This site has a T5 tag identifier. Won't tell you gear ratios.
T5 tag identifier Ol' KCMongo has a PDF listing of tag numbers and the respective gearing.
T5 tag numbers and gears I think it'd probably be best to physically run thru the gears and count revolutions as sometimes you'll not be able to read the tag numbers. At least 1st and 5th gears. Takes the guesswork out. You know exactly what yer gettin'.
-David
Kustoms-and-Sleds
