Re: Rear Gears
factory is 3.27 in 99-04, 2.73 in 94-98, and 3.31 in 05+
3.55 is a ratio for 8.8's 3.45 is available for the 7.5 rear as well as 3.73,4.10, 4.56; however none were a factory option for the V6 mustangs, the rangers had 3.73's and 4.10's you can snag and use yourself
if you have the gears out, count the teeth on ring and divide by the # of teeth on the pinion, that gives you the ratio, hence 41/11=3.73 41/10=4.10 etc..
and what you're saying about driving at 80 and checking the engine rpm's is wrong..
80mph with 3.27's in the third gear of an auto (1:1 ratio) would be ~3420rpms
so that is useless to go by
BV heads, P&P lower, comp 218/226 cam, 4.2 bottom end, 3k stall, flow 40's, O/R x-pipe, Pacesetter lt's, SCT xcal2 (93 Ortizperformance tune), Windstar upper, 65mm tb, CAI, 8.8 w/ 3.73's, SFC's, cut springs, KYB shocks/struts, MM LCA's
blower/new cam soon
Dealer for Ortiz Performance, great tunes at a good price!