12-INCH RING GEAR (ROCKWELL) 4 B 6 -1
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SECTION 4B6
12-INCH RING GEAR (ROCKWELL)
CONTENTS
S U B J E C T
P A G E
D escrip tio n ............................................................................................................................................................................... 4 B 6 - 1
Disassembly of the Rear A xle ............................................................................................................................................. 4 B 6 - 1
C le a n in g .................................................................................................................................................................................... 4 B 6 - 5
Inspection..................................................................................................................................................................................4 B 6 - 5
Assembly of the Rear A x le ..................................................................................................................................................4 B 6 - 6
S p e c ific a tio n s ............................................................................................................................................................................. 4 B 6 -1 0
Special T o o ls ............................................................................................................................................................................... 4B6-11
DESCRIPTION
The Rockwell 12-inch ring gear rear axle uses a
conventional ring and pinion gear set to transm it the
driving force of the engine to the rear wheels, this gear set
transfers this driving force at a 90 degree angle from the
propeller shaft to the drive shafts.
This axle is full-floating. The axle shaft is supported at
the wheel ends by the wheel hubs. The rear axle shaft is
held into the rear axle by an axle cap bolted to the hub.
The splined end of the sh aft is su pp orte d by the
differential.
This axle uses a differential carrier, separate from the
axle housing. This differential carrier holds the entire
drive gear set, the differential bearings and adjusting
nuts, and the differential bearing caps. The pinion cage is
bolted to the differential cage.
The pinion gear is supported in a pinion cage by three
bearings: a pinion front bearing, a pinion inner bearing,
and a pinion rear or pilot bearing. The pinion cage is
separate from the axle housing. Selective shims are used
between the pinion cage and the axle housing to set the
pinion depth.
The ring gear is bolted onto the differential case with
right-hand thread bolts.
The differential case is supported in the case by two
tapered roller bearings. The differential and ring gear are
located in re la tio n s h ip to the p in ion by using two
d ifferen tia l bearing adjusting nuts. These allow the
differential to be moved from side to side by adjusting the
nuts in or out. The differential side bearing preload is
a cco m p lish e d by tig h te n in g the d iffe re n tia l bearing
adjusting nuts after the ring gear backlash has been set.
Two bearing caps are used to hold the differential into the
differential carrier as well as to supply half of the threads
for the bearing adjusting nuts.
The differential is used to allow the wheels to turn at
different rates of speed while the rear axle continues to
transm it the driving force. This prevents tire scuffing when
going around corners and prevents premature wear on
internal axle parts.
The rear axle is sealed with a pinion seal, a gasket at
each axle shaft end, and by a gasket between the rear
axle housing and the differential carrier.
The Rockwell axle is identified by the model num ber on
the carrier. This axle has a separate carrier, an overhung
pinion, and incorporates disk brakes.
DISASSEMBLY OF THE
REAR AXLE
R em ove or D isconnect (Figures 1 and 2)
Tools Required:
J 22912 Split Type Puller Plate
J 7804-01 Pinion Flange Puller
J 22912 Rear Pinion Bearing Remover
J 3453 Pinion Flange Holding Bar
• Drain the axle lubricant from the housing.
1. Axle shafts. Refer to the proper service manual.
2. Carrier to housing bolts (47) and washers (45).
• Loosen but do not remove the two upper bolts
to keep the carrier from falling.
3. Carrier (46) from the axle housing.
• Using a roller jack, support the carrier, and
remove it from the axle housing.
• Use a rawhide hammer to break the carrier
loose from the housing.
• Remove the two upper bolts (47).
• Place the carrier in a suitable holding fixture (figure
3).
Summary of Contents for 1989 Light Duty Truck
Page 1: ...vr V Light Duty Truck Unit Repair Manual...
Page 2: ......
Page 11: ...GENERAL INFORMATION OA 5 Figure 8 RV Models...
Page 13: ...GENERAL INFORMATION OA 7 Figure 11 ST Models...
Page 18: ......
Page 44: ......
Page 76: ...1B3 18 R 4 AIR CONDITIONING COMPRESSOR N...
Page 114: ......
Page 162: ......
Page 176: ...4B3 14 91 2 INCH RING GEAR...
Page 192: ...4B5 4 DANA REAR AXLES Figure 4 Spreading the Differential Case Figure 7 Removing the Ring Gear...
Page 218: ......
Page 220: ...4B6 2 12 INCH RING GEAR ROCKWELL F 04734 Figure 1 Rear Axle Components...
Page 229: ...12 INCH RING GEAR ROCKWELL 4B6 11 SPECIAL TOOLS Special Tools...
Page 230: ...4B6 12 12 INCH RING...
Page 240: ...4B7 10 LOCKING DIFFERENTIALS SPECIAL TOOLS Special Tools...
Page 260: ...4C2 6 93 4 INCH RING GEAR FRONT AXLE Figure 16 Removing the Pinion Inner Bearing...
Page 273: ...T TRUCK FRONT AXLE 4C3 3 F 05785 Figure 1 Axle Components...
Page 291: ...K TRUCK FRONT AXLE 4C4 3 Figure 1 Front Axle Com ponents K 15 25 Models...
