R&P = Ring and Pinion gear ratio. This is the gear ratio for the
differential. If you don't know what yours is, there should be a metal
tag under a couple of the cover bolts on the differential cover plate.

Art

Cal wrote:
> Bill,
> Thanks for the chart link! Looking at the chart, what is R&P? I understand
> that the top grey line is the tire size (we used 31" tires.) But i don't
> know what the R&P (the numbers in gray from top to bottom of chart?)
> represents.
> thanks for your help!
>
> cal
>
> "L.W.(Bill) Hughes III" > wrote in message
> ...
>> http://www.raingler.com/tech/speedoChart.asp
>> God Bless America, Bill O|||||||O
>> http://www.billhughes.com/
>>
>> Cal wrote:
>>> Several gears to choose from....how do you determine which one you need?
>>>
>>> cal
>
>