speedometer adjustment

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7/14/24 | 04:13 PM

Hothead

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Joined: July 4, 2024

Posts: 2

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speedometer adjustment

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.

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7/14/24 | 04:29 PM

shaneyusa

2014 SGM Roush Stage 2 --------- Moderator------

Joined: July 7, 2013

Posts: 2,960

Likes: 1,167

From: Idaho

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

Last edited by shaneyusa; 7/14/24 at 04:31 PM.

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7/14/24 | 04:34 PM

05stangkc

The Analog Admin!

Joined: November 27, 2004

Posts: 11,153

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From: Visalia Ca.

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

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7/14/24 | 04:49 PM

05stangkc

The Analog Admin!

Joined: November 27, 2004

Posts: 11,153

Likes: 3,328

From: Visalia Ca.

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

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7/15/24 | 07:30 AM

Hothead

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Joined: July 4, 2024

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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.

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shaneyusa (7/15/24)

7/15/24 | 07:47 AM

Bert

Legacy TMS Member

Joined: January 25, 2010

Posts: 3,875

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From: Massachusetts

Quote:

Originally Posted by Hothead

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

Last edited by Bert; 7/15/24 at 07:48 AM.