Page 293: ...K TRUCK FRONT AXLE 4C4 5 Figure 3 Front Axle Com ponents K35 Models...
Page 318: ...C4 30 K TRUCK FBOHT AXLE...
Page 334: ......
Page 361: ...2 5 LITER L4 ENGINE 6A1 5 Figure 3 Cylinder Head Manifolds and Components...
Page 363: ...2 5 LITER L4 ENGINE 6A1 7 F 05715 Figure 5 Block and Components...
Page 395: ...2 8 LITER V 6 6A2 3 Figure 1 Engine Lubrication Diagram...
Page 396: ...6A2 4 2 8 LITER V 6 Figure 2 Engine Lubrication Diagram...
Page 424: ...6A2 32 2 8 LITER V 6...
Page 427: ...I 4 3 LITER V 6 6A3 3 Figure 1 Engine Lubrication Diagram B 07857...
Page 451: ...4 3 LITER V 6 6A3 27 SPECIFICATIONS ENGINE SPECIFICATIONS F 6344...
Page 457: ...4 8 LITER L6 6A4 3 Figure 2 Lubrication Diagram Front View...
Page 460: ...6A4 6 4 8 LITER L6 C 1 107 112 fK 108 3 109 165 129 B 05056 Figure 5 Block and Components...
Page 490: ...Ml...
Page 493: ...V8 ENGINE 6A5 3 Figure 1 Lubrication Diagram 5 0L and 5 7L Engines...
Page 494: ...6A5 4 V8 ENGINE Figure 2 Lubrication Diagram 5 0L and 5 7L Engines...
Page 530: ...6A5 40 V8 ENGINE Figure 81 Exhaust Manifold 7 4L Engines Figure 82 Water Pumps and Components...
Page 571: ...6 2 LITER DIESEL 6A7 35 Figure 58 Vacuum Pump Installed...
Page 576: ......
Page 582: ...6C1 6 MODEL 1MEF CARBURETOR Figure 9 Monojet Model 1MEF...
Page 604: ...6C2 6 MODEL M4MEF CARBURETOR Figure 9 Model M4MEF...
Page 640: ...6C4 8 MODEL 700 THROTTLE BODY...
Page 652: ...nmm...
Page 672: ......
Page 693: ...DISTRIBUTORS 6D5 13 Figure 27 Testing the Pickup Coil Figure 28 Testing the Ignition Coil...
Page 696: ......
Page 698: ...7A1 2 700 R4 AUTOMATIC TRANSMISSION Figure 1 Case and External Parts J H 0 0 5 3 7 0 0 R 4 R 2...
Page 745: ...700 R4 AUTOMATIC TRANSMISSION 7A1 49...
Page 762: ...7A2 2 400 475 AUTOMATIC TRANSMISSION Figure 1 Case and External Parts H H 0021 400 R 3...
Page 773: ...400 475 AUTOMATIC TRANSMISSION 7A2 13 Figure 29 Internal Parts H H 0 0 4 3 4 0 0 R 2...
Page 797: ...400 475 AUTOMATIC TRANSMISSION 7A2 37 Figure 93 Control Valve Assem bly...
Page 803: ...400 475 AUTOMATIC TRANSMISSION 7A2 43 Figure 104 Bushing Replacement Procedure...
Page 808: ...J c I i sal...
Page 838: ......
Page 840: ......
Page 842: ......
Page 850: ...7B1 12 HM 290 MANUAL TRANSMISSION J i t i a x V L...
Page 856: ...7B1 18 HM 290 MANUAL TRANSMISSION...
Page 892: ...7B1 54 HM 290 MANUAL TRANSMISSION Figure 93 Special Tools...
Page 897: ...HM 117 TRANSMISSION 7B2 5...
Page 901: ...HM 117 TRANSMISSION 7B2 9 B 05180 Figure 17 Installing the 1st and 2nd Synchronizer...
Page 912: ...20 HM...
Page 924: ...7B3 12 NEW PROCESS TRANSMISSION SPECIAL TOOLS...
Page 927: ...BORG WARNER TRANSMISSIONS 7B4 3 Figure 2 77 mm Transmission and Components...
Page 940: ...i ii iii m i in m i...
Page 944: ...7D1 4 TRANSFER CASE FO 5688 Figure 3 NP205 Transfer Case...
Page 952: ...7D1 12 TRANSFER CASE...
Page 963: ...NEW PROCESS 241 TRANSFER CASE 7D2 11 Figure 17 Oil Pump Pickup Screen Doweled Case Holes...
Page 964: ...7D2 12 NEW PROCESS 241 TRANSFER CASE Figure 18 NP 241 Transfer Case Cut Away...
Page 978: ......
Page 981: ...BORG WARNER 1370 TRANSFER CASE 7D4 3 J...
Page 992: ...7D4 14 BORG WARNER 1370 TRANSFER CASE Figure 26 Installing the Rear Output Yoke...
Page 993: ...BORG WARNER 1370 TRANSFER CASE 7D4 15 Figure 27 BW 1370 Transfer Case...
Page 997: ......
Page 998: ...X 8937...