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z test sample problem with solution

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SECTION 205-00 Driveline System — General Information

GENERAL PROCEDURES Driveshaft Runout and Balancing Special Tool(s) Dial Indicator Gauge with Holding Fixture 100-002 (TOOL-4201-C) or equivalent Mastertech® Series MTS 4000 Driveline Balance and NVH Analyzer (Vetronix) 257-00018 or equivalent Driveshaft Inspection NOTE: Driveline vibration exhibits a higher frequency and lower amplitude than high-speed shake. Driveline vibration is directly related to the speed of the vehicle and is noticed at various speeds. Driveline vibration can be perceived as a tremor in the floorpan or heard as a rumble, hum or boom. NOTE: Refer to Specifications in this section for all runout specifications. 1. NOTE: Do not make any adjustments before carrying out a road test. Do not change the tire pressure or the vehicle load. Carry out a visual inspection of the vehicle. Operate the vehicle and verify the condition by reproducing it during the road test. • 2. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Section 100-02. • 3. The concern should be directly related to vehicle road speed, not affected by acceleration or deceleration or could not be reduced by coasting in NEUTRAL. The driveshaft should be kept at an angle equal to or close to the curb-weighted position. Use a twin-post hoist or a frame hoist with jackstands. Inspect the driveshaft for damage, undercoating or incorrectly seated U-joints. Rotate the driveshaft slowly by hand and feel for binding or end play in the U-joint trunnions. Remove the driveshaft. For additional information, refer to Section 205-01. Inspect the slip yoke splines for any galling, dirt, rust or incorrect lubrication. Clean the driveshaft or install new U-joints as necessary. Install a new driveshaft if damaged. After any corrections or new components are installed, recheck for the vibration at the road test speed.

Drive Line / Universal
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– Drivelines and Universal Joints Universal Joint Maintenance • Most factory-installed universal joints are sealed and don’t require periodic lubrication • After-market replacement joints are equipped with a grease fitting and must be greased periodically Drive Shaft Problem Diagnosis • Road testing – Vehicle should be driven while accelerating and decelerating as well as at various steady speeds – Vibrations caused by worn U-joints usually occur while accelerating Types and Causes of Vibrations • High speed vibrations – Usually caused by driveshaft imbalance • Vibrations during acceleration – Usually caused by worn double Cardan joint ball and socket • Low speed vibrations – Usually caused by improper operating angles Noise Diagnosis • Clunking noise while accelerating from a dead stop – Usually caused by worn or damaged U-joint – Can be caused by problems including excessive clearance between slip joint and extension housing • Squeaking noise – Often caused by worn or poorly lubricated U-joint Reasons for Universal Joint Failure • Lack of lubrication • Pushing another car • Towing a trailer • Changing gears abruptly • Carrying heavy loads Steps in Lubricating U-Joints 1. Wipe off the nozzle of the fitting 2. Attach the hose of the grease gun to the fitting 3. Pump grease slowly into the fitting 4. Stop pumping when grease appears at the bearing cups Inspecting the Drive Shaft • Check for fluid leaks • Check the U-joints for signs of rust or leakage • Check for movement in the joint while trying to turn the yoke and the shaft in opposite directions • Check the drive shaft for dents, missing weights, and undercoating or dirt...

XT100-08am Driveshaft Vibration.pdf - JagRepair.com - Jaguar ...

X-TYPE DATE 05/04 Amended 09/04 XT100-08 TECHNICAL BULLETIN SERVICE Driveshaft Vibration – Diagnostic Method – Repair MODEL 2002-04 MY X-TYPE VIN C00001-E02938 Remove and destroy Bulletin XT100-08, dated 05/04. Replace with this Bulletin. Revisions are marked with a bar and in bold text. Issue: A new procedure has been developed for use after the WDS Vehicle Vibration Analyzer (VVA) has confirmed a vehicle vibration. Action: After a driveshaft vibration has been confirmed using WDS VVA, follow the workshop procedure outlined below. WORKSHOP PROCEDURE Note: There is no Labor Time Allowance to carry out road test diagnosis. Jaguar recommends a claim of 0.50 hrs. as straight time for VVA. Warning: Driveshaft bolts are one-time use only. Use new bolts for the final repair. Existing bolts may be reused throughout the diagnostic procedures. Raise vehicle on twin-post lift. Check for alignment of the green line on the rear differential flange with white paint spot on the rear of the driveshaft. If not aligned continue from step 3; if aligned continue from step 16. Remove the rear driveshaft joint to rear differential flange bolts and links where accessible. Rotate the driveshaft and remove the remaining rear driveshaft joint to rear differential flange securing bolts and links. Displace driveshaft from the rear differential flange. Remove and discard the gasket from the rear differential flange (where installed). Clean the mating faces. Install a new gasket to the rear differential flange, if previously installed. NOTE: THE INFORMATION IN TECHNICAL BULLETINS IS INTENDED FOR USE BY TRAINED, PROFESSIONAL TECHNICIANS WITH THE KNOWLEDGE, TOOLS, AND EQUIPMENT TO DO THE JOB PROPERLY AND SAFELY. IT INFORMS THESE TECHNICIANS OF CONDITIONS THAT MAY OCCUR ON SOME VEHICLES, OR PROVIDES INFORMATION THAT COULD ASSIST IN PROPER VEHICLE SERVICE. THE PROCEDURES SHOULD NOT BE PERFORMED BY “DO-ITYOURSELFERS.” DO NOT ASSUME THAT A CONDITION DESCRIBED AFFECTS YOUR CAR. CONTACT A JAGUAR RETAILER TO DETERMINE WHETHER THE BULLETIN APPLIES TO YOUR VEHICLE. Date of issue 05/04 Amended 09/04

How to Diagnose Vibrations
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Vibration Diagnostics S tart 1 Gather Info When did vibration start? Where is vibration felt? What road conditions? Under load or high torque conditions? During acceleration/deceleration? Speed dependent? RPM dependent? Noise? Suspension modified recently? Lube clean and at proper level? 2 Important: Use factory service manuals and procedures and refer to all applicable safety precautions when servicing vehicles. This document is intended to assist with drivetrain vibration diagnosis. It does not guarantee an immediate solution nor does it guarantee warranty responsibility or reimbursement. Refer to Roadranger.com for Product Warranty Statements, Warranty Manual, and Warranty Guidelines. 6 Vibrations While Stationary Previous work on clutch or engine Y es In the road test in Step 2, the vehicle was run up to the suspected RPM and the transmission shift lever was placed in neutral. No Y es No If clutch work recently done, problem could be related to the clutch. Verify proper clutch was installed. If engine work recently done, problem could be related to the engine. Contact your engine distributor. 4 No Problem is related to the clutch. Road Test Have vehicle driver recreate complaint condition, if possible Leave trailer attached Run up to suspected RPM and put transmission in neutral Simulate Conditions Speed Related? Y es Does ride height meet OEM specs Y es No No Perform visual inspection and use Eaton Driveline Angle Analyzer (DAA). U-joint bearing cups and trunnions Bearing straps Flange yoke / companion flange Yoke-mounted damper Parking brake Center bearing Fasteners Driveshaft for damage / missing weights Driveshaft slip spline (wear / bottoming / inadequate engagement) Cab mounts / air ride system Correct per OEM procedures. Speed RPM Gear Position Coast Under power Loaded / Unloaded Problem Solved No Remove all drive axle shafts and lock in power divider. Run truck in same condition as when complaint occurred. Y es Done! Problem Solved Isolate Suspect Shaft No Y es Problem is related to the wheel end. Take known good wheel assembly and test replacement from wheel to wheel to isolate problem.

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