Gear ratio change
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Joined: December 25, 2022
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Gear ratio change
Merry Christmas to everyone!
I just got 3.55s for Christmas for my 14’ 3.7 and wanted to know if I needed a tune for my car to run correctly or can I just get my speedometer recalibrated? I already know that my speedometer will be off but other than that will the car run fine?
I just got 3.55s for Christmas for my 14’ 3.7 and wanted to know if I needed a tune for my car to run correctly or can I just get my speedometer recalibrated? I already know that my speedometer will be off but other than that will the car run fine?
Administrator clevparts@aol.com
Joined: November 27, 2004
Posts: 12,564
Likes: 4,317
From: Visalia Ca.
Merry Christmas to everyone!
I just got 3.55s for Christmas for my 14’ 3.7 and wanted to know if I needed a tune for my car to run correctly or can I just get my speedometer recalibrated? I already know that my speedometer will be off but other than that will the car run fine?
I just got 3.55s for Christmas for my 14’ 3.7 and wanted to know if I needed a tune for my car to run correctly or can I just get my speedometer recalibrated? I already know that my speedometer will be off but other than that will the car run fine?
Welcome to TMS!
KC
https://themustangsource.com/forums/...t-tune-549496/
Link
Last edited by 05stangkc; Dec 25, 2022 at 12:14 PM.
Administrator clevparts@aol.com
Joined: November 27, 2004
Posts: 12,564
Likes: 4,317
From: Visalia Ca.
I posted this in Other Topic But Please Heed this Advice!
I hope you Have a Good Rear End Specialist to do the Gearchange! They are Tough to Do Correctly! Not a Driveway Buddy Project! Ford Has Enough Problems with Noisy Rear's Out the Factory!
KC
Also Another Link!
https://themustangsource.com/forums/...s-safe-548507/
I hope you Have a Good Rear End Specialist to do the Gearchange! They are Tough to Do Correctly! Not a Driveway Buddy Project! Ford Has Enough Problems with Noisy Rear's Out the Factory!
KC
Also Another Link!
https://themustangsource.com/forums/...s-safe-548507/
Last edited by 05stangkc; Dec 25, 2022 at 04:07 PM.
Thread Starter
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Joined: December 25, 2022
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Boy Does this Sound Familiar!
Welcome to TMS!
KC
https://themustangsource.com/forums/...t-tune-549496/
Link
Welcome to TMS!
KC
https://themustangsource.com/forums/...t-tune-549496/
Link
Member
Joined: April 6, 2022
Posts: 23
Likes: 28
From: Ohio
I went from stock 3.27 to 4.56 in my 2003 crown vic cop car and it worked fine with the stock tune.
Everyone said the shift points would be way off to the point of it being undriveable even if I'd only gone with 4.10,but it worked fine with the 4.56.The shifts were just a tiny bit early,but not bad at all
3.55 will barely even affect the speedo.I doubt you'll be able to tell any difference at all in performance though.
That said,since your car is much newer than mine,the computer may have a lot more control,so my experience may not apply
Everyone said the shift points would be way off to the point of it being undriveable even if I'd only gone with 4.10,but it worked fine with the 4.56.The shifts were just a tiny bit early,but not bad at all
3.55 will barely even affect the speedo.I doubt you'll be able to tell any difference at all in performance though.
That said,since your car is much newer than mine,the computer may have a lot more control,so my experience may not apply
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