Have an 85(stock), 4x4, extra cab, purchased truck new, with leaf springs which are sagging. Depending on what I have loaded in truck I have 1-2 inches of movement before bottoming out on the rubber bumpers.

Have four leafs in front, all same thickness, and four leafs in back, one thick leaf and three thinner ones.

Thinking of having springs re-arc'ed to oem specifications but don't know what oem spec is. My Toy maint manual is silent on spec and have yet to locate this type info. on this web-site.

Re-arc shop would likely re-arc to what-ever I asked, but I would like to have an end-picture with a little more clarity.

Any ideas on how to ID the oem specs?