Speed Calculator

[BrianG]

Originally Posted by coolhandcountry

My question is brian. How many times does the input shaft spin to one turn of the output shaft( aka axle to the tires)?

Oops, I guess I misunderstood your post.

The Jato tranny is a little different. You have the input shaft containing the input gears. Then you have an output shaft that has the first gear, second gear, and the output gear together. Then the diff gear is tied to the output gear.

2.066:1 in single speed conversion. Add the "output gear to diff gear" ratio of 1.9:1, that is 3.925:1. Add the stock 54T spur and 22T clutchbell (2.454:1), that equals 9.632:1 total.

2.286:1 in first gear. Add the "output gear to diff gear" ratio of 1.9:1, that is 4.343:1. Add the stock 54T spur and 22T clutchbell (2.454:1), that equals 10.658:1 total.

1.706:1 in second gear. Add the "output gear to diff gear" ratio of 1.9:1, that is 3.241:1. Add the stock 54T spur and 22T clutchbell (2.454:1), that equals 7.953:1 total.

As you can see, you have to treat the output gear of the tranny as part of the diff even though it's on the same shaft as the first/second tranny gears.

All these values agree with the chart in the Jato manual.

I hope I didn't misunderstand your question again.