yes, the solid front axle is the same thing as a locked diff the only difference is that a locked diff has a chance of slipping because it is just two diff halves tightened down all the way, where as a solid front axle is just one solid piece so there is no chance of slippage, if i can get the locked diff to work well on carpet i will probaly get a solid axle for the sake of not having to worry about slippage.