1fast86

If the motor is stock 3.73 is best with 5-speed(especially with gas prices at $3.55 per). If AOD is in the car go 4.10. 3.73is a good all around (hwy/street) gear for a stick driven on the street alot and it will give you plenty SOP improvement over the 3.08.

nitrous_bob

+1 4.10's

+1 on aod cars you cannot correct past 3.55's , actually 3.27 uses the 21t speedo gear and the 23t is not a ford part, it will get destroyed by driving and is worse in aod cars (aod and t5 have different pitch of teeth)

anyways... the 3 top bang for the buck mods you can make... hands down....in order

1) gears and tires
2) nitrous
3) heads

AdderMk2

with the maximum correction you can get, you would be doing 70mph at ~2211 rpms (correction for 3.55 gears)
at 2211 RPM's, with 4.10 gears, and the correction for 3.55's you would be traveling at 60.6 mph

so your speedo would be about 10mph fast at 60mph(which means you would rack up the miles faster too)

5ohstang

hey i got a quick question... i have a 90 gt 5 speed. i put 3.55's in a while ago but my rear is in need of a rebuild. i want to go with 3.73's. what will i be tacking at when cruising at like 65 to 70 mph? thanks

AdderMk2

75 mph will put you right about 2500RPMs