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Vehicle Is Disabled

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  1. Check for transmission fault codes using the appropriate scan tool.
  2. Check for cracked, leaking cooler lines.
  3. Check fluid level and condition.
  4. With the transmission in the Park position, attempt to rotate drive shaft(s) to ensure transmission output shaft coupler/flange is secure.
  5. Check the transfer case operation (if equipped).
  6. Raise and support vehicle on safety stands, start engine with transmission in the Park position and allow to idle for several minutes, shift transmission into gear, and note following:
    1. If propeller shaft turns but wheels do not, problem is with differential or axle shafts.
    2. If propeller shaft does not turn and transmission is noisy, stop engine. Remove oil pan, and check for debris. If pan is clear, remove transmission and check for damaged driveplate, converter, oil pump, or input shaft.
  7. Check the TCMA, Wiring, Valve body, and Solenoids (Utilize fault codes to diagnose if available).
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