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Old 09-25-2020, 11:34 AM   #1
Junior Member
Join Date: Aug 2020
Posts: 18
Leaf springs, axles and payload capacity

How do rear leaf spring weight capacities and rear axle weight rating go together to determine payload capacity?

My 2500 truck has 5 leaf, 2600 lb. rated leaf springs and a 6000 lb. rated rear axle. Stated payload capacity is 2599 lbs.
I am thinking of upgrading to 3500 7 leaf springs with a weight rating of 3300 lbs. That is 700 lbs. more per side. Times 2, that would be a theoretical increase of 1400 lbs. Would that increase my payload by that much or some fraction of that? Or nothing at all? I know that some say that nothing done outside of the factory can increase payload but beefier springs must do something. The question is how much.

(PS - truck already has oversized wheels and tires - - - the same size that came standard on the 3500's for its year)
yukongold is offline   Reply With Quote
Old 09-25-2020, 04:30 PM   #2
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Join Date: Jun 2016
Posts: 794
No it doesnt change the payload rating.

Still just with the numbers you put out, the limit will be the 6000 pound axle instead of the 2600 pound springs.
Hersbird is offline   Reply With Quote


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