5.13 gears with Dana 30
01-09-2011, 08:26 AM
#21
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That being said, Superchips (or equivalent) is crucial with any re-gear or change in tire diameter if you have an automatic transmission. You need to correct your shift points! Even with a manual transmission, it's a good idea to have your mileage and speedo correct.
-Dawn
-Dawn
01-09-2011, 08:38 AM
#22
JK Freak
Superchips is a hand-held tuner. It's portable and plugs into your OBD port. You can buy one from Northridge 4x4 and do the tune/programming yourself. They cost around $350ish. I haven't checked prices in a while.
Anyhow, the Superchips has a lot of neat features, but specific to your situation it will allow you to adjust the Jeep's computer to reflect new gear and tire sizes. If you don't do this adjustment, your speedometer will be incorrect and your shift points (in case of an automatic) will be way off as well.
-Dawn
Anyhow, the Superchips has a lot of neat features, but specific to your situation it will allow you to adjust the Jeep's computer to reflect new gear and tire sizes. If you don't do this adjustment, your speedometer will be incorrect and your shift points (in case of an automatic) will be way off as well.
-Dawn
01-09-2011, 01:38 PM
#23
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The two most popular:
AEV ProCal - cheapest, lots of great functions, but no tuning
Superchips Flashpaq - more expensive, lots of great functions, has several tuning options
Some others to check out:
Hypertech -
Diablo -
Dealership - used to only be able to program up to 32". There have been a few posts indicating that this may have changed and they can do 35's? Might be an option if they do it for free. Definitely look into your own programmer if they charge...
01-09-2011, 02:50 PM
#25
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any time you change gears or tire size, you need to recalibrate your speedometer. in other words, yes, you will need at the very least an aev procal but, a superchips or hypertech will do more for you.
01-09-2011, 04:54 PM
#27
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Superchips is a hand-held tuner. It's portable and plugs into your OBD port. You can buy one from Northridge 4x4 and do the tune/programming yourself. They cost around $350ish. I haven't checked prices in a while.
Anyhow, the Superchips has a lot of neat features, but specific to your situation it will allow you to adjust the Jeep's computer to reflect new gear and tire sizes. If you don't do this adjustment, your speedometer will be incorrect and your shift points (in case of an automatic) will be way off as well.
-Dawn
Anyhow, the Superchips has a lot of neat features, but specific to your situation it will allow you to adjust the Jeep's computer to reflect new gear and tire sizes. If you don't do this adjustment, your speedometer will be incorrect and your shift points (in case of an automatic) will be way off as well.
-Dawn
01-09-2011, 05:45 PM
#28
JK Super Freak
I have 5.13s, and auto, and 35s. I could not be happier. When I did the upgrade from the factory 4.10s it was a noticable differance with a whole new driving feel. Not to mention the less stress on the drivetrain as whole. Got the gears from Northridge and they are great, the shop that installed them said they set up easy and were good quality. Im @ 20K miles with no problems.
I run about 2300 RPM on the interstate @ 70mph. If I drive like a grandma I get about 16.7-17 mpgs hwy, on the 91 superchip tune.
I was getting about 15mpg hwy with the 4.10s and no superchips.
I have also had no other driveline problems and wheel frequently, but I am light on the gas and take notice not to run the front axle too hard. I plan on keeping it open for now.
Here is a link that I have found very informative about the whole new gears thing....
https://www.jk-forum.com/forums/show...?82262-Gearing
good luck !
I run about 2300 RPM on the interstate @ 70mph. If I drive like a grandma I get about 16.7-17 mpgs hwy, on the 91 superchip tune.
I was getting about 15mpg hwy with the 4.10s and no superchips.
I have also had no other driveline problems and wheel frequently, but I am light on the gas and take notice not to run the front axle too hard. I plan on keeping it open for now.
Here is a link that I have found very informative about the whole new gears thing....
https://www.jk-forum.com/forums/show...?82262-Gearing
good luck !
Anyone on here have an automatic, 35's and 5.13 gears?!? I was wondering real time RPM on the highway! I don't do much freeway riding and I'm trying to decide between 5.13 or 5.38! I had someone last week give me RPM figures with 5.38 I am looking to see if I can get some figures fr 5.13
Last edited by jeepmedic; 01-09-2011 at 05:48 PM.
03-03-2012, 04:18 PM
#30
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GET 5.13!!! I just got them put on today... couldnt be happier!!! in city driving is much improved! havent had a chance to test high way too much yet... Definately worth the price! Get them with Dave at Northridge!!
