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Showing results for tags 'diff ratios'.
Hi, Just a quick check that I'm not barking up the wrong tree with rear diff ratios... I'm currently running a 7" 3.62 ratio rear diff from a Sierra. I would like to improve the acceleration of the car (not worried about top speed) so am considering buying and reconditioning a 3.92 ratio rear diff. I have an ST170 zetec engine. I'm just checking that I am going in the right direction (ratio speaking) - higher ratio, better acceleration (lower ratio, higher top speed). Is this correct thinking ? Any thigh else to be considered when changing diff ratios? Any downsides to doing this ?