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Old 08-10-2013, 11:56 PM   #1
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Odometer recalibration after lift and 35's installed

So I am not to mechanically inclined to start with and just learning some of the technical stuff involved with having a lifted rubicon. I bought a used rubicon that had a 4" lift with 35's installed just prior to me purchasing the vehicle. The dealership sent me an odometer calibrator and basically left me to my own devises. Can i screw things up badly if I do it wrong and/or should I not risk the possibility and have someone do it for me? What is the typical stock tire size on a 2013 rubicon? Is it necessary to do ( I am sure the answer is yes unless I don't want speeding tickets).

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Old 08-11-2013, 12:13 AM   #2
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What type is the calibrator? I used the AEV Procal on mine. It came with instructions on how to do it. It was easy. Did yours come with instructions?

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Old 08-11-2013, 12:48 AM   #3
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I would do it. Did mine a week ago with AEV Procal and i'm happy. It fixed all the readings and shows that my mpg has gone from 13 to 16 mpg. I think its a must have especially for auto tranny.
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Old 08-11-2013, 02:00 AM   #4
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So you mean to tell me that a dealership sold you a modified Jeep, but didn't bother to calibrate the computer to the tires on the vehicle? I'd seriously consider choosing a different dealership for service.

If they sent you out the door with a AEV Procal, you should be OK programming it yourself. Measure from the center of the wheel to the ground and multiply that by two. That will give you the rolling diameter. Read the instructions on the Procal, set the switches, verify they are set correctly, and follow the instructions for programming.
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Old 08-11-2013, 09:35 AM   #5
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They sent me a Hypertech calibrator. It did come with instructions and a video. I know it isn't rocket science, but in watching the video that comes with it, it warns if you screw this up serious consequences and expense at a dealership. Thanks for the advice. I bought this from a ford dealership in ATL ( I live in Chicago), they did the mods and did not do the calibration. Sucks but oh well good learning experience.

Reading some old post on the matter it sounds like I should just chunk the Hypertech and go with the AEV procal.
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Old 08-11-2013, 09:40 AM   #6
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I've never used the Hypertech. With the Procal you can change it easy and change it back to stock again easy. I don't think you can screw it up. Even if you had the switches in the wrong place you would just do it over. The Procal toots the horn twice to let you know it worked.
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Old 08-11-2013, 09:50 AM   #7
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Dont worry too much its not that complicated no matter which brand you have. As mentioned measure your tire for most if not all 35s are not true.

I believe the ones that screws it up are the ones that messes with the rpm and shift points.
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Old 08-11-2013, 10:52 AM   #8
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Dealership Calibration

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Originally Posted by Vin View Post
So you mean to tell me that a dealership sold you a modified Jeep, but didn't bother to calibrate the computer to the tires on the vehicle? I'd seriously consider choosing a different dealership for service.
My buddy is the parts manager at a Jeep Dealership. He told me they can lift and put bigger tires on your Jeep, but they can only calibrate up to 285 tires, legally due to Federal Guidelines (mileage and all). He also said their computers that allow them to program the ODBC II computer only allow up to 285's. If they could go higher, they would have to buy a ProCal or FlashCal (like us) to do it as well and would have to charge you for the tool since the tool only works for that Jeep.

Also, the AEV ProCal doesn't work yet for 2012 and 2013, just FYI.
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Old 08-11-2013, 11:01 AM   #9
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Quote:
Originally Posted by ahsumtoy View Post
My buddy is the parts manager at a Jeep Dealership. He told me they can lift and put bigger tires on your Jeep, but they can only calibrate up to 285 tires, legally due to Federal Guidelines (mileage and all). He also said their computers that allow them to program the ODBC II computer only allow up to 285's. If they could go higher, they would have to buy a ProCal or FlashCal (like us) to do it as well and would have to charge you for the tool since the tool only works for that Jeep.
That works for me. Selling a vehicle with 35s, with the speedo and odo set for 32s is like Mcdonalds selling you the ingredients for a big mac and having you build the burger yourself. Not only will the auto tranny not shift at the right time, but the odi will show less miles than acrually run. If American Corporations keep doing things half ass, We'll end up with quality control problems like oversea business.


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Old 08-11-2013, 11:29 AM   #10
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Originally Posted by ahsumtoy View Post
Also, the AEV ProCal doesn't work yet for 2012 and 2013, just FYI.
According to guys on the AEV forum it's working.

Also, AEV just posted on August 6th that all their stuff is compatible with the 2014: 2014 Part Compatibility - American Expedition Vehicles - Product Forums
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Old 08-11-2013, 11:37 AM   #11
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Ford used car MGR that concocted this mod etc. they did a nice job pro comp 4" lift, nitto 35 x 12.5 tires ...Rides great but haven't yet gotten out to the sticks as I have only had it a week.

So AEV procal won't work on my 2013?
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Old 08-11-2013, 11:37 AM   #12
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I have had the procal on my 13 for 3 montths. Pretty sure they have that fixed.
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Old 08-11-2013, 11:39 AM   #13
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Thanks Matt didn't see your reply before I posted.
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Old 08-11-2013, 11:43 AM   #14
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Thanks Matt didn't see your reply before I posted.
No problem. Get it done soon. I don't have first hand experience but from what I gather having that large a lift without calibration can mess with the ESC system and reduce safety.
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Old 08-11-2013, 01:32 PM   #15
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Good to know

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According to guys on the AEV forum it's working.

Also, AEV just posted on August 6th that all their stuff is compatible with the 2014: 2014 Part Compatibility - American Expedition Vehicles - Product Forums
That's great. Most of their ads still say from 2011 down.
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Old 08-11-2013, 02:36 PM   #16
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I just lifted and install 35's. I ordered a Procal and on the box it said 2013 ready!! It took all of 5 minutes to do the correction.

I used a yard stick and a level. With the air pressure set and tires on the Jeep I did it like this.. Yard stick vertical against the tire. Level on top of the tire, where the yard stick and level meet that's how tall your tire really is. Just make sure your level is "level"..

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Old 08-11-2013, 02:38 PM   #17
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Quote:
Originally Posted by Kitebeach View Post
Ford used car MGR that concocted this mod etc. they did a nice job pro comp 4" lift, nitto 35 x 12.5 tires ...Rides great but haven't yet gotten out to the sticks as I have only had it a week.

So AEV procal won't work on my 2013?
AEV Procal will 100% work for 2013. Mine is 2013 and it worked fine.
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Old 08-11-2013, 03:37 PM   #18
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Mine is a 2013 and the Procal worked fine on it too.

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