I had an 07 Dodge 3500 dually. I lowered the rear by taking the 3 shims that are on the bottom of the springs, on top of the axles, and putting them on top of the springs. You could do it yourself or like I did, take it to a spring shop. Took less than an hour. It lowers the rear of the truck about an 1-1/2" almost 2". there is an article on the web that shows pictures but I don't remember where. If I can find it, I'll pass it on. Did not affect the truck in any way. Kerry
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