Front Axle - Vibration Misdiagnosis

84ford10

Article No. 84-17-10


HALFSHAFT DAMPERS (R.H.) - HIGH RUNOUT MISDIAGNOSED AS CAUSE OF NOISE/VIBRATION


FORD 1984 ALL TEMPO

LINCOLN-MERCURY 1984 ALL TOPAZ

Halfshaft damper runout has been misdiagnosed as the cause of noise/vibration in the subject vehicles. This misdiagnosis has resulted in needless halfshaft and/or component replacement. Halfshaft assemblies rarely, if ever, contribute to vibration disturbances due to their low rotational speeds (approximately 1/3 that of rear wheel driveshaft speed).

FIGURE 9:

Maximum runout specification of .25 inch has been established for the right hand halfshaft damper assembly and may be checked as indicated in Figure 9. Do not replace the inter-connecting shaft and damper assembly for a vibration concern unless damper runout exceeds .25 inches.
OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: "INFORMATION ONLY"