[01Z71GMC]

I've got to drive my truck back home from the shop where it was lifted. Close to 120 miles, some interstate. New 35 inch SSRs. I am not going to be able to reset the speedo until I get back. is there a calculator on line somewhere that i can figure out what the speedo will read when I am actually doing 65?

 

[Slvrpismochevy96]

here----- http://www.merkurtech.com/merkurtech/downloads/GEAR SPEED CALCULATOR.xls

You will need to put in your rear axle ratio, tire size and the gear ratios for the 4l60e

 

[Slvrpismochevy96]

Here are the ratios for the 4L60E, 1st is 3.06, 2nd is 1.75, 3rd is 1, and OD/4th is .7

 

[Kal]

here----- http://www.merkurtech.com/merkurtech/downloads/GEAR SPEED CALCULATOR.xls

You will need to put in your rear axle ratio, tire size and the gear ratios for the 4l60e

That one is pretty good.
Check this one out
http://www.miata.net/garage/tirecalc.html

 

[BDZ71]

HERE Is all you need to know Wade.

The first calculator on this page :read: No need to put in all that info when you dont need to.

It seems to calculate right. My speedo was off about 7-8MPH at that speed. I was reading 55 and doing about 62-63 I had my GPS with me to check it. and the GPS is right on the money so I know what I was going.

 

[01Z71GMC]

Thanks guys,

Let me get this straight. With a 3.73 and 35 inch tires I am going to be doing 120 mph at 3000 RPM. :jawdrop: