2000 Bigfoot transmission issue?

[TeTris MoNk]

Hey, new here! Just did all 6 axles to HD bearings and noticed that in either Low or High gear, the right side doesn't spin, but the left side of the agro spins when given throttle. Is this a differential transmission thing and I'm worrying about nothing, or did I do something wrong on reassembly?

[dirtdobber]

It's an open differential thing. Apply a little brake to the spinning side and the other side should spin.