Chassis Building 101. Ride Height

[Twentyover]

So if the total rear weight is 1400 and the Un-Sprung is 476, that leaves only 924 lbs of Sprung weight. Do a little math and you get an Un-Sprung percentage of 51% !!!!! So think about it, when the trucks back tire hits a bump (one side) and 238 of mass is now moving 'up', it's easier to 'lift' the back of the truck, 462 lbs, than it is to compress the spring.

Think you need to try the math again 476/1400, not 476/924, for closer to 35% unsprung weight, but the rest is good