I've been advised to just change diff ratios to 4.1.1. as this will bring gearing back to normal when 35s are on and downhill gearing will also improve.

Also less stress on drivetrain.
However on 33s she will Rev higher just how much this will affect fuel economy isn't clear but apparently the engine will be running more efficiently.

Has anyone just done the diff ratios and found it OK when running the smaller tyres and what it's like running 35s downhill.