help on calibrating speed odometer - Ford Powerstroke Diesel Forum
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post #1 of 15 Old 01-04-2008, 01:10 PM Thread Starter
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help on calibrating speed odometer

just bought a new to me 6.0 it has 37" tires speed odo is about 12mph off what do i need to do ??????
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post #2 of 15 Old 01-04-2008, 01:30 PM
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i also have 37'' tires, i am only off about 5 MPH. have you had someone follow you and check the speed??

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post #3 of 15 Old 01-04-2008, 01:33 PM
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superlift truspeed it lets you recalibrate for tires and gear changes $175

traded it for an 06 dodge sorry
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post #4 of 15 Old 01-04-2008, 02:03 PM
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+1 for truspeed. Perfect box for an 06
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post #5 of 15 Old 01-23-2008, 06:12 PM
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where are you guys getting prices shipped for 175?

Theres other boxes out there too...

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post #6 of 15 Old 01-23-2008, 06:15 PM
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Superchips Tirepaq (expensive) or a Accupro: Accu Pro Speedometer and Odometer Calibrator

-Evan

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post #7 of 15 Old 01-23-2008, 06:19 PM
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problem with accupro =

Tire Sizes = 24in. - 34in.

BLEH... i have 37's plus i spent less on the box I use

Speed Wizard, kind of like a tru speeed but less expensive, smaller, and can be calibrated while parked (shows a user interface through the speedometer)

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post #8 of 15 Old 01-23-2008, 06:25 PM
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I've got 37's also
Speedo Says 40 I'm doin 37
................. 50............ 45
................. 60............ 55
................. 70............ 63
just had mine calibrated..I'm using my Bully Dod Outlook and it's pretty accurate

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post #9 of 15 Old 01-23-2008, 06:31 PM
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Quote:
I've got 37's also
Speedo Says 40 I'm doin 37
................. 50............ 45
................. 60............ 55
................. 70............ 63
just had mine calibrated..I'm using my Bully Dod Outlook and it's pretty accurate
That does not look accurate at all to me (sorry just being a little sarcastic)

here is mine:

50 on GPS = 50 on speedo

75 on gps = 75 on speedo

100 on gps = 100 on speedo

And every number in between works fine too... but I did not want to type them all.

I use the Speed Wizard

Kenny
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post #10 of 15 Old 01-24-2008, 04:21 PM
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Better yet, spend the $175 on a good GPS and ignore the speedometer. That's what I do and my tires and wheels are stock.

Al

'06 F-350 SRW 6.0 PSD
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