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3.90 gears?

4470 Views 15 Replies 9 Participants Last post by  MooStang05gt
I have seen a 3.90 gear ratio on mustangtuning.com is anybody out there using this ratio? if so feedback please... im thinking of installing these or 4.10s on my manual 06 gt. i drive an average of 25-30 miles a day. 50% highway 50% city.
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i am running 4.10's and i drive it on the highway and in the city....works great no big difference a little gas mileage and some more rpm but it makes the car jump pretty good out of the hole.....i wanted 4.30's but went 4.10's for the best of both world kinda thing......:cool:
by the way i used the motive gear as well and no noise.....:cool:
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