Gears - to answer the questions once and for all

[Fosters]

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)

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