How to measure Wheel Stud Circle Runout

Weber State University (WSU) - Automotive Technology Department - Transmission Lab. The on-car measurement procedure of wheel stud circle runout. Wheel stud circle runout and can cause first-order tire speed-related vibrations. Timeline: 0:00 Introduction 2:08 Hub centered wheels 2:58 Dial indicator setup and mounting 3:48 Starrett 25R Contact Point Kit 4:23 The goal of the measurements 4:40 Finding the high spot of the first wheel stud 5:20 Zeroing the dial indicator on the first wheel stud 6:00 Rotating the axle/hub to the next wheel stud 6:30 Finding the high spot of the second wheel stud (0.003" (0.076mm) difference from the first wheel stud) 6:58 Finding the high spot of the third wheel stud (0.004" (0.1mm) difference from the first wheel stud) 7:58 Finding the high spot of the fourth wheel stud (0.0005" (0.013mm) difference from the first wheel stud) 8:20 always check the stud circle runout next to the flange 8:41 Finding the high spot of the fifth wheel stud (0.001" (0.025mm) difference from the first wheel stud) 8:56 Determining overall wheel stud runout of 0.004" (0.1mm) 9:30 The typical maximum specification for wheel stud runout is 0.010" (2.54mm) 9:52 Match mounting the wheel to the wheel studs 11:36 New parts do not equal good parts (in specification) 12:02 Summary This video helps satisfy the requirements of the following NATEF Tasks: 3.E.E1.1 – Drive Axles - Inspect and replace drive axle wheel studs 3.E.E3.4 – Axle Shafts - Measure drive axle flange runout and shaft end play; determine necessary action - Priority Level 2 3.E.E3.5 – Axle Shafts - Diagnose noise and vibration concerns; determine necessary action - Priority Level 2 http://www.weber.edu/automotive This video was created and edited by Professor John D. Kelly at WSU. For a full biography, see http://www.weber.edu/automotive/J_Kel... Are you trying to diagnose a vibration in your vehicle? See the incredible vibration diagnosis NVH app at    / vibratesoftware   Donate to the Department of Automotive Technology at Weber State University here: http://advancement.weber.edu/Automotive