you do know that without some modifications and rewiring, the factory Elocker can only be used in 4LO, and i think only under 25mph(? not 100% sure on that last part). if it where me i would not have that as a "requirement", so much as a "bonus" or "nice feature" as i dont think you would really use it all that much, judging from the conversations we have had and how you say you would be using your rig. also know that having a factory Elocker will raise the value of the vehicle for the seller(if they know about it, most do). so it could be cheaper to have a LSD(truetrac) installed for your everyday 99% driving, it will be more useful to you i think than a locker