Lets talk Speedo Correction!?
10-01-2007, 01:28 PM
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JK Freak
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Lets talk Speedo Correction!?
ok is there anyway besides the dealer flash for 32" tires to correct the speedo for bigger tires 33-37 etc?? I heard someone used a procomp programmer and it worked, but I dunno how true that is?
10-01-2007, 01:41 PM
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Your dealership can only flash your computer up to 32" tires. Beyond that, they will not be able to help you out. I have just used the ProComp Accu Pro on my JK and will do some testing against my GPS in a few minutes. I will post my results shortly 
10-01-2007, 01:50 PM
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10-01-2007, 03:06 PM
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Well son of a gun - this thing actually WORKED!!!! 
Seriously, using the Pro Comp Accu Pro, I was able to set a specific tire size down to a 1/4" (my worn down 315/70R17 measuered up to 33.5") and set the gear ratio to 5.13's which is what I have on now. And, after doing a series of tests and checking it against my GPS, I can tell you that my speedometer is actually reading dead on now. Need I say, if you're looking to get your speedo calibrated to match your new bigger tires, this thing will do the trick.
I will try to get a more thorough write-up on how to use this thing as soon as I can.
Seriously, using the Pro Comp Accu Pro, I was able to set a specific tire size down to a 1/4" (my worn down 315/70R17 measuered up to 33.5") and set the gear ratio to 5.13's which is what I have on now. And, after doing a series of tests and checking it against my GPS, I can tell you that my speedometer is actually reading dead on now. Need I say, if you're looking to get your speedo calibrated to match your new bigger tires, this thing will do the trick.
I will try to get a more thorough write-up on how to use this thing as soon as I can.
10-01-2007, 03:17 PM
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Sort of a thread jack, and you can delete if necessary, but I was wondering if the computer speedo is set to optional equipment, a base number for all, or if it comes programed accordingly to x/saraha/rubicon?
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10-01-2007, 03:26 PM
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Well son of a gun - this thing actually WORKED!!!!
Seriously, using the Pro Comp Accu Pro, I was able to set a specific tire size down to a 1/4" (my worn down 315/70R17 measuered up to 33.5") and set the gear ratio to 5.13's which is what I have on now. And, after doing a series of tests and checking it against my GPS, I can tell you that my speedometer is actually reading dead on now. Need I say, if you're looking to get your speedo calibrated to match your new bigger tires, this thing will do the trick.
I will try to get a more thorough write-up on how to use this thing as soon as I can.
Seriously, using the Pro Comp Accu Pro, I was able to set a specific tire size down to a 1/4" (my worn down 315/70R17 measuered up to 33.5") and set the gear ratio to 5.13's which is what I have on now. And, after doing a series of tests and checking it against my GPS, I can tell you that my speedometer is actually reading dead on now. Need I say, if you're looking to get your speedo calibrated to match your new bigger tires, this thing will do the trick.
I will try to get a more thorough write-up on how to use this thing as soon as I can.
WOL, who's selling the Pro Comp Accu Pros? Thx.
10-01-2007, 03:33 PM
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