It seems that my rear spring and or shackle bushings are going bad. When I let off the brake from a stop or accelerate from a stop the rear of the truck seems to drop suddenly, not far but noticable. I know weight transfers to the rear, but this is more of a jolt, not just the suspension moving. Is it hard to replace all the spring and shackle bushings? Also, how does the ORD shackle reversal affect load carrying capacity. My stock springs appear to be in fine shape so I think if I go to the trouble to replace all the bushings I will get the reversal also. I don't really off road much, would I be better just getting some new 4" rear springs and avoid all this hassle?? If so what brand springs are about equal to the stock rear springs rate and ride? Lots of questions. any advice would be great.