Originally posted by Brandon R
no it isnt 7.50....
you divide the spur number of teeth by the pinion number of teeth to get the ratio...in your case it would be 72/24=3.00
Yes it is 7.50.. you need to mutiply 3.0 by 2.5 ( the TC3's internal drive ratio.)
The formula for FDR: Spur/Pinion x your car's internal drive ratio= Final drive ratio