2015 ACLB TRD OR Suspension Specifications needed

Hi All,

My Taco has spent the day at the dealer, with them trying to identify if my truck is indeed sagging in the rear.

I'm wondering if there's a published specification sheet on the rear suspension, as every other vehicle I've owned there is a specification sheet with distances identified, such as top of rear axle to frame, shock extension at rest, etc..

Does anyone know if these specs exist for a 2015 Tacoma? I'd love to compare their measurement results to the published specs.

BTW, my truck has just over 10k miles...

Thanks