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» Northern California Ford Owners     » Automotive   » Tech Talk   » speedometer problem

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Author Topic: speedometer problem
95gts
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I have a 1997 gt that I recently purchased which was all stock at the time. The problem is that the speedometer reads too high. If my speedometer is showing 80 I am actually going 70. I assume the gears are stock since the rest of the car was untouched and i am now running 245/40/18 and 285/35/18 rear tires which should be close enough to stock. I am guessing the speedometer is ok since it works. Any one else have a problem similar to this and if so what was the solution...? Could the speed sensor on the tranny be bad?

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supercharged 1995 gts, 2015 gt

Posts: 16 | From: pittsburg, ca | Registered: Nov 2007  |  :
30Tunes
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you got bigger rims??? that could be it??
i have the same problem but it says 70 and im goin 80 haha

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SUCCESS ONLY COMES BEFORE WORK IN THE DICTIONARY

1991 Calypso Green Notch
1993 Cobra Clone - SOLD

Posts: 829 | From: Bay Area | Registered: Dec 2007  |  :
95gts
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i forgot to mention that i had this problem before changing the wheels. the problem was there with the stock 17" gt wheels

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supercharged 1995 gts, 2015 gt

Posts: 16 | From: pittsburg, ca | Registered: Nov 2007  |  :
Thirteen Twenty
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That tire is approx. 2/10ths of an inch taller so your speedo if anything should read slower. If it's anything better than a pusstang it will have trak-lok, jack it up and check the gear ratio for sure, I used to have something called an abbot box which can be used to adjust the speedo.
Posts: 647 | From: union city | Registered: Oct 2007  |  :


 
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