bb1211

i'm cosidering getting 4:10 gears. my question is are they going to affect my speedometer, i mean am i going to be doing 30mph and actually be going a different speed?

Fat Nick

Yes they will unless you buy a predator, or a speedcal.

bb1211

whats a speedcal

Fat Nick

It is just a tool to recal. the speedo and involves no upgrading the computer performance wise. They are sold at www.dallasmustang.com

DuckyGt

you need a programmer your speedo is going to be 20mph off on the free way

The Great Cornholio

In this case take 4.10/3.27 X actual speed, in other words if you are actually going 30 mph your uncorrected speedometer will be showing 38 mph with 4.10 gears. If you are actually going 60 mph your speedometer will read 75 mph,and if you are actually going 80 mph (my preferred cruising speed) your speedometer will read 100 mph.

boostedgt02

Is it hard to install these gears?

The Great Cornholio

It's not particularly hard, but it requires several tools that not everyone has to set the gears up properly. I have done it but it's worth it in my opinion to have a competent installer do the job.

boostedgt02

What kind of place should I go to to get this type of thing installed?

The Great Cornholio

I went to a highly recommended (deservedly so) speed shop. I posted on some sites and asked for recommendations in my local area.