We all know that these trucks are rated at 5/4 ton. That means that the rated payload for these trucks is 2,500 lbs (cross-country, we're allowed 3,000 lbs highway)
Spring rate? This is the rate of deflection per amount of load. It is expressed as lb/inch (how may pounds of loading will it take to deflect the spring 1 inch)
Our front springs are rated at 515 lb/in.
The rear springs are rated at 715 lb/in (cool, huh?)
Here's the good part - (515 x2)+(715X2)=2,460
Now, Payload/2,460 = 1.02 inch = the amount of total "squat" the truck would experience at rated cross-country payload capacity!
Even at the rated highway laod capacity of 3,000 lbs, the truck would only squat 1.22 inch!
Thus, if you load an M715 with stock suspension to the point of visible squat - you're probably overloaded.
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