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Unread 03-29-2015, 08:21 PM   #1
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
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.
1991 XJ -> 2007 WK
Silver WK Club Member #135
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Unread 03-30-2015, 11:08 AM   #3
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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
There are the wolves, there are the sheep, but then, there are the Sheepdog's
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