For any interested, I suggest that any time a wound is suffered by a vehicle, you roll once on the appropriate damage chart.

The CC represents the driver's ability to run over people in Close Combat.

The MW represents the Gunner's ability.
The ST represents the vehicle's ram value.
The MV represents the vehicle's Move.

Troop CC MW PW LD AC W ST MV A Notes Dreadnought 15 14 -- 10 3 6 3 5 26 Nobz Bike 13 13 -- 12 3 2 2 9 22 Scorcher 13 13 -- 12 3 4 3 10 22 Warbike 13 13 -- 12 3 2 2 9 22 War Buggy 13 13 -- 12 3 3 3 9 22 Wartrak 13 13 -- 12 3 3 3 10 22