whats a way to test these trannys out to see which is which??i know ls tranny you test 3500rpm should be 80mph in 5th gear correct?? my tranny is at 75mph @ 3500 rpm. can someone let me know what the gsr and si test things are??

 

u can do your calculation here http://scirocco.dyndns.org/gears/

 

your final drive will also change you speed at diffrent rpm's

 

ttt more info plz

 

what else you want to know?