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Old 01-30-2011, 08:25 PM   #1
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What do you guys think about the AEV ProCAL Module?

I'm still doing my research as of everything I will need to do after going to bigger tires. So it includes a lift, probably spacers, and re-gearing to try to maintain my MPG almost as stock.

While looking at some lift spacers I found the AEV ProCAL Module. It claims to do a lot of things, specially, reprogram the jeep so that it can make better use of the bigger tires (this is my own word short explanation of it).

So, anyone has experience with this. Is this really worth it?

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Old 01-30-2011, 10:17 PM   #2
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The AEV Procal does a fine job if all you want to do is make simple changes like tire size. The Superchips Flashpaq is another but it cost twice as much but it does everthing that AEV does plus it does tuning updates to help with the gas mileage reduction caused by the bigger tires. I figure at the 2 mpg it got me it will take 14 months to pay for it or 7 months to make upo for not buying the AEV.

Either will work to change tire size. With either you will need to take into account the compression of the tires with weight. Even though my bigger tires were 32.71 inches I had to set tire size to 32" to get speedo to adjust to correct speed. Make sure to have a gps ready so you can verify your speedo after new tires and tire size change in the computer.

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Old 01-30-2011, 10:52 PM   #3
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The AEV Procal (or Superchips flashpaq) are pretty much necessary on a JK if you want accurate speedometer readings. Just hold a level across the top of the tire and measure the tires actual height with the Jeep's weight on the tire. My 37" ProComps were 36.0" tall. The Procal also let me program in the correct gear ratio (5.38:1), which when combined with accurate speedometer readings allows the auto transmission to have proper shift points. The Procal also let me completely turn off the TPMS, which is great.

I did not want to change engine timing, so chose not to go with the more expensive Superchips module.
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Old 01-31-2011, 08:58 AM   #4
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I've had total success with the AEVPM and for $149 bucks it's well worthit for lift/tires/speedo/TPMS Disable/axle ratio chg for tranny/etc

I have no trouble with mileage and my tranny shifts OK now--

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Old 01-31-2011, 09:10 AM   #5
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Thank you guys!!! I was a little afraid of buying and wasting my money. Actually, a friend and me are getting new tires and I'm pretty sure he does not know anything about gear ratios and lift and losing mpg if the JK is not adjusted. I will ask him so wen put the money together and buy it.

thank you for your help
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Old 01-31-2011, 09:22 AM   #6
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Originally Posted by makotoshishio View Post
I will ask him so wen put the money together and buy it.
WHOA, careful. As I recall, most of these programmers won't allow you to use them on two vehicles. They'll let you make changes to one vehicle, but require that you set that vehicle back to "stock" before you can make changes on another. Someone else will have to confirm, but I'm pretty sure that's how they work.
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Old 01-31-2011, 09:38 AM   #7
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---YUP-The AEVPM "embeds" the first vehicle use VIN, in it's memory and to useit in another vehicle--

The first vehicle has to "RESTORE" all the ECU functions, back to factory and that negates all that you've done to modify yours--

The only time the AEVPM should be resused in another-is after you've sold yours or want to go back in time to factory--

Good luck

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Old 02-01-2011, 08:09 AM   #8
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Good to know! thank you guys, you just saved us from making a mess!!!
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Old 12-28-2012, 09:55 PM   #9
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Is this info still accurate for 2012+ JK models? I just added bigger tires today and then visited my dealer for a reprogram. Regarding the transmission, I was advised nothing was needed. They also did not have my tire size in "the system" for a speedometer update. It's only 1.33 Mph difference, so I accomplished nothing.
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Old 12-28-2012, 10:14 PM   #10
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Yes, the Procal has been updated for the 2012/13 JKs.
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Old 12-28-2012, 10:43 PM   #11
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Thanks. Any idea why my dealer's service techs know nothing about this?

Should I be concerned about this? I changed from factory 255/70/18 to 285/70/17 on a 2012 Sahara.
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Old 12-29-2012, 09:53 AM   #12
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The ProCal is a wise investment. I'm glad I bought one!
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Old 12-29-2012, 10:09 AM   #13
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Thanks. Any idea why my dealer's service techs know nothing about this?

Should I be concerned about this? I changed from factory 255/70/18 to 285/70/17 on a 2012 Sahara.

dealer techs do not always know about a lot of aftermarket stuff. Many dealer techs are not actaul jeep enthusiasts and are only trained in factroy equipment. I would not be concerned as there is only about 1% difference in speedo readings between the two.
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Old 12-29-2012, 11:01 AM   #14
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Originally Posted by jadmt

dealer techs do not always know about a lot of aftermarket stuff. Many dealer techs are not actaul jeep enthusiasts and are only trained in factroy equipment. I would not be concerned as there is only about 1% difference in speedo readings between the two.
I purposely planned my tire change size via Discount Tire's "tire calculator" to ensure a minimal speedometer difference of 1.33 mph, so I was aware of this fact and therefore I'm not concerned. However, it's all the talk about "shift points" that worries me about my auto transmission. I was not aware of these potential issues, so naturally, I fear them. I guess I need to know whether we're talking about "improving" performance with new purchases (flashpaq / procalor) or causing actual harm to my Jeep by doing nothing. Right now, improvement is secondary to potentially phantom fears.
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Old 12-29-2012, 11:12 AM   #15
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Thanks. Any idea why my dealer's service techs know nothing about this?
A dealer tech's goal is to repair vehicles to run at factory specifications and standards. They spend a lot of time keeping up with all the latest service bulletins and specialty information from Chrysler.

Even if a Jeep tech is a performance enthusiast, there is no guarantee that they own and drive a Jeep, much less keep up on all the new SEMA products for the Wrangler that hit the market every year.
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Old 12-29-2012, 11:12 AM   #16
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shift points come in to play when there is more of a difference in tire diameter. with the minimal difference in tire size you have there will not be any issues.
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Old 12-29-2012, 11:26 AM   #17
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shift points come in to play when there is more of a difference in tire diameter. with the minimal difference in tire size you have there will not be any issues.
Thanks for your helpful comments. Music to my....uh....eyes?

So now that my mission of "Do No Harm" to my investment has been satisfied, do y'all recommend the performance improvement option or will the difference be too minimal to justify the effort?

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