Dana Corporation Spicer Heavy Axle & Brake Division P.O. Box 4097 Kalamazoo, Michigan 49003
Dana Spicer Service Manual
The Roadranger System is an unbeatable combination of the best products from Eaton and Dana, partnering to provide you the most advanced, most trouble-free drivetrain in the industry. And it's backed by the Roadrangers -- the most experienced, most expert, most accessible drivetrain consultants in the business. For spec'ing or service assistance,call 1-800-826-HELP (4357), 24 hours a day, 7 days a week, (Mexico: 8-332-1515) for more time on the road. Or visit the Roadranger Website, www.roadranger.com.
Single Speed Axle AXSM-0053 70HD*276*80*286 April 2001

National Institute for

AXSM-05/01 KPC Printed in U.S.A.
Copyright Eaton Corporation, 2001 All rights reserved.
For the most current information visit the Roadranger Website at www.roadranger.com
INDEX SECTION 1 GENERAL INFORMATION
PAGE Important Safety Notice. 1-1 Safety Precautions. 1-2 Axle Identification. 1-3 Servicing Components Not Covered In This Manual. 1-3 Vehicle Storage or Prolonged Inoperation. 1-3 Exploded View of Axle Assembly. 1-4 Parts Description. 1-4

SECTION 2 SERVICE TOOLS

Procurement. 2-1 Service Tool Part Numbers and Description. 2-1
SECTION 3 CARRIER SECTION - SERVICE PROCEDURES
Disassembly. 3-1 Ring Gear Removal. 3-2 Servicing Standard Differential Case Assembly. 3-2 Case Disassembly. 3-2 Case Reassembly. 3-3 Drive Pinion Removal. 3-4 Ring Gear & Pinion Gear Assembly (Theory). 3-5 Establishing Pinion Gear Depth Using Service Tool Gages. 3-6 Assembly of Differential. 3-1 Worksheet for Calculating Ring Gear Backlash & Differential Bearing Preload Shims. 3-13 Applying RTV Silicone Gasket Sealer to Cover Plate. 3-15

SECTION 4 SPECIFICATIONS

Differential Lubrication. 4-l Axle Lubricant Change Schedule. 4-1
Wheel Bearing Lubrication. 4-1 Submersion or Deep Water Fording. 4-1 RTV Silicone Rubber Sealer Specification. 4-2 Fastener Strength Identification. 4-2 Wrench Tightening Torque Specifications. 4-3 Pinion Bearing and Differential Bearing Preload Specification. 4-3 Backlash Specification-Drive Gear to Drive Pinion. 4-3 Drive Pinion Gear Depth Specification. 4-3 Wheel Bearing Specification. 4-3

SECTION 1

GENERAL INFORMATION IMPORTANT SAFETY NOTICE
Should an axle assembly require component parts replacement, it is recommended that Original Equipment replacement parts be used. They may be obtained through your local service dealer or other original equipment manufacturer parts supplier. CAUTION: THE USE OF NON-ORIGINAL EQUIPMENT REPLACEMENT PARTS IS NOT RECOMMENDED AS THEIR USE MAY CAUSE UNIT FAILURE AND/ OR AFFECT VEHICLE SAFETY. Proper service and repair is important to the safe, reliable operation of all motor vehicles or driving axles whether they be front or rear. The service procedures recommended and described in this service manual are effective methods for performing service operations. Some of these service operations require the use of tools specially designed for the purpose. The special tool should be used when and as recommended. CAUTION: EXTREME CARE SHOULD BE EXERCISED WHEN WORKING ON COMPO- NENTS UTILIZING SNAP RINGS OR SPRING LOADED RETENTION DEVICES. FOR PERSONAL SAFETY, IT IS RECOMMENDED THAT INDUSTRIAL STRENGTH SAFETY GOGGLES OR GLASSES BE WORN WHENEVER REPAIR WORK IS BEING DONE ON ANY VEHICLE OR VEHICLE COMPONENTS. It is impossible to know, evaluate and advise the service trade of all conceivable ways in which service might be done or of the possible hazardous consequences of each way. Accordingly, anyone who uses a service procedure or tool which is not recommended must first satisfy himself thoroughly that neither his safety or vehicle safety will be jeopardized by the service methods he selects.

