rear end

All, I have a 2018 2 seater X3 XRS with the front locker. As many threads talk about my suspension needs to be tuned bad. The rear end kicks off any sort of bump or ledge very dramatically. Any jump over 15 mph I feel like I would land on the roof. I have watched the youtube videos and have...

I need some help guys. I've been researching all day and haven't found anything. Last night I was riding around the house and punched it and when I let off the gas it made a horrible grinding noise. I started messing with it a little and if I go over about 10 mph and let off the gas it makes the...