sagging coils or twisted frame?

[moodybo]

I have noticed that alot of coil equipped trucks tend to favor a lean to one side! I Really notice this by the unmatched body lines between the bed and the cab. I am shortening my lwb as soon as the weather breaks for warmer. What is a good way to check my frame to make sure it is not twisted instead of just a sagging coil spring? I dont want to cut the frame down to just find out that the bed is off align

[67ChevyRedneck]

It is usually not the frame or the coils. This is usually due to cab mounts being shot. They get old and squish. Put new rubber cab mounts on and it should be fine. A good way to measure a twisted frame is to have the body off and measure, measure, measure. Pick even reference points and measure across and diagonal. That should help you determine if it is twisted. I've never heard of coils "going bad." Hope this helps.