WARNING Some vehicle manufacturers may require the assembly of brake components on Dana axles that utilize materials containing asbestos fibers. BREATHING ASBESTOS DUST MAY BE HAZARDOUS TO YOUR HEALTH AND MAY CAUSE SERIOUS RESPIRATORY OR OTHER BODILY HARM. Follow O.S.H.A. standards for proper protective devices to be used when working with asbestos materials. SILICONE RUBBER SEALANT (RTV) AND LUBRICATING GREASE AND OILS Silicone rubber sealant is used as a gasket material on Dana axles, as well as various lubricants for lubricating purposes. Before using any of these materials, one should become familiar with and follow all safety precautions as recommended by the product manufacturer/supplier. All personnel involved with these materials should follow good industrial hygiene practices (e.g. before eating, hands and face should be thoroughly washed. Eating, drinking and smoking should be prohibited in areas where there is potential for significant exposure to these materials). When discarding any of the materials, observe all local, state, and federal laws and regulations for proper disposal procedures.

Safety Precautions

This symbol warns of possible personal injury.
A serious or fatal injury can occur. if you lack proper training if you fail to follow proper procedures if you do not use proper tools and safety equipment if you assemble components improperly if you use incompatible components if you use worn-out or damaged components if you use components in a non-approved application SAFETY GLASSES SHOULD BE WORN AT ALL TIMES WHEN WORKING ON VEHICLES OR VEHICLE COMPONENTS.

AXLE IDENTIFICATION

Figure 1-1 Spicer axles are identified with a manufacturing date and complete part numbers stamped on the righthand tube. The part number may also appear on a metal tag attached to the cover plate by the cover screws, depending upon the requirements of the vehicle manufacturer. The part number, consisting of six digits reading from left to right, is the basic number for identifying the particular axle assembly. The seventh digit following the dash will identify ratio, differential, and end yoke options used in the assembly. The next group of numbers is the manufacturing date of the axle and is interpreted as follows. The first number is the month, the second number is the day of the month, the third number is the year, the fourth is the line that built the axle, and the letter is the shift.
It is recommended that when referring to the axle, the complete part number and build date be obtained. To do this, it may be necessary to wipe or scrape off dirt, etc., from the axle housing. If the axle is unique on design such that the unit cannot be identified in the standard manner as described above, refer to the vehicle manufacturers service and/or parts manual for proper identification.
SERVICING COMPONENTS NOT COVERED IN THIS MANUAL
Service procedures for some components may not be covered in this manual because they are unique to the vehicle application. Refer to the vehicle manufacturers service manual for servicing those components. (e.g. brakes, hubs, rotors, and wheel end components).

VEHICLE STORAGE OR PROLONGED INOPERATION
If the vehicle has not been operated on a regular daily basis, it is recommended that the vehicle be operated at least once every two weeks. The vehicle should be moved far enough to cause the drivetrain components to make several complete revolutions. This procedure will help assure that all internal components receive adequate amount of lubrication to help reduce component deterioration caused by an undesirable environment (e.g. high humidity).
EXPLODED VIEW OF AXLE ASSEMBLY
Figure 1-2 The model 80 single-speed axle assembly is an integral-type housing. Shown in figure 1-2 is a Model 80 full-float design. Item Part Description Ring Gear and Drive Pinion Assembly Inner Pinion Bearing Cone Inner Pinion Bearing Cup Pinion Position Shims Pinion Bearing Preload Shims Outer Pinion Bearing Cup Outer Pinion Bearing Cone Thrust Washer Pinion Seal End Yoke and Flinger Assembly Washer Nut Shipping Plug (Shipping purposes only Removed by vehicle manufacturer) Side Gear Thrust Washer Pinion Mate Gear Thrust Washer Differential Side Gear Differential Pinion Mate Gear Differential Pinion Mate Shaft Differential Outboard Spacer Differential Bearing Cup Item Part Description Differential Bearing Cone Differential Bearing Preload and Backlash Shims 23 Ring Gear Screw 24 Differential Case 25 Roll Pin (Pinion Mate Shaft) 26 RTV Sealant *27 Identification Tag 28 Pill Plug 29 Cover Plate 30 Cover Screw 31 Brake Line Clip 32 Differential Bearing Cap Screw 33 Housing **34 Differential Bearing Cap 35 Gasket-Axle Shaft Flange 36 Axle Shaft 37 Screw - Axle Shaft Flange *Specified by vehicle manufacturer. **Differential bearing caps are part of the housing and cannot be serviced separately.

