Dunno how to explained it. I noticed the behaviour on my BLM after i installed rear arb. Before install i dont go that fast so cant comment. What i notice is the rear felt a bit firmer with arb installed. The effect is there esp when nobody is seating at the back. Could be the rear suspension becomes too firm with a bit too hard bound rate after rear arb installed?Sorry, I dont quite understand why the rear should hop when he isnt braking