Verification of Condition

The following items must be checked prior to beginning the diagnostic procedures.

Know and Understand the Concern
In order to correctly diagnose a concern, first understand the customer complaint or condition. Customer contact may be required in order to begin to verify the concern. Understand the conditions as to when the concern occurs. For example:
- hot or cold vehicle temperature.
- hot or cold ambient temperature.
- vehicle driving conditions.
- vehicle loaded/unloaded.

After understanding when and how the concern occurs, proceed to verifying the concern.

Verification of Condition
This section provides information which must be used in both determining the actual cause of customer concerns and carrying out the appropriate procedures. The following procedures must be used when verifying customer concerns for the transmission.

Determine Customer Concern
Determine customer concerns relative to vehicle use and driving conditions, paying attention to the following items:
- hot or cold vehicle operating temperature
- hot or cold ambient temperatures
- type of terrain
- vehicle loaded/unloaded
- city/highway driving
- upshift downshift
- coasting
- engagement
- noise/vibration - check for dependencies, either rpm dependent, vehicle speed dependent, shift dependent, gear dependent, range dependent, or temperature dependent.