3.73 from 2.73 speedo differecne

[zooguy]

any idea how far it will be off

[zooguy]

"Going from 2.73s to 3.73s will set your speedo off WAY more than 10mph. You will certainly have shifting issues and a tune is absolutely necessary."

some one stated this on another thread and i want to know if any one has done this and is there any validity to the statement?

[will.i.am]

"Going from 2.73s to 3.73s will set your speedo off WAY more than 10mph. You will certainly have shifting issues and a tune is absolutely necessary."

some one stated this on another thread and i want to know if any one has done this and is there any validity to the statement?

Its a gear ratio, meaning, how off it is depends on how fast you're going. Example, it will be more off at 100 mph, than at 10 mph.

If my math is right, and I'm only about 50% sure it is, 3.73 is a 37% increase from 2.73, so take whatever you're speedometer says, and multiply by 1.37, and you'll get your actual speed. I think.

[dafhturbo]

mine read really high. I change from 2.73 to 3.73. It was showing 90mph on the speedometer & was getting passed by everyone in a 65mph zone. :laugh:

[Fastbird]

This: http://www.f-body.org/gears/ will tell you all you need to know. Choose your year/tranny combo, plug in the gear ratio, hit calculate, plug in new gear ratio, hit calculate, compare. EXTREMELY handy for the 93 guys if you're setting up a new speedo calibration box and need to fine tune the speedo calibration. I got mine spot on with a radar detector with this thing.

[zooguy]

some people say i will have shifting issues and that kinda scares me .... what are they talking about?

[will.i.am]

some people say i will have shifting issues and that kinda scares me .... what are they talking about?

Your ECM is set to shift at a certain speed (depending on throttle position, load, etc.). Your ECM sees whatever your speedometer says, however, that's not how fast you're actually going.

I'm not sure exactly what kind of problems it can cause, but that's why.