Initial feeling/thoughts after regearing
JK Jedi Master
Joined: Jan 2008
Posts: 11,463
Likes: 165
From: Austin <--> Colorado Springs
Auto
4.10, 32's - 2150 rpm @ 70 mph
5.13, 37's - 2315 rpm @ 70 mph
As noted above, gearing gets you back to a stock, or slightly better than stock, ratio. Then take into account the fact that 37's are huge and significantly heavier than 32's, and that he has likely added a whole lot of extra weight in addition to the tires.
Thread Starter
JK Freak
Joined: Aug 2010
Posts: 555
Likes: 0
From: Johns Creek, GA
Originally Posted by Ragnar JK
I just re-geared last week as well. Just like Corona Doug, went from 4.10's to 5.13's. Running 35's before and after - it definitely made a difference. No question in my mind that this was worth every penny. Wouldn't say it made it bad ass, but you definitely notice the difference in shift points, rpm's at speed, etc...
JK Newbie
Joined: Dec 2010
Posts: 36
Likes: 0
From: Colorado Springs, CO
Originally Posted by NJKen
When I regeared, I went from the 3.21 to 4.88's. I am running 35's and have a 6 speed. My initial thoughts on the local roads were great until I broke it in and drove at highway speeds. Then the disappointment set in...I should have gone 4.56's because I drive between 65-75 mph on the highway and the rpms are a tad too high for my liking.
The new gears definitely made it seem like it has more power which is a good thing but the thing that really amazed me is how unless I am on trails, I never use first gear to start off.
Would I do it again...Definitely but most likely would go with the 4.56's
The new gears definitely made it seem like it has more power which is a good thing but the thing that really amazed me is how unless I am on trails, I never use first gear to start off.
Would I do it again...Definitely but most likely would go with the 4.56's
Right now I can't even use 6th so I'm hoping the change will fix that.
Also if you don't mind me asking what did it cost you? Did you get a locker?
JK Newbie
Joined: Apr 2011
Posts: 6
Likes: 0
From: Logan, Utah
What is your rpm range
[QUOTE=NJKen;2213318]When I regeared, I went from the 3.21 to 4.88's. I am running 35's and have a 6 speed. My initial thoughts on the local roads were great until I broke it in and drove at highway speeds. Then the disappointment set in...I should have gone 4.56's because I drive between 65-75 mph on the highway and the rpms are a tad too high for my liking.
What are your rpm's at between 65-75 I am asking because I have an 07 JKU Rubicon with an automatic and I am regearing to 5.38's and running 37's and am curious roughly what to expect RPM range
What are your rpm's at between 65-75 I am asking because I have an 07 JKU Rubicon with an automatic and I am regearing to 5.38's and running 37's and am curious roughly what to expect RPM range
JK Enthusiast
Joined: Jan 2011
Posts: 135
Likes: 0
From: Groves, TX
I am set to regear my auto from 3.73's to 4.88's on April 27th. My local shop is charging $1500 for the whole job (Front and rear gear changeout, parts & labor, and replacing all seals) with a six month unlimited mile warranty.
JK Enthusiast
Joined: Jan 2011
Posts: 135
Likes: 0
From: Groves, TX
[QUOTE=xprider;2228617]
This website here has a configurable gear calculator with all the different transmissions/transfer cases:
www.grimmjeeper.com/gears.html
When I regeared, I went from the 3.21 to 4.88's. I am running 35's and have a 6 speed. My initial thoughts on the local roads were great until I broke it in and drove at highway speeds. Then the disappointment set in...I should have gone 4.56's because I drive between 65-75 mph on the highway and the rpms are a tad too high for my liking.
What are your rpm's at between 65-75 I am asking because I have an 07 JKU Rubicon with an automatic and I am regearing to 5.38's and running 37's and am curious roughly what to expect RPM range
What are your rpm's at between 65-75 I am asking because I have an 07 JKU Rubicon with an automatic and I am regearing to 5.38's and running 37's and am curious roughly what to expect RPM range
www.grimmjeeper.com/gears.html
JK Enthusiast
Joined: Mar 2010
Posts: 133
Likes: 0
From: Miami, FL
I regeared from 4.10 to 5.38 (automatic), upgrading to 37" Toyo's at the same time.
The acceleration and 'feel' of the shift points are pretty similar after using a Procal but the acceleration is just a tiny bit more sluggish.
Gas mileage sucks a little more and highway driving over 65mph is pretty much over but it's a Jeep. I got what I expected.
Now going to Moab for EJS next year will require a trailer or transport to bring the Jeep. A nice truck and trailer for the Jeep. I should add that to my list now...
The acceleration and 'feel' of the shift points are pretty similar after using a Procal but the acceleration is just a tiny bit more sluggish.
Gas mileage sucks a little more and highway driving over 65mph is pretty much over but it's a Jeep. I got what I expected.
Now going to Moab for EJS next year will require a trailer or transport to bring the Jeep. A nice truck and trailer for the Jeep. I should add that to my list now...
JK Freak
Joined: Feb 2011
Posts: 682
Likes: 0
From: The living room
I regeared from 4.10 to 5.38 (automatic), upgrading to 37" Toyo's at the same time.
Gas mileage sucks a little more and highway driving over 65mph is pretty much over but it's a Jeep. I got what I expected.
Now going to Moab for EJS next year will require a trailer or transport to bring the Jeep. A nice truck and trailer for the Jeep. I should add that to my list now...
Gas mileage sucks a little more and highway driving over 65mph is pretty much over but it's a Jeep. I got what I expected.
Now going to Moab for EJS next year will require a trailer or transport to bring the Jeep. A nice truck and trailer for the Jeep. I should add that to my list now...
JK Enthusiast
Joined: Aug 2010
Posts: 209
Likes: 0
From: El Paso, Texas
Originally Posted by mattonline
I regeared from 4.10 to 5.38 (automatic), upgrading to 37" Toyo's at the same time.
The acceleration and 'feel' of the shift points are pretty similar after using a Procal but the acceleration is just a tiny bit more sluggish.
Gas mileage sucks a little more and highway driving over 65mph is pretty much over but it's a Jeep. I got what I expected.
Now going to Moab for EJS next year will require a trailer or transport to bring the Jeep. A nice truck and trailer for the Jeep. I should add that to my list now...
The acceleration and 'feel' of the shift points are pretty similar after using a Procal but the acceleration is just a tiny bit more sluggish.
Gas mileage sucks a little more and highway driving over 65mph is pretty much over but it's a Jeep. I got what I expected.
Now going to Moab for EJS next year will require a trailer or transport to bring the Jeep. A nice truck and trailer for the Jeep. I should add that to my list now...