SRT Diagnostic Tool SRT Diagnostic ToolSelect your vehicle, describe the symptom, and get a specific diagnosis. Your Vehicle GC SRT Trackhawk Durango SRT Charger SRT Ram TRX Other SRT Describe the Symptom Diagnose Common Symptoms Ticking on cold start Transmission shudder Check engine light Brake fade under hard use Transfer case noise Supercharger whine Rough idle Power loss in heat