I have to run locked diffs all around on my crawler, makes sense since if the wheel jammed up against the rock is getting no power, ya got issues . I would agree with some cars running a spool helps, Most on-road and 4WD buggy guys run a super tight, if not spool front diff since it allows for STUPID fast cornering. locking the diff works good if you can sacrifice (on some cars) the steering it would give you [8D]