Need Suspension help

I recently measured my 2012 Tundra TRD 4wh drive rear left and right ground to wheel housing (unloaded) and found a 1'5" difference form one side to another. I've owned this vehicle since 2015 and have never replace the rear shocks. I often pull a half ton trailer and am wondering if I should replace rear shocks for Rite-Aid air lifts.
What say you the people

 

Well I’ve got black oem shocks you can have. They have 30k on them I’m in Riverview.

 

The lifespan of the black ones isn't much more then 30K though.

 

I didn’t know that. My bad then in the garbage they go I reckon.

 

You can test them. They may work for someone as a temporary solution. The black ones are the most basic that Toyota put on these trucks.

 

Yea figured I’d offer them nonetheless as I move this week and the dumpster is growing ever tempting for these.

 

I hear ya. I still have headlights from my 2013 sitting in my garage.