Gear Ratios

[ron]

I have converted the engine & gearbox on my M715 to Mitsubishi.
As I understand the old gear ratio i.e Tornado Engine Original Gearbox was:

1st 6.398:1
2nd 3.092:1
3rd 1.686:1
4th 1.00:1

My new engine gearbox ratio are:
1st 5.494:1
2nd 2.836:1
3rd 1.592:1
4th 1.000:1
5th 0.746:1

I'm still using the original transfer box i.e NP200
Anybody know how to work out the speeds with standard tyres or even the formula for calculating the speeds.
Thanks.

[rpgdeity]

The formula I use for calculating speed is:

______(Engine RPM * (3.14 * Tire Diameter / 12)______
(Transmission ratio * Transfercase ratio * axle ratio * 88)

[ron]

Many thanks for the info, working it out right now.

[Mikel]

No need for hard work

http://4lo.com/calc/gearratio.htm

[Swampthang]

Are you talking about recalibrating the speedo? If so, it drives from the transfercase and would read the same with either tranny.

[brute4c]

You can always download this spreadsheet, change the gear ratios to whatever you need and poof!

http://www.m715zone.com/jonmisc/RPM_Calc.xls