There are 82 choices

• 4x2
  • dual rear wheels
    • 3500 HD
      • base
        • 4.63 ratio (opt GK9)
        • 5.13 ratio (opt HC7)
      • wide track (opt 5T2)
        • 4.63 ratio (opt GK9)
        • 5.13 ratio (opt HC7)
      • wide track (opt 5T2) with wrecker prep (opt 5X9)
        • 4.63 ratio (opt GK9)
        • 5.13 ratio (opt HC7)
      • wrecker prep (opt 5X9)
        • 4.63 ratio (opt GK9)
        • 5.13 ratio (opt HC7)
    • Excluding 3500 HD
      • Without wide track
        • 131" wheelbase
          • 3.42 axle ratio (opt GU6)
          • 3.73 ratio (opt GT4)
          • 4.10 ratio (opt GT5)
          • 4.56 ratio (opt HC4)
        • 135" wheelbase
          • 3.42 axle ratio (opt GU6)
          • 3.73 ratio (opt GT4)
          • 4.10 ratio (opt GT5)
          • 4.56 ratio (opt HC4)
        • 154" wheelbase
          • 3.42 axle ratio (opt GU6)
          • 3.73 ratio (opt GT4)
          • 4.10 ratio (opt GT5)
          • 4.56 ratio (opt HC4)
        • 155" wheelbase
          • 3.42 axle ratio (opt GU6)
          • 3.73 ratio (opt GT4)
          • 4.10 ratio (opt GT5)
          • 4.56 ratio (opt HC4)
        • 159" wheelbase
          • 3.42 axle ratio (opt GU6)
          • 3.73 ratio (opt GT4)
          • 4.10 ratio (opt GT5)
          • 4.56 ratio (opt HC4)
        • 168" wheelbase
          • 3.42 axle ratio (opt GU6)
          • 3.73 ratio (opt GT4)
          • 4.10 ratio (opt GT5)
          • 4.56 ratio (opt HC4)
      • wide track (opt 5T2)
        • 3.42 axle ratio (opt GU6)
        • 3.73 ratio (opt GT4)
        • 4.10 ratio (opt GT5)
        • 4.56 ratio (opt HC4)
  • single rear wheels
    • 9000-9200 gross vehicle weight (opt 8S9)
      • 3.42 axle ratio (opt GU6)
      • 3.73 ratio (opt GT4)
      • 4.10 ratio (opt GT5)
      • 4.56 ratio (opt HC4)
    • Without 9000-9200 gross vehicle weight
      • 3.42 axle ratio (opt GU6)
      • 3.73 ratio (opt GT4)
      • 4.10 ratio (opt GT5)
      • 4.56 ratio (opt HC4)
      • 4.63 ratio (opt GK9)
      • 5.13 ratio (opt HC7)
• 4x4
  • dual rear wheels
    • Without wide track
      • 131" wheelbase
        • 3.42 axle ratio (opt GU6)
        • 3.73 ratio (opt GT4)
        • 4.10 ratio (opt GT5)
        • 4.56 ratio (opt HC4)
      • 135" wheelbase
        • 3.42 axle ratio (opt GU6)
        • 3.73 ratio (opt GT4)
        • 4.10 ratio (opt GT5)
        • 4.56 ratio (opt HC4)
      • 154" wheelbase
        • 3.42 axle ratio (opt GU6)
        • 3.73 ratio (opt GT4)
        • 4.10 ratio (opt GT5)
        • 4.56 ratio (opt HC4)
      • 155" wheelbase
        • 3.42 axle ratio (opt GU6)
        • 3.73 ratio (opt GT4)
        • 4.10 ratio (opt GT5)
        • 4.56 ratio (opt HC4)
      • 159" wheelbase
        • 3.42 axle ratio (opt GU6)
        • 3.73 ratio (opt GT4)
        • 4.10 ratio (opt GT5)
        • 4.56 ratio (opt HC4)
      • 168" wheelbase
        • 3.42 axle ratio (opt GU6)
        • 3.73 ratio (opt GT4)
        • 4.10 ratio (opt GT5)
        • 4.56 ratio (opt HC4)
    • wide track (opt 5T2)
      • 3.42 axle ratio (opt GU6)
      • 3.73 ratio (opt GT4)
      • 4.10 ratio (opt GT5)
      • 4.56 ratio (opt HC4)
  • single rear wheels
    • 9000-9200 gross vehicle weight (opt 8S9)
      • 3.42 axle ratio (opt GU6)
      • 3.73 ratio (opt GT4)
      • 4.10 ratio (opt GT5)
      • 4.56 ratio (opt HC4)
    • Without 9000-9200 gross vehicle weight
      • 3.42 axle ratio (opt GU6)
      • 3.73 ratio (opt GT4)
      • 4.10 ratio (opt GT5)
      • 4.56 ratio (opt HC4)