Regearing 101

[daylower]

I was cleaning out my computer and came across these gearing formulas and graphs I got from a message group email awhile back. I think it would help the people out there thinking about regearing and will probably answer most of, if not all questions guys are having about which gears would work best for them. I dont know if it meets sticky requirements, but I think it could be helpful for future purposes.

 

Formulas:

 

Chart:

 

I think the chart is pretty self explanatory, the colors represent ideal RPM's at highway speeds at 65 MPH.

 

***Highway cruising and best fuel economy stay towards the yellow (2600 rpm)

 

***Around town daily driving is color coded green (2800 rpm)

 

***Better towing power or just more 4-low power use the ratios near the red (3100 rpm).

 

The calculations are based on a manual transmission with a 1:1 ratio. Driving an automatic, your RPMs will be slightly higher, with the opposite being true if you have overdrive (your RPMs will be slightly lower).

[Se77vN]

I was cleaning out my computer and came across these gearing formulas and graphs I got from a message group email awhile back. I think it would help the people out there thinking about regearing and will probably answer most of, if not all questions guys are having about which gears would work best for them. I dont know if it meets sticky requirements, but I think it could be helpful for future purposes.

 

Formulas:

 

Chart:

 

I think the chart is pretty self explanatory, the colors represent ideal RPM's at highway speeds at 65 MPH.

 

***Highway cruising and best fuel economy stay towards the yellow (2600 rpm)

 

***Around town daily driving is color coded green (2800 rpm)

 

***Better towing power or just more 4-low power use the ratios near the red (3100 rpm).

 

The calculations are based on a manual transmission with a 1:1 ratio. Driving an automatic, your RPMs will be slightly higher, with the opposite being true if you have overdrive (your RPMs will be slightly lower).

 

Well Im no mod, but I think this is def sticky worthy!!

[lsuguy]

Nice bit of info

Thanks!

[sc4808]

There is a couple of really good I Phone/Ipod Touch Apps with these calculators as well.

 

The best one is called "Tire Math"

[daylower]

Yeah I forgot all about having this along with the offset and spacing calculators I had in excel format. I figured this would reduce the amount of posts with people basically asking the same questions over and over again.

[brims]

How often does someone use tire/rear axle calculations to merit buying a piece of software for their phone to do it.

[sc4808]

How often does someone use tire/rear axle calculations to merit buying a piece of software for their phone to do it.

 

I think it was free or maybe .99 Cents, but either way I was just trying to be helpfull. To the OP, Nice Charts.

 

And to answer the question, I have used it 3 or 4 times in the last month or so, either to help people on Forums like this or for calculating my own gear changes. I own 6 4x4 trucks and 4 are lifted, two are running 33's, one is on 35's and the other is on 37's.