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1、26-1 GROUP 26 FRONT AXLE CONTENTS GENERAL DESCRIPTION. . . . . . . . .26-2 FRONT AXLE DIAGNOSIS . . . . . . . .26-2 INTRODUCTION TO FRONT AXLE DIAGNOSIS . . . . . . . . . . . . . . . . . . . . . . . . 26-2 FRONT AXLE DIAGNOSTIC TROUBLESHOOTING STRATEGY . . . . . . 26-2 SYMPTOM CHART. . . . . . . . .
2、 . . . . . . . . . . 26-2 SYMPTOM PROCEDURES . . . . . . . . . . . . 26-3 SPECIAL TOOLS. . . . . . . . . . . . . . . .26-9 ON-VEHICLE SERVICE. . . . . . . . . . .26-14 WHEEL BEARING PLAY CHECK . . . . . . . 26-14 FRONT AXLE TOTAL BACKLASH CHECK26-15 FRONT AXLE GEAR OIL LEVEL CHECK . 26-15 GEAR OIL R
3、EPLACEMENT. . . . . . . . . . . . 26-16 DIFFERENTIAL CARRIER OIL SEAL REPLACEMENT. . . . . . . . . . . . . . . . . . . . . 26-16 SOLENOID VALVE OPERATION CHECK. 26-17 HUB AND KNUCKLE ASSEMBLY . .26-19 REMOVAL AND INSTALLATION . . . . . . . . 26-19 INSPECTION . . . . . . . . . . . . . . . . . . . . .
4、 . . 26-22 DISASSEMBLY AND ASSEMBLY . . . . . . . 26-23 DRIVESHAFT ASSEMBLY . . . . . . . .26-24 REMOVAL AND INSTALLATION . . . . . . . . 26-24 DISASSEMBLY AND ASSEMBLY . . . . . . . 26-26 INSPECTION . . . . . . . . . . . . . . . . . . . . . . . 26-28 UJ BOOT (RESIN BOOT) REPLACEMENT26-28 INNER SHAF
5、T ASSEMBLY . . . . . . . .26-31 REMOVAL AND INSTALLATION . . . . . . . . 26-31 DISASSEMBLY AND ASSEMBLY . . . . . . . 26-33 DIFFERENTIAL CARRIER AND FREE WHEELING CLUTCH . . . . . . . . . . . . .26-36 REMOVAL AND INSTALLATION . . . . . . . . 26-36 DIFFERENTIAL CARRIER AND FREE WHEELING CLUTCH INSPEC
6、TION. . . . . . 26-38 INSPECTION. . . . . . . . . . . . . . . . . . . . . . . . 26-38 FREE WHEELING CLUTCH DISASSEMBLY AND ASSEMBLY. . . . . . . . . . . . . . . . . . . . . 26-39 DIFFERENTIAL CARRIER DISASSEMBLY 26-43 ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . 26-50 SOLENOID VALVE AN
7、D VACUUM HOSE . . . . . . . . . . . . . . . . . . . . . . . . .26-60 REMOVAL AND INSTALLATION . . . . . . . . 26-60 FRONT DIFFERENTIAL MOUNT. . . .26-62 REMOVAL AND INSTALLATION . . . . . . . . 26-62 DIFFERENTIAL MOUNTING INSULATOR REPLACEMENT . . . . . . . . . . . . . . . . . . . . . 26-63 SPECIFIC
8、ATIONS . . . . . . . . . . . . . . .26-65 FASTENER TIGHTENING SPECIFICATIONS26-65 GENERAL SPECIFICATIONS . . . . . . . . . . 26-66 SERVICE SPECIFICATIONS . . . . . . . . . . . 26-67 LUBRICANTS . . . . . . . . . . . . . . . . . . . . . . . 26-67 SEALANTS AND ADHESIVES . . . . . . . . . . 26-67 GENERA
9、L DESCRIPTION TSB Revision FRONT AXLE 26-2 GENERAL DESCRIPTION M1261000100400 The front axle consists of the front hubs, knuckles, drive shaft, wheel bearings, ball joints, front differen- tial, and free wheeling clutch. The features are: The structural method of press fitting unit bearing into fron
10、t hub is applied. The wheel bearing uses a taper roller unit bear- ing. A rotor for detecting the wheel speed is press-fitted to the UJ outer wheel. NOTE: DOJ: Double Offset Joint. UJ: Under cut Joint. Drive shafts incorporate UJ-DOJ-type constant velocity ball joint has high power transmission effi
11、ciency and reduces vibration and noise. A vacuum-type free wheeling clutch has been adopted in the freewheel mechanism. Its solenoid valve and actuator Switch powertrain between RWD and 4WD. The differential support method is a four-point elastic support method which reduce vibration and noise. FRON
12、T AXLE DIAGNOSIS INTRODUCTION TO FRONT AXLE DIAGNOSIS M1261005500210 The 4WD vehicle incorporates a free wheeling clutch as the free-wheeling mechanism. The free wheeling clutch is configured of the mainshaft, shift fork and clutch gears, etc., and is electrically controlled. If the clutch does not
13、lock or locks but does not become free, there may be electrical trouble or the component may be faulty. Noise from the driveshaft, inner shaft or differential can be caused by a compo- nent defect. FRONT AXLE DIAGNOSTIC TROUBLESHOOTING STRATEGY M1261005600110 Use these steps to plan your diagnostic
14、strategy. If you follow them carefully, you will be sure that you have exhausted most of the possible ways to find a front axle fault. 1. Gather information from the customer. 2. Verify that the condition described by the customer exists. 3. Find the malfunction by following the Symptom Chart. 4. Ve
15、rify malfunction is eliminated. SYMPTOM CHART M1261005700270 SYMPTOMSINSPECTION PROCEDURE REFERENCE PAGE Free wheeling Clutch Does not lock1 P.26-3 Locks but does not become free2 P.26-3 Driveshaft, inner shaft Noise during wheel rotation3 P.26-4 Noise due to excessive wheel play in turning directio
16、n 4 P.26-4 DifferentialConstant noise5 P.26-4 Gear noise while driving6 P.26-6 Gear noise while coasting7 P.26-7 Bearing noise while driving or coasting8 P.26-7 Noise while turning9 P.26-7 Heat10 P.26-8 Oil leakage11 P.26-8 FRONT AXLE DIAGNOSIS TSB Revision FRONT AXLE 26-3 SYMPTOM PROCEDURES INSPECTION PROCEDURE 1:Does not Lock DIAGNOSIS STEP 1. Check for looseness in the actuator assembly installation bolt. Q: Is the actuator assembly installation bolt loosened? YES : Tighten to
