7.5 Differential Kit, 6 Spyder Questions

[coolhandcountry]

well you divide the pinion in to the spur and do the same for the diff gears and then multiple them by one another then take the new diff you are running and divide that into number you got by multiplying the old stuff.
70 divided by 14 give you a 5 to 1 ratio. with the diff ratio 37 / 13 give you 2.84 x 5 =14.23 divide that by the new diff you have 43 /13 =3.3
14.23 / 3.3 = 4.31 for you new spur gear ratio. Since you have 70 tooth spur just divide 70 by spur gear ratio 4.31 =16.21 so a 16 toothpinion

[RC Fan 4 Life]

Originally Posted by coolhandcountry

well you divide the pinion in to the spur and do the same for the diff gears and then multiple them by one another then take the new diff you are running and divide that into number you got by multiplying the old stuff.
70 divided by 14 give you a 5 to 1 ratio. with the diff ratio 37 / 13 give you 2.84 x 5 =14.23 divide that by the new diff you have 43 /13 =3.3
14.23 / 3.3 = 4.31 for you new spur gear ratio. Since you have 70 tooth spur just divide 70 by spur gear ratio 4.31 =16.21 so a 16 toothpinion

I'm not very good at math and that is confusing to me. Has anyone made a online calculator to figure this out? :)