"Troy" > wrote in message
news
> I have an 01 jeep tj 6 cyl. 5spd manual
> I'm down here in Florida, so there's not really any rockclimbing going on
> with me, mostly mud and sand.
>
> I'm thinking that I may just stick with the 33's for now, or at least
until
> they wear out, but they're almost new. With the jeep I have and the 4.56
> w/33's... How many RPMs will I be turning at 70? People drive crazy
here,
> I have to keep up.
>
> Troy
>
>

RPM = gear ratio x mph x 336 / tire diameter.

So in your case 3250 RPM without overdrive and then multiply that by the
overdrive ratio of the trans. It is usually about .7, so you should be about
2275 RPM

Chris