new tire size now how to fix the spedo

kingjeep · **Posted:** Tue Aug 04, 2009 2:38 pm

ok i got my 31" on is it posible to ajust the spedo im only 4% off and i use my gps but if posible i would like to fix my speedo

ATXKJ · **Posted:** Tue Aug 04, 2009 7:18 pm

if you can find the right dealership - their computer can talk to your computer -(I think the Body computer - not sure)
and do a pinion reset with the correct revolutions / mile for the new tires (the manufacturer lists it)

I've tried a couple of dealerships and they say they can't do it - but other people have had it done - for anywhere from free to a 1/2 hour labor charge.

Cobalt-60 · **Posted:** Tue Aug 04, 2009 8:25 pm

Do a search here for the term "Pinion Index Reset"...

kingjeep · **Posted:** Tue Aug 04, 2009 9:39 pm

ATXKJ wrote:

if you can find the right dealership - their computer can talk to your computer -(I think the Body computer - not sure)
and do a pinion reset with the correct revolutions / mile for the new tires (the manufacturer lists it)

I've tried a couple of dealerships and they say they can't do it - but other people have had it done - for anywhere from free to a 1/2 hour labor charge.

they attempted to today some of the jk guys have this little computer thing can i get that for my kj its like $200 and will help you with a lot of stuff even impove gass milsage

2006 KJ · **Posted:** Tue Aug 04, 2009 9:58 pm

when i put on my 32's they corrected my speedo haha.. it is perfect with my GPS untill about 60 and over then it is off 1-2 mph

Murphyman · **Posted:** Tue Aug 04, 2009 10:49 pm

I like my speedo the way it is...

new tire size now how to fix the spedo

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