live axle
noun
: the driving axle of any self-propelled vehicle
the usual front axle of a passenger car is a dead axle and the rear axle is a live axle 
Principles of Automotive Vehicles
Principles of Automotive Vehicles- flash boiler
- flash bomb
- flash burn
- flash card
- flash color
- flash defilade
- flash drive
- flash factor
- flash flood
- flash forward
- flash freeze
- flash freezes
- flash freezing
- flash froze
- flash frozen
- flash grenade
- flash grenades
- flash hider
- flash hole
- flash in
- flash in the pan
- flash mob
- flash paper
- flash pasteurization
- flash photography