Gears

[SVTIM]

Went to 3.73 gears. Changed the speedometer gear but am still about 10% off. How did you all out there address this:confused:

[PowerCobra98]

You must have put in the wrong speedo gear.
You need Steeda's part number 375-C4OZ-17271-A. It is the red gear. Costs $9.95.
If your rear tires aren't stock diameter that will also affect your speedo.

[F8Z-SVT]

With stock 245/45-ZR17 tires a 21 tooth speedo gear should get you very close to spot on accuracy.

[gcassidy]

I had an Abbot Electronic Ratio Adjuster installed with my 3.90s. Can adjust it if I change gearing. But my speedo gyrates wildly above 110 (on the track). Haven't descovered if it's the ERA or bad speedo head.
Greg

Torque? We don't need no steenkin torque!

[greensnake97]

Went to 3.73 gears. Changed the speedometer gear but am still about 10% off. How did you all out there address this:confused:

Got my red 21 tooth gear from my local Ford dealer - $8...

I'm gonna do a little road trip with my GPS to find out how accurate the 21 tooth is with the 3.73's. That's the one that Ford says is required.

Scott

[hersheyman]

Doesn't Dallas Mustang sell a tuner specifically for this for 96+ Mustangs? I believe I saw it on their site for $99.