Absolutely not. In my Rubi I probably use the front locker only 1 out of every 5 times I use the rear. A rear locker helps A LOT. The front locker is primarily of use in clawing the front tires up over single, large, near-vertical obstacles (read "rocks") that the rear tires can't push you up. Plus, unless the conditions you are in have very poor traction (lots of slip), a front locker makes steering difficult. A locker on eiher end, in any vehicle, WILL make it a lot easier to break things (axles, CVs, diff). When using a locker you have to really keep the skinny pedal under control. A locked axle doesn't care much for driveline shock (a revved-up, fast-spinning tire suddenly gaining traction and stopping movement). Lockers kick ass, but drive responsibly with them (you should anyway to minimize trail damage).