I feel your pain . . . . my 02 Cummins 2wd, had 65k miles on it last year, when I decided I should replace the original factory shocks . . . . hmmm, that should be a no brainer . . . went to online and researched with I thought I would need, and ended up getting (4) Monroe Gasmatics, or whatever they call them. All information said they were for the 8800GVW rating of my truck . . . . got everything installed no problem. . . proceeded to then take my travel trailer out and IMMEDIATELY knew that the shocks were NOT for 8800GVW . . .MUSH, and Bouncy !!! . . . the old shocks I took off, were wayyy better !!! . . . UGGHHH . . . not taking these back !!! SO, finally found EXACTLY what I needed, just need to get under the truck and put them on . . . .