Initial Inspection and Diagnostic Overview

1. Road test the vehicle to verify the concern, noting the road speed, engine speed, and speed range where the vehicle problem is evident.

NOTE: Owner driving habits as well as road and weather conditions should be noted.

2. Raise the vehicle on the hoist and position suitable safety floor stands under the vehicle.
3. Run the vehicle at the road speed where the concern exists. Verify concern area:
- Engine.
- Transmission.
- Front/rear driveline components.
- Front/rear drive axles.
- Front/rear brake systems.
- Front/rear wheels and/or tires.
- Transfer case.

4. Refer to the appropriate owner guide for operating data, if the concern is verified to be driveline or torsional windup, before servicing the transfer case.
5. Check tires and vehicle load if the problem is clearly driveline windup and not broken parts.