Because there are so many questions about gears, wheels, revs, rpms and mphs, here are the basic data for 2005+ Mustang RPMs in Gear 5 of a Manual Transmission

Wheel=17 Section=235 Ratio=55 Diameter=27.18 Revs per mile=742 -----------------------------

Axle MPH=55 MPH=60 MPH=65 MPH=70 MPH=75 MPH=80 MPH=85

3.31 1,531 1,670 1,810 1,949 2,088 2,227 2,366
3.55 1,642 1,791 1,941 2,090 2,239 2,389 2,538
3.73 1,725 1,882 2,039 2,196 2,353 2,510 2,667
3.90 1,804 1,968 2,132 2,296 2,460 2,624 2,788
4.10 1,897 2,069 2,241 2,414 2,586 2,759 2,931
4.30 1,989 2,170 2,351 2,532 2,712 2,893 3,074

Wheel=18 Section=235 Ratio=50 Diameter=27.25 Revs per mile=740 -----------------------------

Axle MPH=55 MPH=60 MPH=65 MPH=70 MPH=75 MPH=80 MPH=85

3.31 1,527 1,666 1,805 1,943 2,082 2,221 2,360
3.55 1,638 1,787 1,935 2,084 2,233 2,382 2,531
3.73 1,721 1,877 2,034 2,190 2,346 2,503 2,659
3.90 1,799 1,963 2,126 2,290 2,453 2,617 2,780
4.10 1,891 2,063 2,235 2,407 2,579 2,751 2,923
4.30 1,984 2,164 2,344 2,525 2,705 2,885 3,066

Wheel=18 Section=255 Ratio=45 Diameter=27.04 Revs per mile=746 -----------------------------

Axle MPH=55 MPH=60 MPH=65 MPH=70 MPH=75 MPH=80 MPH=85

3.31 1,539 1,679 1,819 1,959 2,099 2,239 2,379
3.55 1,651 1,801 1,951 2,101 2,251 2,401 2,551
3.73 1,734 1,892 2,050&nbsp

 

Very nice, I will add this to the stickies......it saves me from having to use or link the excel sheet

Can you include the auto also.

 

I would be glad to put together some other sets of tables.

Could you please tell me what the 5th gear ratios of the GT manual transmission (TR-3650) and the automatic transmissions are? I thought I knew, but I get different numbers from different web sites.

Also, do you want some other sets of wheels and tires added to this? Different MPHs?

 

2005+ Mustang RPMs in Gear 5 of an Automatic Transmission (0.71)

Wheel=17 Section=235 Ratio=55 Diameter=27.18 Revs per mile=742 -----------------------------

Axle MPH=55 MPH=60 MPH=65 MPH=70 MPH=75 MPH=80 MPH=85

3.31 1,599 1,744 1,889 2,035 2,180 2,325 2,471
3.55 1,715 1,870 2,026 2,182 2,338 2,494 2,650
3.73 1,802 1,965 2,129 2,293 2,457 2,620 2,784
3.90 1,884 2,055 2,226 2,397 2,569 2,740 2,911
4.10 1,980 2,160 2,340 2,520 2,700 2,880 3,060
4.30 2,077 2,266 2,454 2,643 2,832 3,021 3,210

Wheel=18 Section=235 Ratio=50 Diameter=27.25 Revs per mile=740 -----------------------------

Axle MPH=55 MPH=60 MPH=65 MPH=70 MPH=75 MPH=80 MPH=85

3.31 1,594 1,739 1,884 2,029 2,174 2,319 2,464
3.55 1,710 1,865 2,021 2,176 2,332 2,487 2,643
3.73 1,797 1,960 2,123 2,287 2,450 2,613 2,777
3.90 1,878 2,049 2,220 2,391 2,562 2,732 2,903
4.10 1,975 2,154 2,334 2,513 2,693 2,872 3,052
4.30 2,071 2,259 2,448 2,636 2,824 3,013 3,201

Wheel=18 Section=255 Ratio=45 Diameter=27.04 Revs per mile=746 -----------------------------

Axle MPH=55 MPH=60 MPH=65 MPH=70 MPH=75 MPH=80 MPH=85

3.31 1,607 1,753 1,899 2,045 2,191 2,338 2,484
3.55 1,724 1,880 2,037 2,194 2,350 2,507 2,664
3.73 1,811 1,976 2,140 2,305 2,470 2,634 2,799
3.90 1,894 2,066&nb

 

Here is a website that should help as well.
http://www.wallaceracing.com/Calculators.htm

 

Yea, great thanks John. I am now comfortable with getting the 4.10 gear with this chart. With gas prices these days i draft behind 60 mph trucks. 330 give or take rpm should not be that big of a deal. I only drive on the highway for about 10 miles anyway. I made a conscious decision to stop driving everyday in the summer once i get my gear and exhaust etc.... I have an 05 gt currently with 20 k miles.

what a fun car to drive.