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Gear Change & Speedo Calibration


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I had 4:10 gears installed this week. For those of you that have done this what do you recommend as the best way to recalibrate the speedometer? The dealer couldn't change mine because of the Shelby tune, which i figured would be a problem. I see where American Muscle sells a speedometer recalibration tool, but I'm wondering if I shouldn't just get a tuner and do it that way. See links below. Opinions and advice is appreciated.

Dave

http://www.americanmuscle.com/ford-speedo-tool-9410.html

http://www.americanmuscle.com/x3-custom-tuner-0510gt.html

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I've haven't used that speedo calib. tool. I'm not sure if it would step on your current tune. However, I would recommend getting a SCT tuner fromt Brenspeed. John at Brenspeed can give you a tuner and tune that will help pick up some more power as well as give you the ability to adjust your gear ratio whenever you like.

 

http://www.brenspeed.com/3000a.html

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I've haven't used that speedo calib. tool. I'm not sure if it would step on your current tune. However, I would recommend getting a SCT tuner fromt Brenspeed. John at Brenspeed can give you a tuner and tune that will help pick up some more power as well as give you the ability to adjust your gear ratio whenever you like.

 

http://www.brenspeed.com/3000a.html

What about VMP Tuning? I've heard good things about Justin.

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I have the SCT Tuner (Ver 2) from a few years ago... Purchased from Brenspeed with 3x tunes (87 Street, 92 Street + 92 Track)...

 

Not a bad purchase, as it also allows for you to change lots of little things (ratios, rev + speed limiters, timing, etc)...

 

Also makes the car a lot more driveable, with the HP/TQ curves a lot smoother... No real gains in either, but you will notice the improved "feel" of the car when you drive it :shift:

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I had 4:10 gears installed this week. For those of you that have done this what do you recommend as the best way to recalibrate the speedometer? The dealer couldn't change mine because of the Shelby tune, which i figured would be a problem. I see where American Muscle sells a speedometer recalibration tool, but I'm wondering if I shouldn't just get a tuner and do it that way. See links below. Opinions and advice is appreciated.

Dave

http://www.americanmuscle.com/ford-speedo-tool-9410.html

http://www.americanmuscle.com/x3-custom-tuner-0510gt.html

 

I went with the 4.10s recently and struggled with the same decision. I finally went with Bama Tunes (now American Muscle). I researched this thread extensively and both Bama and Brenspeed were highly recommended but it seemed like Bama had a slight edge in product satisfaction. I got 3, 91 octane tunes, a street, performance and race. I started with the street tune, drove it for a couple of weeks, did the same with the performance tune and now am driving the race tune. All tunes feel way different than stock. The only negative I have experienced is with the street tune. Sometimes on slow takeoffs, my car would lurch or jerk unnaturally. Mostly happened when it was cold but it was really disconcerting, especially for passengers. No problems at all with hard launches. This annoyance is not really noticable on the street and race tunes. I definitely feel that it was money well spent. It was worth it just to fix the speedo and the tunes are a bonus.

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Dave,

If you haven't made the speedo change before leaving for Shelbyfest just be cautious when driving so you don't get a ticket on the way.

Don

 

Hi Don,

yeah, don't want any tickets coming down. I'll probably plug in the GPS and monitor my speed that way. I have to say it does wake the car up some. I haven't really noticed that big of a difference in the drivabilty of the car, quicker shift points of course, but now 5th gear is actually usable.

Edited by IASHELBYGT
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