SECTION 2

SERVICE TOOLS

PROCUREMENT

Throughout the manual reference is made to certain tool numbers whenever special tools are required. These tool numbers are numbers of Miller Special Tools, Park Lane. Garden City, MI 48135. They are used herein for customer convenience only. Dana makes no warranty or representation to these tools. Miller Tool Number Description

DD-914-8 DD-914-99 DD-914-95 D-115 C-4308 C-4204 D-4308 D-389 DD-914-42 DD-914-42 C-3339 W-129-B 6776 DD-914-7 C-4171 C-1490 D-D-191 DD-914 DD-914-P D115-2, D-131
2 Jaw Puller Adapter Ring Adapters Adapters Arbor* Bearing Cup Installer Bearing Cup Installer* Bearing Cup Installer Bearing Installer Button Button Dial Indicator Set Differential Spreader Dummy Differential Bearing Set* Extension Handle Installer Long Handle break-over bar (wrench) Pinion Bearing Cup Remover Pinion Height Set* Pinion Yoke Installer Press Press Scooter Gage** Slide Hammer Torque Multiplier*** Torque Wrench Yoke Holder
* Gage set for setting differential bearing preload , gear backlash, and pinion position. ** Consist of D-106-5 dial indicator and D-115-2 Scooter Block. *** The Torque Multiplier increases torque (4 to 1) by means of gear ratio: 1/2" drive (female), 1/4" drive (male).

SECTION 3

CARRIER SECTION

DISASSEMBLY NOTE

The photos or pictures contained herein are for illustrative and instructional purposes only. The appearance of your axle assembly and/or components may vary from that shown. However, the service procedures described will apply. If it becomes necessary to disassemble any parts inside the carrier, it is suggested that the entire axle be removed from the vehicle and held tight in a stand or rack. All dimensions are in inches unless otherwise stated. Dimensions in parentheses followed by mm are in millimeters. WARNING: When removing axle assembly, make sure vehicle is properly supported. Improperly supported vehicle can cause serious injury or death. Follow vehicle manufacturers recommendations for proper axle assembly removal procedures.

Figure 3-2

Step (3) Mount spreader to housing. DO NOT SPREAD CARRIER OVER ,015 (.38 mm). Use dial indicator as shown.
TOOL: W- 129-B Differential Spreader C-3339 Dial Indicator Set
Step (1) Remove cover plate from housing and drain lubricant.
NOTE Before removing differential case assembly, make sure the axle shafts are pulled out far enough for clearance to allow removal.

Figure 3-3

Step (4) Pry differential case from carrier with two pry bars. After differential case has been removed, remove spreader. Use caution to avoid damage to components. Tag bearing cups indicating from which side they were removed from. See note below regarding the use of bearings.

Figure 3-1

Step (2) Remove bearing caps. Note mating letters stamped on caps and carrier. This is important at time of assembly as they are to be assembled exactly as removed. Letters or numbers are in vertical and horizontal position.

NOTE It is recommended that whenever bearings are removed, they are to be replaced with new ones, regardless of mileage. 3-1

RING GEAR REMOVAL

Figure 3-4
Step (5) Note the differential bearing outboard spacers located on each side of the differential bearing bore. Remove and tag which side they were removed from. Ring gear side or opposite side. They will be reused during assembly, unless damaged or worn.
NOTE Check outboard spacers for damage. (e.g. caused by worn bearings). If damaged, they should be replaced with new ones at time of reassembly.

Figure 3-6

Step (7) Place differential case in vise or suitable holding fixture. Remove ring gear screws. Leave 4 screws loosely assembled 90 degrees apart. Place assembly on a solid bench. Tap screws alternately and evenly to free ring gear from differential case. Remove screws and ring gear. Discard ring gear screws. Ring gear screws are to be replaced with new ones at time of reassembly.
SERVICING STANDARD DIFFERENTIAL CASE ASSEMBLY
The differential assembly may be serviced at this time, if required. If differential case, side gears and pinion mate gears are useable and do not require servicing, proceed to DRIVE PINION REMOVAL.

CASE DISASSEMBLY

Figure 3-5
Step (6) Remove differential bearing cones with a puller as shown. Tag cones indicating from which side they were removed from.
DD-914 Press DD-914-99 Adapters DD-914-8 Adapter Ring DD-914-7 Extension DD-914-42 Button
WARNING: When pulling bearings, do not allow differential assembly to fall. It can strike legs or feet and may cause serious injury. 3-2

Figure 3-7

Step (8) Remove roll pin with a small drift.

