Hi

Recently bought a au 2 Xr8 ute and i am looking at upgrading gears in the diff and i have a couple of quick questions.

What type of diff housing does the au2 xr8 utes come with?
What is the highest ratio gears i can get into the current diff?

Also another question about sat nav.

The car came with a factory sat nav system BUT it doesnt work. The actual display ubit LCD light displays but there is nother displayed on the screen.
Any ideas?

Regards