEDURE-PISTON RING FITTING
......9-288
PISTONS - DESCRIPTION
. 21-238,21-408,21-584,
21-755
PISTONS - OPERATION
. . 21-238,21-409,21-584,
21-755
PITMAN BEARING - INSTALLATION
......19-21
PITMAN BEARING - REMOVAL
..........19-20
PITMAN SHAFT - INSTALLATION
........19-23
PITMAN SHAFT - REMOVAL
............19-22
PITMAN SHAFT SEAL - INSTALLATION
....19-24
PITMAN SHAFT SEAL - REMOVAL
.......19-23
PLANETARY GEARTRAIN/OUTPUT
SHAFT - ASSEMBLY
.....21-241,21-412,21-588,
21-760
PLANETARY GEARTRAIN/OUTPUT
SHAFT - DESCRIPTION
. . . 21-240,21-410,21-585,
21-757
PLANETARY GEARTRAIN/OUTPUT
SHAFT - DISASSEMBLY
. . 21-240,21-411,21-586,
21-757
PLANETARY GEARTRAIN/OUTPUT
SHAFT - INSPECTION
....21-241,21-411,21-587,
21-760PLANETARY GEARTRAIN/OUTPUT
SHAFT - OPERATION....21-240,21-410,21-585,
21-757
PLATE - DESCRIPTION, BODY CODE....Intro.-1
PLATE - DESCRIPTION, ENGINE DATA....9-244
PLATE - DESCRIPTION, EQUIPMENT
IDENTIFICATION...................Intro.-12
PLATE - DESCRIPTION, PRESSURE.......6-15
PLATE - INSTALLATION, SUPPORT........5-32
PLATE - INSTALLATION, TRANSFER
CASE SKID.........................13-11
PLATE - OPERATION, PRESSURE.........6-16
PLATE - REMOVAL, SUPPORT...........5-32
PLATE - REMOVAL, TRANSFER CASE
SKID..............................13-11
PLATE LAMP - INSTALLATION, LICENSE . . 8L-22
PLATE LAMP - REMOVAL, LICENSE......8L-22
PLATE LAMP UNIT - INSTALLATION,
LICENSE...........................8L-22
PLATE LAMP UNIT - REMOVAL, LICENSE . . 8L-22
PLATE, SPECIFICATIONS - FUEL
INJECTION PUMP DATA...............14-73
PLATES - INSTALLATION, EXTERIOR
NAME.............................23-89
PLATES - REMOVAL, EXTERIOR NAME....23-89
PLUG - CLEANING, SPARK.............8I-19
PLUG - DESCRIPTION, SPARK...........8I-16
PLUG - INSTALLATION, SPARK..........8I-19
PLUG - INSTALLATION, STEERING GEAR
HOUSING............................19-27
PLUG - OPERATION, SPARK............8I-16
PLUG - REMOVAL, SPARK..............8I-18
PLUG - REMOVAL, STEERING GEAR
HOUSING...........................19-27
PLUG CABLE - DESCRIPTION, SPARK.....8I-19
PLUG CABLE - INSTALLATION, SPARK....8I-20
PLUG CABLE - OPERATION, SPARK.......8I-19
PLUG CABLE - REMOVAL, SPARK........8I-20
PLUG CABLE ORDER, 8.0L V-10 ENGINE
- SPARK .............................8I-2
PLUG CABLE RESISTANCE,
SPECIFICATIONS - SPARK...............8I-3
PLUG CABLES - DIAGNOSIS AND
TESTING, SPARK.....................8I-19
PLUG CONDITIONS - DIAGNOSIS AND
TESTING, SPARK.....................8I-16
PLUGS, SPECIFICATIONS - SPARK........8I-3
PLUMBING - CLEANING, CHARGE AIR
COOLER............................11-18
PLUMBING - DESCRIPTION............24-40
PLUMBING - DESCRIPTION, CHARGE
AIR COOLER........................11-17
PLUMBING - INSPECTION, CHARGE AIR
COOLER............................11-18
PLUMBING - INSTALLATION, CHARGE
AIR COOLER........................11-18
PLUMBING - OPERATION..............24-41
PLUMBING - OPERATION, CHARGE AIR
COOLER............................11-17
PLUMBING - REMOVAL, CHARGE AIR
COOLER............................11-17
POLISHING - DESCRIPTION, WET
SANDING/BUFFING..................23-130
PORT - DESCRIPTION, REFRIGERANT
SYSTEM SERVICE.....................24-1
PORT - OPERATION, REFRIGERANT
SYSTEM SERVICE.....................24-2
POSITION SENSOR - DESCRIPTION,
ACCELERATOR PEDAL.................14-91
POSITION SENSOR - DESCRIPTION,
THROTTLE..........................14-51
POSITION SENSOR - INSTALLATION,
ACCELERATOR PEDAL.................14-93
POSITION SENSOR - OPERATION,
ACCELERATOR PEDAL.................14-91
POSITION SENSOR - OPERATION,
THROTTLE..........................14-51
POSITION SENSOR - REMOVAL,
ACCELERATOR PEDAL
.................14-91
POSITION SWITCH - DESCRIPTION,
CLUTCH PEDAL
.......................6-22
POSITION SWITCH - DIAGNOSIS AND
TESTING, PARK/NEUTRAL
......21-237,21-408,
21-583,21-755
POSITION SWITCH - INSTALLATION,
PARK/NEUTRAL
. . . 21-238,21-408,21-583,21-755
POSITION SWITCH - OPERATION,
CLUTCH PEDAL
.......................6-22
BR/BEINDEX 25
Description Group-Page Description Group-Page Description Group-Page