Figure 3-8

Step (9) Remove differential pinion mate shaft with drift.

Figure 3-10

Step (13) Assemble both side gears into case. Hold top side gear up with fingers. Assemble one pinion mate gear. Rotate gears until pinion mate gear is directly in the center of the small opening of the case. Line up the other pinion mate gear with the gear which has just been assembled. Rotate gears until the holes of pinion mate gears are in direct line with the holes of the differential case. Step (14) Aft er making sure the gears are in alignment, apply a small amount of grease to the new spherical washers. Assemble washers between the gears and case. Also line up the holes of the washers with those of the gears and case. Assemble pinion mate cross shaft, make sure lock pin hole of the shaft is in verticle position and lined up with the lock pin hole of the case.

Figure 3-9

Step (10) Rotate gears until the pinion mate (small gears) enter the large opening of the case. Remove pinion mate gears and spherical washers. After removal of the pinion mate gears, the side gear and thrust washers can be easily removed. Step (11) Inspect and replace components as required.
NOTE Always replace gears as a complete set. Do not mix new gears with old gears, as this may cause uneven wear and short gear life.

Figure 3-11

Step (15) Assemble new roll pin. Peen metal of case over pin to lock in place.

CASE REASSEMBLY

Step (12) Apply a small amount of grease on both side gear hubs. Assemble new thrust washers onto side gears.

DRIVE PINION REMOVAL

Step (16) Secure end yoke or flange with holding wrench, and remove pinion nut and washer. NOTE: PINION NUT HAS 500 LBS. FT. (677.9 Nom) MAX. OF TORQUE FOR RETENTION.
WARNING: Gear teeth may have sharp edges. When handling gears, use care to avoid personal injury.
Yoke Holder Torque Multiplier Long Handle break-over bar (wrench)
NOTE On the spline end of the pinion, there are bearing preload shims. These shims may stick to the pinion or bearing or even fall out. These shims are to be collected and kept together since they will be used later in assembly. Try not to mutilate shims. If shims are mutilated, replace with new ones.

Figure 3-12

Step (17) Remove end yoke or flange with tools as shown. If end yoke or flange shows wear in the area of the seal contact surface, it should be replaced.

2 Jaw Puller

Figure 3-14
Step (19) Pull out pinion seal with puller as shown. Discard seal. REPLACE WITH NEW ONE AT TIME OF ASSEMBLY. Remove bearing cone and outer thrust washer.

D- 131 Slide Hammer

Figure 3-13
Step (18) Remove pinion by tapping with a rawhide or plastic hammer. Catch the pinion with your hand to prevent it from falling and being damaged.

Figure 3-15

Step (20) Turn nose of carrier down. Remove outer pinion Step (22) Remove pinion bearing with tools as shown. bearing cup. Locate driver on back edge of cup; drive cup out of carrier. CAUTION: DO NOT NICK CARRIER BORE.

Figure 3-1 7

D-159 Pinion Bearing Cup Remover C-4171 Handle
DD-914-P Press DD-914-8 Adapter Ring DD-914-95 Adapters
WARNING: Do not allow gear to fall. It can strike legs or feet and may cause serious injury. Gear teeth may have sharp edges. When handling, use care to avoid cutting hands.
RING & PINION GEAR ASSEMBLY THEORY

Figure 3-16

Step (21) Remove the inner bearing cup with tools as shown.
C-4307 Bearing Cup Remover C-4171 Handle Figure 3-18 (View of ring 81 pinion set)
Step (23) Ring gears and pinions are supplied in matched sets only. Matching numbers on both the pinion and ring gear are etched for verification. If a new gear set is being used, verify the numbers of each pinion and ring gear before proceeding with assembly. The nominal distance from the centerline of the ring gear to the button end of the pinion for the Model 80 axle is 3.500 (88.9 mm).
NOTE: Shims are located between the bearing cup and carrier bore and may also include an oil baffle, depending upon the application. If shims and baffle are bent or nicked, they should be replaced at time of assembly.
On the button end of each pinion, there is etched a plus (+) number, a minus (-) number, or a zero (0) which indicates the best running position for each particular gear set. This dimension is controlled by the shimming behind the inner pinion bearing cup. For example: If a pinion is etched a plus +3 (m+8), this pinion would require.003 (.08 mm) less shims than a pinion etched 0. This means by removing shims, the mounting distance of the pinion is increased to 3.503 (88.98 mm), which is just what a +3 (m+8) indicates. Or if a pinion is etched -3 (m-8), we would want to add.003" (.08 mm) more shims than would be required if the pinion were etched 0. By adding.003 (08 mm) shims, the mounting distance of the pinion was decreased to 3.497 inches (88.82 mm) which is just what a -3 (m-8) indicates. If the old ring and pinion set is to be reused, measure the old shim pack and build a new shim pack to this same dimension. If a baffle is used in the axle assembly, it is considered as part of the shim pack. To change the pinion adjustments, use different combination of the pinion shims which come in different thicknesses.

