I have made an Excel spreadsheet to use as a comparison. Click
HERE to open this in a spreadsheet file and you can use this to compare a stock gear ratio transmission to this transmission. You can also use this to substitute a 3.25 or 3.54 ratio instead of a stock 3.78 ratio to see the speed and RPM differences.
The problem is I cannot upload this as an attachmenthere. Therefore here is a direct link if the other one gives you problems:
www.model-a-ford.com/Ruckstell_3_Speed_Comparison.xlsx
.