While I was driving bulletproof prado 2011 (keeping in mind bulletproof version weighs aprox 1000kg more than normal prado ) , I shifted the gear to N (neutral) from D(drive), gave it a good accelaration while in N and then suddenly put the gear in D (drive). The jeep jerked, it made a horrible sound and then stopped taking acceleration. The jeep is starting perfectly but when I put it to R(reverse) or D , it makes sound probably in the gearbox area and doesn't take gear. Is the gearbox damaged or the clutch wire broken. someone please suggest a good mechanic in Karachi