I have a 2000 Durango 4x4, 84,000k. The left rear leaf spring is broken at the very front of the eye loop right were it curves under. I'm replacing it with a new leaf spring assembly. My question is should I replace the right leaf spring assembly as well even though it's fine? Will the rear suspension stance be skewed with one new spring/one original spring? Or is it just a case of when you do brakes or replace shocks, you automatically do them in pairs?