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Old 11-17-2013, 01:34 PM   #1
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Added 35" Duratracs

Added 35" Duratracs to my '14 JKUR and my speedometer is still dead on but it seems to shift a little differently than before. Will a programmer fix the shifting? If it will, which one do I get?

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Old 11-17-2013, 01:36 PM   #2
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Procal fixed mine

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Old 11-17-2013, 02:04 PM   #3
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Any tuner or procal/Flashcal will work for you.
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Old 11-17-2013, 02:18 PM   #4
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Flashcal fanboy here. See my review. Search superchips flashcal review.
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Old 11-17-2013, 04:32 PM   #5
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Quote:
Originally Posted by Claybuster View Post
Added 35" Duratracs to my '14 JKUR and my speedometer is still dead on but it seems to shift a little differently than before. Will a programmer fix the shifting? If it will, which one do I get?
If you had factory tires before the 35"s I don't see how your speedo can be accurate.
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Old 11-17-2013, 04:35 PM   #6
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If you had factory tires before the 35"s I don't see how your speedo can be accurate.
Me either. Everything I've read said it should be off but it's dead on with the GPS.
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Old 11-17-2013, 04:38 PM   #7
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What GPS ? Your factory head unit...it reads off the speedo, so there both wrong.
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Old 11-17-2013, 04:49 PM   #8
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What GPS ? Your factory head unit...it reads off the speedo, so there both wrong.
LOL well that explains that.

I'll get the procal ordered.
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Old 11-18-2013, 05:56 AM   #9
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Yeah procal will fix
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Old 11-18-2013, 06:07 AM   #10
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I ordered the flashcal this morning.

I used my phone to check the mph and with the jeep spedo at 60 the phone said 64.5
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Old 11-18-2013, 06:37 AM   #11
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What GPS ? Your factory head unit...it reads off the speedo, so there both wrong.
Wow, never heard of a gps navigation system indicitating speed from the speedometer, instead of , oh, gps signals. Why on earth did they design it that way I wonder? Factory speedometers are not known for accuracy.
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Old 11-18-2013, 08:41 AM   #12
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How do you know it's "dead on?" You need to get the jeep up to about 65-75 to see the real error. Doing 10mph wont give you enough error to notice.
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Old 11-18-2013, 09:24 AM   #13
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Wow, never heard of a gps navigation system indicitating speed from the speedometer, instead of , oh, gps signals. Why on earth did they design it that way I wonder? Factory speedometers are not known for accuracy.
Because they didn't want to deal with the legions of people who would bring in their vehicle, complaining about the difference between the GPS display and the speedometer.
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Old 11-18-2013, 02:37 PM   #14
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Any tuner or procal/Flashcal will work for you.

Will the flashcal work on a 2014 yet?
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Old 11-18-2013, 06:29 PM   #15
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Will the flashcal work on a 2014 yet?
Yes
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Old 11-19-2013, 12:42 PM   #16
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Just get a GPS app. for your phone...they are real accurate!
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Old 11-19-2013, 06:17 PM   #17
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If you had factory tires before the 35"s I don't see how your speedo can be accurate.
It's not correct. Procal or other will reprogram everything.
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Old 11-20-2013, 06:52 AM   #18
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How much are 35" duratracs each?
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Old 11-20-2013, 10:36 AM   #19
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Depends on your wheel size but should be around $270 to $300 a piece.. I paid $280 per tire in 315/75R16 size.
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Old 11-20-2013, 03:57 PM   #20
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Yes
No! not without an update and since I cannot get their POS software to install on any of two PC's and a laptop I cannot update it. It's going back and I'll order the procal like I should have in the first place.
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Old 11-23-2013, 05:41 PM   #21
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I went from 29" sport model to 35" duratracks. I think AEV ProCal is a must have. You will need to measure your tire from edge to edge and it should be around 33.75 when mounted. Very easy to use.
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Old 11-23-2013, 06:38 PM   #22
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No! not without an update and since I cannot get their POS software to install on any of two PC's and a laptop I cannot update it. It's going back and I'll order the procal like I should have in the first place.
I apologize, and am sorry it did not work for you. I was aware it needed an update for the 14's but what operating system are you using? I have windows 7 and did not have a problem updating. Granted i have a 13 but needed to download an update to be able to bring the tpms to zero. If you have not returned it you can pm me and i can guide you through it if youd like.
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Old 11-23-2013, 06:46 PM   #23
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If you measure you tire edge to edge, you will be a 1/2" off. Measure it the right way, ground to center of centercap, multiply by two. On the first try, I had 100% match up to 80mph, gps verified with 3 devices.

Before I knew about the correct method, I did the edge to edge method...was 2mph off at 65 (65 on the dash was actually 63 gps verified), which rolls your odometer faster for no reason.
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Old 11-24-2013, 07:10 AM   #24
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I apologize, and am sorry it did not work for you. I was aware it needed an update for the 14's but what operating system are you using? I have windows 7 and did not have a problem updating. Granted i have a 13 but needed to download an update to be able to bring the tpms to zero. If you have not returned it you can pm me and i can guide you through it if youd like.
No worries, I got it to work by reloading my PC I guess I had something on there it didn't like.
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Old 11-24-2013, 09:44 AM   #25
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If you measure you tire edge to edge, you will be a 1/2" off. Measure it the right way, ground to center of centercap, multiply by two. On the first try, I had 100% match up to 80mph, gps verified with 3 devices.

Before I knew about the correct method, I did the edge to edge method...was 2mph off at 65 (65 on the dash was actually 63 gps verified), which rolls your odometer faster for no reason.
I just put my duratracs on, I measured top of the tire to the ground. I used a level. I was closest at 33.75.
I just measured ground to the center cap, 16 .25... so 32.5.
I guess I need to re-flash.
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Old 11-24-2013, 10:53 AM   #26
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Weird, i measured from the ground to the top of the tire as per superchips and im spot on on the freeway.
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Old 11-24-2013, 11:04 AM   #27
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Measured from ground to top edge on all four tires and then took the average. I am exact with Garmin handheld GPS and speedo both freeway and city driving. For best pricing contact the vendors here.....
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Old 11-25-2013, 01:45 PM   #28
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I emailed AEV and asked them what is the correct measurement to use for the Procal.
Their response:

The best way is to use a level and measure from the top of the tire to the ground. You want the true height of the tire with the jeeps weight on it.
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Old 11-25-2013, 02:43 PM   #29
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with my 315/75/16 duratracs- mine came out to about 33.75 and that is what i put in my pro cal and it is dead on with my gps on both my phone and external gps unit, as well as the little police speed limit signs on the side of the road. I run 28 psi in all 4 tires..
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Old 11-26-2013, 10:16 PM   #30
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^ mine too, same measurement

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