Old Pinion Marking

New Pinion Marking
-10 +.20 +.18 +.15 +.13 +.10 +.08 +.05 +.-8 +.18 +.15 +.13 +.10 +.08 +.05 +.-.03 -5 +.15 +.13 +.10 +.08 +.05 +.-.03 -.05 -3 +.13 +.10 +.08 +.05 +.-.03 -.05 -.+.10 +.08 +.05 +.-.03 -.05 -.08 -.10 +3 +.08 +.05 +.-.03 -.05 -.08 -.10 -.13 +5 +.05 +.-.03 -.05 -.08 -.10 -.13 -.15 +8 +.-.03 -.05 -.08 -.10 -.13 -.15 -.18 +-.03 -.05 -.08 -.10 -.13 -.15 -.18 -.20

+10 +8 +5 +-3 -5 -5 -10

Figure 3-20 (Pinion Setting Chart - Metric) If metric, pinion will be etched (m+ some number). Example (m+5). Use these charts as a guideline to set pinion.
ESTABLISHING PINION GEAR DEPTH USING SERVICE TOOL GAGES.
NOTE If baffle or slinger is bent or mutilated, it should be replaced.
Figure 3-21 View of master pinion bearing, pinion height block, scooter gage, cross arbor, arbor discs and master differential bearings.

NOTE Make sure that all carrier bores are free from all nicks, dirt or any other contamination.
Measure each shim separately with a micrometer and add together to get total shim pack thickness from the original build-up. If a new gear set is being used, notice the (+) or (-) etching on both the old and new pinion and adjust the thickness of the new shim pack to compensate for the differences of these two figures. For example: If the old pinion reads +2 (m+5) and the new pinion is -2 (m-5), add.004" (. 10 mm) shims to the original shim pack.
-4 +0.008 +0.007 +0.006 +0.005 +0.004 +0.003 +0.002 +0.-3 +0.007 +0.006 +0.005 +0.004 +0.003 +0.002 +0.-.0.001 -2 +0.006 +0.005 +0.004 +0.003 +0.002 +0.-.0.001 -0.002 -1 +0.005 +0.004 +0.003 +0.002 +0.-.0.001 -0.002 -0.+0.004 +0.003 +0.002 +0.-.0.001 -0.002 -0.003 -0.004 +1 +0.003 +0.002 +0.-.0.001 -0.002 -0.003 -0.004 -0.005 +2 +0.002 +0.-.0.001 -0.002 -0.003 -0.004 -0.005 -0.006 +3 +0.-.0.001 -0.002 -0.003 -0.004 -0.005 -0.006 -0.007 +-.0.001 -0.002 -0.003 -0.004 -0.005 -0.006 -0.007 -0.008

+4 +3 +2 +-1 -2 -3 -4

Figure 3-19 (Pinion Setting Chart - English U.S. Standard)
Figure 3-22 Step (24) Assemble the outer pinion bearing cup into carrier as shown. Make sure cup is seated. TOOL: C-4171 Handle C-4308 Bearing Cup Installer
Figure 3-24 Step (26) Assemble pinion with master bearing into housing. Assemble outer pinion bearing cone, end yoke, washer, and nut. Torque nut until pinion gear and master bearing is snug (seated) in housing. The pinion gear should not have any end play. NOTE: Do not try to rotate pinion using master bearing.
Figure 3-23 Step (25) Assemble master pinion bearing on pinion. TOOL: C-4204 Bearing Cup lnstaller
Figure 3-25 Step (27) Place arbor discs (large diameter) and arbor into cross bores of carrier as shown. TOOL: 6776 Dummy Differential Bearing Set D-115 Arbor

Figure 3-26

Step (28) Place pinion height block on top of the button end of the pinion gear and against arbor as shown.
over top of arbor, it will travel in a clockwise direction. When indicator is on center of arbor (on top) it will stop traveling in a clockwise direction. If indicator starts to travel in a counter-clockwise direction, this means you have passed the center (top) of the arbor. Record only the reading when the indicator is at the highest point. This reading indicates the amount of shims necessary to obtain the shim pack plus (+) or minus (-) the etching on the button end of the pinion. If the etching is zero (0), the shim pack will remain unchanged. For example: If the pinion is etched +3 (m+8), this pinion would require.003" (.08 mm) less shims than a pinion etched zero (0). If the pinion is etched -3 (m-8), this would require. 003" (.08 mm) more shims than a pinion etched zero (0).

