ok so ive had my 3.73s in for like 6 months, and still havent found a way to correct the speedo[:@]im being told that with the VSS i need a tune to correct it cause its all electroincs and that i need to replace gears and sleaves, what do I need its driving my nucking futs, its a 92, 700R4 auto, 26" tall tires, 3.73 rear, do i need a tune or do i need a gear and if so, from where?