I want to change tire size and Rearend gears. what is the process of getting the speedometer to read correctly?
I have a base model GT with the 6 speed manual Trans. with the double overdrive 5th and 6th gear and a 355 gears
I would like to go to 4.30 or 4.56 gears.

 

Welcome to TMS!!! We are glad you are here. Thanks for posting on our site.

I could point you to several thread on here but I think it would be easier if you use the Search and I am sure you will find one that fits your needs.


Here is a sample of the threads I found by searching for "Speedometer Adjustment Tire Size"
https://themustangsource.com/forums/...archid=7194162

 

Steve if He Has a 2024 Finding a Way To Calibrate is Going to Be Problematic! I Assume He Does Cause He is In the 2024 Section?

What Say Op You got a 2024!

The Aftermarket Has Not Got a Lot of Stuff For These Yet in Regards To Tuning Due To Big Brother Electronics!

If Something Is Available Somebody Please Chime in!

Might Want To Check Out a Specific 2024 Mustang Site and Find The Latest & Greatest!

https://www.7thmustang.com/

KC

 

Here are Some youtube Vids Which Claim To Have Broken The Tune Barrier on The S-650 Give Em a Look! If They Can Tune it They Should Be Able To Do Speedometer Correction as Well!

Enjoy,

KC

https://www.google.com/search?client...+tuner+youtube

 

Thanks for the replies. I'm an old motor head 70yo. I have no clue why I bought the GT. But now while I have it I want to go all out.
If I had to do over I would got a Darkhorse.. I;m even thinking of putting a Wipple on it.

 

first, welcome to the forum

is this your confirmation that it is a 2024? I guess so, but it's a little obscure ... it is important to know for sure what car we are talking about, because they are different

if aftermarket tuning is not an option, I would think that a Ford dealer should be able to adjust it for you

 

Ok Thanks! I missed that, and you are right... Thanks for fixing my mistake!