Figure 3-36

Step (38) Assemble pinion, end yoke, washer, and new pinion nut. Torque nut to specification.
TOOL: 6719 Yoke Holder Torque Wrench
NOTE: Torque wrench must be capable of 500 lbs. ft. (677.9 Nm) torque.

Figure 3-37

Step (39) Using an in. Lbs. torque wrench as shown, rotate pinion. Torque to rotate pinion should be within specification. To increase preload, remove shims, to decrease preload add shims.

Figure 3-35

Figure 3-38
The illustration in figure 338 shows the arrow in the pinion pointing in two directions. The direction pointing towards the end yoke indicates that by removing pinion position shims, the distance from the centerline of the axle to the pinion button is increased giving a plus reading. The preload shim pack does not effect the pinion depth setting. Arrows on the ring gear illustrate the method to increase or decrease backlash and differential bearing preload.

Figure 3-40

Step (41) Assemble the differential bearing outboard spacers into the carrier housing, as removed in step 5, figure 34. Assemble differential case into carrier (less ring gear). Mount dial indicator with a magnetic base as shown. Locate tip of indicator on flat surface of case. Force differential assembly as far as possible in the direction towards the indicator. With force still applied, set indicator at zero (0).
TOOL: C-3339 Dial Indicator Set

ASSEMBLY OF DIFFERENTIAL

NOTE Dial indicator should have a minimum travel capability of.200 (5.08 mm). Force the differential assembly as far as it will go in the opposite direction. Repeat these steps until you have obtained the same reading. Record the reading of the indicator on the worksheet, page 313. This reading will be measurement A. After making sure the readings are correct, remove indicator and differential assembly from housing. Remove master bearings from hubs and set aside.

Figure 3-39

Step (40) Assemble master differential bearings onto case. Remove all nicks, burrs, dirt etc., from hubs to allow master bearings to rotate freely.
TOOL: 6776 Dummy Differential Bearing Set

Figure 3-41

Step (42) Place case assembly in a vise. Be sure flange
face of the case is free of nicks or burrs. Assemble ring gear to case. Line up holes of the ring gear with those of the case. Use new ring gear screws. Draw up screws alternately and evenly. Torque ring gear screws to specification.

Figure 3-44

Step (45) Assemble the required amount of shims onto hub (ring gear side) and opposite side as determined using the worksheet. Place bearing cone on hub of case. Use bearing installer to seat bearing cone as shown.

TOOL: Figure 3-42

Step (43) Assemble master differential bearings onto case hubs. Place differential assembly into housing. Set up dial indicator as shown. Locate tip of indicator on flat surface of one of the ring gear screws. Force the differential case assembly (ring gear) away from the pinion gear. With force still applied to the differential case, set indicator at zero 0. TOOL: C-3339 Dial Indicator Set
C- 1490 Installer C-4171 Handle DD-914-42 Button
NOTE Button is used to raise case from bench to protect bearing cone cage from being damaged when installing opposite bearing cone.

Figure 3-43

Step (44) Force the differential case assembly and ring Step (46) Install spreader and indicator as shown. DO NOT gear into mesh with the pinion gear. Rock ring gear to allow SPREAD CARRIER OVER.015 (.38 mm). Remove indicator. the teeth of the gear to mesh. Repeat until the same reading is obtained each time. Record this reading on the TOOL: W- 129 B Differential Spreader worksheet, page 313. This reading will be measurement C-3339 Dial Indicator Set B. Remove indicator and differential case assembly from the carrier. Remove master differential bearings from the differential case. Refer to the worksheet for calculating ring gear backlash and differential bearing preload shims, page 3-13. 3-12

Figure 3-45

WORKSHEET FOR CALCULATING RING GEAR BACKLASH AND DIFFERENTIAL BEARING PRELOAD SHIMS
(1) Total amount of space measured without ring gear as shown in step 41, figure 3-40 Total amount of space measured with gear set assembled in carrier as shown in step 44, figure 3-43 Measurement A minus Measurement B equals calculated Measurement A
Measurement B Measurement C
After the measurements and calculations have been made, assemble the shim packs using the figures determined in A, B, & C, and adjusting the pack as described below.

