I'm looking at a used 2016 Rebel with 18,000 miles on it. I am currently in a 2015 GMC Sierra. I was ready to drop the hammer on this deal when I realized that this truck does NOT have the anti-spin differential. What a let down... Why in the world do they even make a 4x4 with an open differential? Makes no sense to me. Crap. Has anyone put an aftermarket Limited Slip/Anti-Spin/Locking differential in one of these? How much did it cost? Thanks in advance...