your RPMs, tire size, and gear ratio???I put a T-5 in my '60 F100 292

and have no speedometer. Also the OD ratio I believe is .74 in this tranny.

'96 3.8 WC...

Look at the home page for this site.  Click on "Tech Articles".  Near the bottom of the list is a formulas post.  At the bottom of the page of formulas are ones for MPH and RPM calculations.

John

My tire dia is 27" Rpm=1800, gear ratio is 3.25. The speed????

Plug that in the "magic machine"  let's see the outcome

                                      Thx, Bill

TC

http://www.corral.net/tech/gearcalc.html