why is my truck not lowerd???

When you jump on your box does the truck go down further?

3rd pic is 18in wheel mono an 3in blocks passenger side all stock suspension 15in wheel

Yes it moves if u jump in the bed not like a "normal" mono leafedtruck woulddo tho feels bout like stock suspension

I think your driveshaft may be binding.

Sent from my SGH-T839 using Tapatalk 2

I second the drive shaft theory.

Does this mean you only did work on one side?