What do you do when jaguar XJ8 has gearbox fault?

When a Jaguar XJ8 displays a gearbox fault, it's essential to first check for any error codes using an OBD-II scanner, as this can help identify the specific issue. After diagnosing the problem, inspect the Transmission Fluid level and condition; low or dirty fluid can lead to shifting issues. If the problem persists, consult a qualified mechanic or Jaguar specialist for a thorough inspection and potential repairs, as transmission issues can be complex and may require professional expertise.