RING GEAR SIDE:

Assemble shim pack to measurement B.
OPPOSITE SIDE OF RING GEAR:
Assemble shim pack to measurement C. Add.010 (.25 mm) for differential bearing preload and backlash.

EXAMPLE

(1) Total amount of space measured without ring gear as shown in step 41, figure 3-40 Total amount of space measured with gear set assembled in carrier as shown in step 44, figure 3-43 Measurement A minus Measurement B equals calculated Measurement A.105" (2-67 mm)

Measurement B.065" (1.65 mm) Measurement C.040" (1.02 mm)
Assemble shim pack to measurement B, In this example it is.065" (1.65 mm).
OPPOSITE SIDE OF RING GEAR
Assemble shim pack to measurement C. Add.010 (.25 mm) for differential bearing preload and backlash.040" +.010" =.050", (1.02 mm + 25 mm = 1.27mm).

Figure 3-46

Step (47) Assemble differential bearing cups to differential bearing cones. Install differential assembly into carrier. Use a rawhide or plastic hammer to seat differential assembly into cross bores of carrier. Care should be taken to avoid nicking the teeth of the ring gear and pinion during assembly. Remove spreader.
WARNING: When differential assembly is installed into carrier, use care to avoid pinching hand or fingers between differential bearing cup and carrier housing. Gear teeth may have sharp edges. When handling gear, use care to avoid cutting hands.

Figure 3-48

Step (49) Check ring gear and pinion backlash in three equally spaced points with dial indicator as shown. Backlash should be within specification and cannot vary more than.002 (-05 mm) between points checked. TOOL: C-3339 Dial Indicator Set
High backlash is corrected by moving the ring gear closer to the pinion. Low backlash is corrected by moving the ring gear away from the pinion. These corrections are made by switching shims from one side of the differential case to the other.

Figure 3-49

Step (50) Using an in. lb. torque e wrench as shown, rotate pinion and differential assembly, Torque reading should be within specifi ication. If preload is to high, remove an equal amount of shims from both sides of the differential case hubs. If preload is to low, add an equal amount of shims to both sides of differential case hubs.
NOTE If shims are added to one side only, it will affect backlash reading.

Figure 3-47

Step (48) Install bearing caps. Make sure the letters stamped on the caps correspond with those on the carrier. Torque bearing cap screws to specification. TOOL: Torque Wrench
APPLYING RTV SILICONE GASKET SEALER TO COVER PLATE

Figure 3-50

Step (51) Apply gasket sealer to cover plate and assemble to carrier. Torque screws to specification.

Torque Wrench

The cover face of the carrier and the flat surface of the cover plate must be free of any oil film or foreign material. Sealant material must meet specifications as described in the specification section of this manual. Apply sealer to cover plate surface. Ensure that the sealer bead is laid on the inside of the cover screw holes. The bead is not to pass through the holes or outside of the holes. The bead is to be 1/8" to 1/4" (3.18 - 6.35 mm) high and 1/8" to 1/4" (3.18 - 6.35 mm) wide. Allow one hour cure time before filling carrier with the proper amount of specified lubricant and vehicle operation. Assemble axle shafts and wheel end components. Refer to your vehicle service manual for proper wheel bearing setting specification.

A.P.I. - American Petroleum Institute N.L.G.I. - National Lubricating Grease Institute
RTV SILICONE RUBBER SEALER SPECIFICATION
Sealant material must meet specification of 1A.S.T.M. 1, GE 503, Z1, Z2, 23.
FASTENER STRENGTH IDENTIFICATION
IMPORTANT Whenever fasteners are replaced, it is very important that the fastener be replaced with one of equal or higher grade and quality. Fasteners should be torqued as recommended or specified for the application. WARNING IF FASTENERS OF A LOWER GRADE OR CLASS ARE TORQUED TO THE REQUIREMENTS OF A HIGHER GRADE OR CLASS FASTENER, IT MAY RESULT IN COMPONENT FAILURE. (E.G. GRADE 5 FASTENER TORQUED TO THE REQUIREMENTS OF A GRADE 8 FASTENER.)

