Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Diagnosis And Testing: Diagnostics: Notes
| Transmission Fluid Pressure Gauge 307-004 (T57L-77820-A) |
|
| Air Test Plate, Transmission 307-246 (T92P-7006-A) |
|
| Alignment Gauge, TR Sensor 307-351 (T97L-70010-A) |
|
| MLP-TR Cable 418-F107 (007-00111) or equivalent |
|
| Worldwide Diagnostic System (WDS) Vehicle Communication Module (VCM) with appropriate adapters, or equivalent diagnostic tool |
|
| Transmission Tester 307-F016 (007-00130) or equivalent |
|
| Trans Tester TR/MLP Overlay and Manual 007-00131 or equivalent |
|
| 73 III Automotive Meter 105-R0057 or equivalent |
|
| UV Leak Detector Kit 164-R0756 or equivalent |
Diagnosing an electronically controlled automatic transmission is simplified by using the following procedures. One of the most important things to remember is that there is a definite procedure to follow. DO NOT TAKE SHORT CUTS OR ASSUME THAT CRITICAL CHECKS OR ADJUSTMENTS HAVE ALREADY BEEN MADE. Follow the procedures as written to avoid missing critical components or steps. By following the diagnostic sequence, the technician will be able to diagnose and repair the concern the first time.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.