What size gears do I have in my Differential?!?

Question

I have a 2002 v6 ford mustang. I have a 7.5 diff., I heard by changing the gear I can get better acceleration.... I was thinking of 3.45 because I dont want to hurt my gas milage... but I dont even know what size I have in there right now? Does anyone know the size of my stock gears and would 3.45 give my slugish car a good jump?!

Answer 1

look all over the axle and gear housing. look for a tag or stamped numbers. this will identify the the type ratio you now have. more than one type could have been used 2002..

Answer 2

3.73's would be better for acceleration, but will hurt mpg a little..

this site says you have a 3.15, so the 3.45 might be enough.,

http://www.mustangspecs.com/years/02.sht...

Answer 3

If you're not racing, stay with the 3.45 if you care about mpg's. I have 3.55 in my cobra. and it accelerates fine, yet gives 25mpg on the hwy in OD.