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Unread 03-29-2015, 08:21 PM   #1
alec_elliott_19
Registered User
2005 WK 
 
Join Date: Dec 2014
Location: Bear, Delaware
Posts: 30
Speedo Recalc

Tomorrow I am getting mud terrains fitted on my 05 WK 4.7L. I have the stock orbiteck cast aluminum rims, and i currently have 235/65/17 tires. The mud terrains are 255/75/17. This difference will cause it to be 10% on the speedometer (shows 50, actually 55). I know there is a hypertech speedometer calibrator, although I dont really want to spend 200 dollars on it. Ive been told a shop couldnt do it because 32s arent a size that is offered stock. Any ideas?

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Unread 03-29-2015, 10:22 PM   #2
glettow
Registered User
2007 WK 
 
Join Date: Jul 2014
Location: Leawood, Kansas
Posts: 57
Tuner is the only option out there as far as I know. I started with a hypertech just to calibrate my speedometer but ended up with a superchips flashpaq. I have the 4.7 and am pleased with some of the other uses for the tuner. I like the 87 octane tune and the TPMS chime delete was a real sanity saver. Also being able to check and clear DTCs is handy. All in all it was worth the price.
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Unread 03-30-2015, 11:08 AM   #3
sheepdog918
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2007 WK 
 
Join Date: May 2014
Location: Russell springs, Ky
Posts: 229
Find you a good used superchips, plenty of people on here or on eBay. Many good uses for the 4.7
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