Visual Inspection

This inspection will identify modifications or additions to the vehicle operating system that may affect diagnosis. Inspect the vehicle for:
- Add-on devices such as:
- Air conditioning.
- Generator (alternator).
- Engine turbo.
- Cellular telephone.
- Cruise control.
- CB radio.
- Linear booster.
- Backup alarm signal.
- Computer.
- Vehicle modification.

These items, if not installed properly, will affect the Powertrain Control Module (PCM) or transmission function. Pay particular attention to add-on wiring splices in the PCM harness or transmission wiring harness, abnormal tire size, or axle ratio changes.
- Leaks - refer to ATF Leak Check.
- Proper linkage adjustments.

CHECK TSB'S
Go to all Technical Service Bulletins (TSBs) that pertain to the transmission concern and follow the procedures as outlined.