What would I look for to diagnose worn/weak leaf springs?

I haven't noticed any broken bits, noises, and unloaded the height looks fine.

TIA!!!....

 

My diagnosis would be if the driver's side rear is sitting over an inch lower than the passenger side rear. There will naturally be a small difference due to the fact that Dodge/Chrysler put all the heavy stuff (battery, gas tank, etc.) on the driver side, but to much means they are worn out, IMO.

 

ahhhh, so thats why mines 1 1/4 in off...lol, ive been trying to solve it for so long hahahahahahaha, and what you said makes complete sense.

 

The front driver's side coil spring sags a little more than the passenger's as well, due to the weight of the before said items being placed on the driver's side, but that should usually only cause less than an inch of difference.

If you are **** about it, like I was, you can replace your springs AND install a 1" spacer on the driver's side front coil. Now my driver's side is about 1/4" higher than the passenger. Thats perfect by my reckoning, as when I get into the vehicle my 220+ lbs drop that down.

 

The way I diagnosed mine was when my son (about 175 lbs) sat on the tailgate with the bed empty and it dropped down very obviously. Unloaded it looked fine. So I replaced the 1.5" spacer up front with 2" Skyjacker coils, and put a 2" trailmaster long-leaf add-a-leaf in the rear. It looks nice now; rides nice too.

With the 2" coils up front, my front tires shifted maybe 1/4" - 3/8" on an inch. Definitely not noticable (so no trackbar interventions needed).