this has all the gear ratios for every ford tranny (except for the 2004 mustang one...
not gonna comment on that)
http://www.vibratesoftware.com/html_...sions_Main.htm
site w/ correct ratios:
http://www.supercarsite.net/mustang_mach_1.htm
this is a speed/gear/rpm calculator:
http://www.allfordmustangs.com/Detailed/608.shtml
EDIT: Updated using .62 gear ratio, my bad
to save you all the trouble:
80mph at gear ratio:
3.55 = 2304
3.73 = 2421
4.10 = 2661
4.30 = 2791
4.56 = 2960
top speed w/ 3.55s, 5th gear @ 6798rpm (closest w/o going over 6800) = 236mph (obviously none of us will ever see anything close to this speed, so complaining about 'losing' top speed by going w/ a higher gear is pointless)
top speed w/ 3.73s, 5th gear @ 6780 = 224mph
top speed w/ 4.10s, 5th gear @ 6787 = 204mph
top speed w/ 4.30s, 5th gear @ 6769 = 194mph
top speed w/ 4.56s, 5th gear @ 6771 = 183mph
anyway, point is, doubt anyone is gonna 'lose' top speed... at least this was the main worry w/ 96-98 gt's :p (god it feels good now that I can rag on em :p)
EDIT: I guess I should update this thread with another calculation since this seems more appropriate now for my garage queen mach...
4th gear for manuals/3rd for autos (1:1), trap speeds at 6100rpm (stock engine peak) 6500 rpm (minor bolt-ons shift point), 6800 rpm (psr/cobra cams shift point)
HTML Code:
26" tire:
Gear 6100rpm 6500rpm 6800rpm
3.55: 133 141.7 148.2
3.73: 126.5 134.8 141.1
3.90: 121 129 134.9
4.10: 115.1 122.7 128.3
4.30: 109.8 117 122.4
4.56: 103.5 110.3 115.4
28" tire:
Gear 6100rpm 6500rpm 6800rpm
3.55: 143.2 152.6 159.6
3.73: 136.3 145.2 151.9
3.90: 130.3 138.9 145.3
4.10: 124 132.1 138.2
4.30: 118.2 126 131.8
4.56: 111.5 118.8 124.3
4.88: 104.2 111 116.1
I now prefer this calculator if anyone cares:
http://www.4lo.com/calc/gearratio.php