Here is a MPH gear calculator I put together when I was researching a T56/TK0-600 for my project car, I have converted it to compare the 60 and 80. It also shows the gear extension/drop between shifts to show how close the ratios are, however it does not take into consideration the amount of RPMs the Torque converter would eat up.

Just plug in the numbers you need, Oh and just type in the Red fields (tire size, gear ratio, and shift points).


Anyways I hope it helps someone, I know I am always looking for a gear calculator and I am tired of using the one on Richmond gear.




Updated: Added Tire size calculation...

Looks Good this will help alot for tuning........

Wow nice work! Thanks for taking the effort to do this.

Holy poopy...NICE work!

excellent job on the spread sheet, thanks!

Glad yall like it, I know when I set it up for the manual comparison it really help realize which tranny had the closer ratio.

I dont have excel

Try this free excel viewer.
http://www.softwarepatch.com/software/excelviewer.html

OK I didnt need to know I been 139 in my truck



Thanks for the work man. This is a nice tool

ok so im on a 29.2" tire shifting at 6600 1-2 but my speedo only shows 40mph where the calculator shows i should be going right around 46mph.
Click here to watch 30-60-75
is this because the converter is unlocked or the dummy guages we get? the speedo jumps on the shift too. is that just the speedo catching up?