Service Procedure: Overview

NOTE:
BEFORE DIAGNOSING A 4-WHEEL-DRIVE VEHICLE, MAKE SURE IT IS IN 2WD AND THE FRONT HUBS ARE UNLOCKED.

1. On smooth pavement, drive the vehicle at a constant speed and feel for the "float" condition:

a. This is the narrow, neutral range where the driveline can be said to "float" because neither accel nor decel forces are being applied to the driveline.

b. It is important to accurately identify vehicle behavior in "float" mode because the diagnostic routine to be used will depend on Noise/Vibration/Harshness (NVH) characteristics during float.

c. It may be necessary to drive the vehicle several minutes before the sensation can be clearly identified.





2. Perform the Driveline NVH Diagnostic Procedure shown in Figure 1 BEFORE replacing any components.