JGAN Posted January 18, 2022 The rear end on my 2012 NV 2500 HD V8 high roof is sagging when fully loaded. I heard upgrading to the 3500 leaf springs was possible. Has anyone done this, and did it require any modification or did they just bolt up? Also, does the 3500 leaf spring have more leaves than the 2500? Looking on ebay they seemed the same. Wondering how they get that extra payload in the 3500. Quote Share this post Link to post Share on other sites
crusty Posted January 18, 2022 They just bolt in. Number of leaves are the same, just the thickness is different. They are heavy! Quote Share this post Link to post Share on other sites
