The first set I had (doestech) lasted 3 years, the procomp ones I have took a dive today after about a year. Truck started violently bouncing at 70mph. I pull off the road and see one of my shocks completely blown out. Is it normal to go thru them this quick? They are the correct length and the truck is far from abused. TIA Oh yeah, recomendations for replacements? I have a 4" lift, no swaybar, and 33s. Mostly street use, with the occasional off pavement trip.