this is not my first rancho shock. I have had the old rancho 9000 shocks. there was no compression dampening with those. the new 9000xl gas shocks adjust both compression and rebound, what a difference. my jeep TJ with a 4" lift had the usual side sway. this helped to slow that down.im on #3 for street use as of now. I need to put more miles on them to loosen them up some. very happy for now,6 more adjustments for off road. mike