We installed manual locking hubs (MM) and a lunchbox locker (Spartan) on the front axle of our 2019 Roxor. After studying the info on this excellent forum, we chose this configuration to manage switching between on-road and off-road use. We tested after the install and were quite pleased with the results. Our summary...
- Yes the front locker does present forces that work to bring the wheel to the center, but it's easily managed and is easily disengaged with the locking hubs.
- Testing on gravel and pavement, we had to make fairly severe turns to forcibly slip the locker. Again, locking hubs can be easily disengaged for on-road travel, but if we desire to make short runs on pavement in 4wd without unlocking it is doable.
- The front lockers increased our capability to climb steep hills and traverse over breaks to a shocking degree. The off road capability is very much enhanced.
- We did not experience the loss of turning radius that many reported. The turning radius presented the same as typical 4wd that we started with. Prior to installing, we adjusted our steering stops to maximize our turning range with the tire's we're running.
The only apparent sacrifice in this config is that we don't have the ability to use rear diff lock as a mid-performance zone between 2wd and 4wd. We would need to install rear lockers to enable this feature. However after seeing how they behave on the front axle, we're not nearly as hesitant to consider LB lockers on the rear as well. However, we have not experienced how rear-lockers would affect driving at highway speeds and in varying conditions. I have seen some posts that suggest this is an issue.
For now, this configuration is able to perform very well both on and off the road. Very happy with both the ease of install and the performance. Love the Roxor.