Differential

Having bought two Sierra 7" differentials - ratio 3.62:1 or 3.92:1 after much deliberation and discussion I decided that I would install the 3.92:1 unit as this will give me the best all round performance. I have also decided to upgrade the standard type 9 gearbox to BGH close ratio fast road specification (on the wish list). The diff was prepared (shot blasted and laquered) and ready for installation.