ASE A4 Suspension and Steering Exam

The front end of a vehicle vibrates up and down while traveling at most road speeds. Technician A says that too much radial runout of the front tires could be the cause. Technician B says that static out-of-balance of the front tires could be the cause. Who is right? (A) A only (B) B only (C) Both A and B (D) Neither A nor B - ANSWER-C. A vehicle wanders while being driven on level roads. Technician A says that too much negative camber could be the cause. Technician B says that too much positive caster could be the cause. Who is right? (A) A only (B) B only (C) Both A and B (D) Neither A nor B - ANSWER-D. A vehicle with rack and pinion steering has a shimmy. Technician A says that worn rack-to-frame mounting bushings could be the cause. Technician B says that loose inner or outer tie rod ends (sockets) could be the cause. Who is right? (A) A only (B) B only (C) Both A and B (D) Neither A nor B - ANSWER-C. During a wheel alignment, a technician finds the toe-out-on-turns (turning radius) to be incorrect. Which of these could be the cause? (A) Bent pitman arm (B) Bent tie rod (C) Bent idler arm (D) Bent steering arm - ANSWER-D. A vehicle pulls to the right during braking.