GRADE 5

GRADE 7

GRADE 8

Customary (Inch) Bolts - Identification marks correspond to bolt strength - Increasing numbers represent increasing strength.
SPECIAL GRADE (High Strength Applications)
Metric Bolts - Identification class numbers correspond to bolt strength - increasing numbers represent increasing strength.

Figure 4-l

Inch grade fasteners can be identified by the radial lines embossed upon the head of the fastener and will correspond to the fastener strength by two-lines less than actual grade (i.e. grade 8 fastener will display 6 radial lines on the head). Metric fastener strength can be identified with the class identification embossed on the head of each fastener. Increasing numbers represent increasing strength.
A.S.T.M. - American Society for Testing and Material
WRENCH TIGHTENING TORQUE SPECIFICATIONS
Cover Screws. Differential Bearing Cap Screws. Drive Pinion Nut. Fill Plug. Ring Gear Screws. LBS. FT. Nm 47.5 108.5 637.2 33.9 298.3
PINION BEARING AND DIFFERENTIAL BEARING PRELOAD SPECIFICATION
Torque to Rotate Drive Pinion Only (New bearings only). Torque to Rotate Drive Pinion and Differential Case Assembly (Less Axle Shafts) (New bearings only) LBS. FT. 1 20-40 Nm 2.26 - 4.52

SEE NOTE 1

BACKLASH SPECIFICATION
Drive Gear to Drive Pinion. 005 -.008 (.13 -20 mm)
DRIVE PINION GEAR DEPTH SPECIFICATION

Figure 4-2

The pinion setting dimension is measured from the centerline of differential carrier (center line of ring gear) to face of pinion (button), plus or minus the etch on the button of the pinion. This dimension must be held within .002 in (.05 mm). For example: The model 80 pinion setting dimension is 3.500 (88.9 mm). If the pinion etch is a +2, this dimension becomes 3.502 (88.95 mm).
WHEEL BEARING SPECIFICATION
SPECIFIED BY VEHICLE MANUFACTURER. CONTACT YOUR LOCAL VEHICLE SERVICE DEALER OR REFER TO YOUR VEHICLE SERVICE MANUAL FOR OBTAINING THE PROPER WHEEL BEARING SPECIFICATION.

Ring Gear Diameter Ring Gear Bolts 3/8 x 24 RH Cover Bolts Pinion Splines Carrier Breaks: 3.54 / 3.73

7.10 26

DANA 30

Ring and Pinion Sets

Ratio 3.31 R&P 3.54 R&P 3.73 R&P 4.10 R&P 4.27 R&P 4.56 R&P 4.88 R&P 5.38 R&P 3.07 R&P Reverse 3.54 R&P Reverse 3.73 R&P Reverse 4.10 R&P Reverse 4.56 R&P Reverse 4.88 R&P Reverse 3.07 TJ 3.54 TJ 3.73 TJ 4.10 TJ 4.56 TJ 4.88 TJ 3.55 ZJ 3.73 ZJ OEM DAN71350-5X DAN706503-2X DAN706503-3X DAN23721-5X DAN706503-8X DAN706503-6X DAN70289-5X DAN706930-2X DAN706930-8X DAN706930-5X DAN71864-5X DAN706930-6X DAN707344-2X DAN707344-10X DAN707344-11X DAN707344-6X West Coast Gear Sierra Gear SG D30-373 SG D30-411 WCGD30-456 SG D30-456
SG D30-411R SG D30-456R SG D30-488R
DAN707300-4X DAN707300-5X
SG D30-456TJ SG D30-488TJ

Installation Kits

Application Dana 30 Rear Dana 30 Front Dana 30 TJ Dana 30 ZJ 92-96 Basic BK D30R BK D30F BK D30TJ BK D30ZJ Master IK D30R IK D30F IK D30TJ IK D30ZJ Pinion PK D30R PK D30F Mini MK D30R MK D30F MK D30TJ
Positractions & Lockers
Differential 3.54 & Down 3.73 & Up ARB Air Locker ARBRD31 ARBRD30 Detroit Locker DET162S-60A DET162S-60B Lockright PT 2210 PT 2210 Powr Lok DAN706001X CASE + IPK Truetrac TT 912A374 TT 912A314
Cases and Internal Parts Kits
Differential 3.54 & Down Standard 3.73 & Up Standard 3.73 & Up Powr Lok Case DAN706007X DAN706008X DAN706006X Internal Kit DAN706010X DAN706010X DAN706009X