Procal programmer
JK Junkie
Joined: Apr 2012
Posts: 2,552
Likes: 0
From: Huntsville, TX
I'm interested in ordering a procal programmer for my 13 jk unlimited an woundering if it worth the money an dose it really make a difference on the shift point for the automatic with 3.21 gears an 33" duratracs I know it will correct the speedo but woundering bout the shift points thanks
JK Jedi
Joined: Sep 2012
Posts: 4,364
Likes: 107
From: missoula,mt
I have a 2013 with 33's (285/75-16 toyo at 2's ) I used the procal to recalibrate my speedo (both speed and odometer are spot on). I have auto and 3.21's and I have what I consider perfect auto shifting. I have read on forums so many times how the 3.21's and 33" tires suck and are always hunting for the proper gears. I just returned from a 2500 mile trip to Moab and back and was fully loaded down and never had an issue and between here and there are many long hills and elevation gains etc. I drove at least the speed limit or just above (speed limit for the majority of the trip was 75mph and I drove between 75-80mph) and my tranny rarely hunted for gears. It stayed mostly in 5th gear except on the return when I thru Idaho and then into Montana I had a very strong headwind combined with Monita pass. It would shift down to 4th and sometimes to 3rd to maintain 75-80mph. I guess my point is I think it is important to have your speedo calibrated so you get proper shift points.
JK Jedi Master
Joined: Jan 2008
Posts: 11,463
Likes: 165
From: Austin <--> Colorado Springs
It shows you where the computer thinks center is by turning on the turn signals. You will be kneeling in front of your jeep turning the turnbuckle on the drag link, and you will see turn signal showing you a direction. Keep turning until both lights are on.
Using just the steering wheel as a guide isn't as accurate.
Using just the steering wheel as a guide isn't as accurate.
Thread Starter
JK Newbie
Joined: Jun 2013
Posts: 4
Likes: 0
From: Surprise arizona
Ok guys I got my programmer in the mail yesterday reprogram my ecu for my 33" tires an man did it make a world of difference my speedo is accurate now shift points change went for a 150 mile run my gas mileage improved from 16 to 18 in the city and was running 70 to 75 on freeway an was averaging 21 to 22 depending on my right foot I would defiantly recommend this product even just if you are changing tires to bigger than stock
JK Jedi
Joined: Sep 2012
Posts: 4,364
Likes: 107
From: missoula,mt
I would be upset if I only got 15mpg while doing 70-75mph. I just returned from Moab and coming home driving 75-80mph in a stiff head wind I got over 16.5mpg. I get at least 15mpg even when wheeling. Maybe you need to get your rpms up above 2K. My jeep computer is all over the place for mpg and I hand figure every tank. Some times the computer shows less mpg then actual and sometimes more.
JK Newbie
Joined: Jun 2013
Posts: 88
Likes: 0
From: Eastland TX
I travel 370 mile round trip every week doing 73mph on interstate in central tx. For tge most part its flat, but a steep hills. Its constantly downshifting on these hills. Im hoping a regear from the stock 3.21 will help. Im just trying to decide 4.10 with current tires or 4.56 with 35's?
JK Enthusiast
Joined: Jun 2013
Posts: 377
Likes: 0
From: North Texas
I would be upset if I only got 15mpg while doing 70-75mph. I just returned from Moab and coming home driving 75-80mph in a stiff head wind I got over 16.5mpg. I get at least 15mpg even when wheeling. Maybe you need to get your rpms up above 2K. My jeep computer is all over the place for mpg and I hand figure every tank. Some times the computer shows less mpg then actual and sometimes more.