https://images-na.ssl-images-amazon.com/images/I/61OezgDH5DL._SL1500_.jpghttps://www.youtube.com/watch?time_continue=58&v=qRl4pRTvRz4The ARB up front has spider gears just like the diff you currently have. It will act the same way......it will send torque to the tire with the least traction until its engaged.
With the arb engaged, it will act like a spool up front; both tires will turn the same, whether they have traction or not. So when you turn, you will be pushing one tire and dragging the other. Many times I'm looking at an obstacle and thinking, I would like to have both front tires pulling, but I would also like to be able to make that sharp turn at the top of the rock and miss that tree.
One other thing you will find out. Lockers don't always engage or disengage when you flip the switch. Sometimes you have to drive forward a little until the dogs in the ARB line up and engage. If the drive line is under load, you may have to drive a little way for the arb to disengage. Same with e-lockers.