Tune with gears ???

[samsonhusky]

I’m about to put 4.10 gears in my 96 gt with automatic trans. Was wondering if a tube is required or not ?

 

[white95]

No. You’ll need to find a “Speed Cal” to correctly reset the speedometer. If you can’t find one, I may still have one laying around.

https://www.americanmuscle.com/speed-cal-install.html

 

[RAU03MACH]

https://www.googleadservices.com/pa...wj4t_Oaht3pAhXCGM0KHULRAW8Qwg96BAgJECY&adurl=
I have used these to calibrate my speedomiter
After a gear swap

 

[BigBore96]

For 4.10s in that auto to do the plastic gear speedo correction you must change both the gears.



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[RAU03MACH]

For 4.10s in that auto to do the plastic gear speedo correction you must change both the gears.



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The both of them would need to be changed

 

[PinkieT]

Anybody know which gear I would need for a 3.73 rear in my 98 5-speed?

 

[RAU03MACH]

I used that brown looking one and was off buy 1 mile per hour

 

[samsonhusky]

Thanks for all the replies

 

[samsonhusky]

Double checking on the recalibration tool being needed. I’ve read in couple other places on line that on 99 and up you need it. But on 98 and down automaticS you can just do the plastic gear swap. So are we sure i need a recalibration for a 96 ?

 

[samsonhusky]

I also see steeda has this but not for 99 and newer

Mustang Speedometer Recalibration Gear - Automatic - 8 Tooth 4.10 Ratio 23 Speedo (83-98)

 

[RAU03MACH]

I also see steeda has this but not for 99 and newer

Mustang Speedometer Recalibration Gear - Automatic - 8 Tooth 4.10 Ratio 23 Speedo (83-98)

Not sure about 99 up
You might need something like white suggesting

 

[BigBore96]

The 96 to 98 GTs got an 8 tooth drive gear which didnt leave it with much options for swapping the speedo gear. The cobras got a 7 tooth which allowed more options.

You can do the speedcal route or you can swap the speedo drive gear (inside the tail) and a speedo gear.

Speedcal is more expensive but least amount of work if you're mediocre or better at wiring.

From my experience with the speedcal I would get the Dallas if it's still available. The other ones I've used would have an occasional millisecond drop in signal and make cruise control uncomfortable.

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[samsonhusky]

I Called steeda they saying just change out the one gear it’s going to work. Guess I will find out. This is the one I’m getting. Hopefully it’s that simple


https://www.steeda.com/mustang-speedo-gear-392-ste-17271-j.html