In ZJ's, I am aware of the options of the 4.0, 5.2, and 5.9 engines... was wondering if the rear coil springs in the 5.2 or 5.9's were any different than the rear coils in the 4.0. Difference in size due to higher weight capacity perhaps?

www.rockauto.com , check the part numbers between the 4.0 and 5.2 springs.

Ah, no difference in part numbers.. why did i not think to just do that? Haha thanks for the answer.