The Dodge Challenger Message Board

A speedo drive gear calculation has been added to these two spreadsheets that will tell you what speed you can do in each gear and at each rpm.

http://challenger.mpoli.fi/web/4SPEEDchart.xls is for 4-speed users.

http://challenger.mpoli.fi/web/AUTOMATICchart.xls is for automatic users.

Just bumping this up. I added the speedo drive gear part for some guys on Moparts. Hope it helps a few of you.