Go to www.4lo.com and use the gear ratio calculator. No t-case, so use "1" for the t-case ratio. --------------- Date: Tue, 26 Jun 2012 13:06:48 -0500 From: "Armand Eshleman"<aje1@xxxxxxxxxxxxxxx> I have a 2.73 ratio in the rear axle, the rear tires are 245/45R-16. The tire is 24.7 inches in diameter The T5 has a 3.35 first gear. Fifth overdrive is .63 Can anyone expand on this? What speed will the car be going in first gear at 2000 rpm. What speed will the car be going in fifth gear at 2000 rpm. I know there's a formula for this bt of course my used up brain cells cannot figure it out. thanks, Armand -- Frank Swygert Editor - American Motors Cars Magazine www.amc-mag.com _______________________________________________ AMC-list mailing list AMC-list@xxxxxxxxxxxxxxxxx http://list.amc-list.com/listinfo.cgi/amc-list-amc-list.com