I installed Rancho 5000 shocks on my 01 4x4 Sunday. I didnt feel it was neccessary to spend the extra money for the adjustable 9000s. A couple of things do concern me about the shocks. This is their overall length in comparisn to oem shocks. Compared to the oem shock the Ranchos,when fully extended,are over 2" shorter. This tells me that there is 2" less of free travel before the shock runs out of upward travel. This is true front and rear. Has any one run into a problem with this?The truck does seem to drive better ands does seem to have a firmer ride.