regearing question(s)
08-23-2009, 03:23 AM
#11
JK Newbie
Join Date: May 2007
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Looks like Northridge has a kit
I wonder if the carrier comes in one of Nortridges kits. They seem to have both an install only and also an install plus overhaul kit. It may provide what you need and they certainely have a ton of experience with jk applications. Probably best to call like the other guy said. A chance to talk to an expert.
Will probably also call this week.
08-23-2009, 09:44 AM
#15
JK Super Freak
I wonder if the carrier comes in one of Nortridges kits. They seem to have both an install only and also an install plus overhaul kit. It may provide what you need and they certainely have a ton of experience with jk applications. Probably best to call like the other guy said. A chance to talk to an expert.
The difference between a simple install kit and an overhaul kit is the bearings. In an install kit you get the bare minimum to install the gears requiring you to use your old pinion and carrier bearings, an overhaul kit includes new bearings and is recommended for higher mileage regears.
You could also try looking into the for sale section of this forum for someone who had 4.10's or 3.73's in their Sahara or X d30 that replaced not only gears but a front locker as well...then they would have an open d30 carrier in the range you need...just a thought.
Or consider upgrading your open diff for a few hundred more and get a locker or limited slip unit...I have the Detroit Truetrac in mine which is a helical geared LSD
08-23-2009, 03:34 PM
#16
JK Enthusiast
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Regearing is not a difficult upgrade. In high school, a friend did his in the driveway in his SuperBee. There are 2 ways that you can D I Y. First and easiest, remove the assembly and take it to a machine/ speed shop and have them install the new gears. That will cost a couple hundred for labor and they can do it in a day. Second, do the whole thing yourself. Be sure to adjust the lash correctly. You can buy a book that shows step by step how to do it or google it and read the various how to's.
08-23-2009, 07:41 PM
#18
JK Super Freak
https://www.jk-forum.com/forums/jk-write-ups-39/gearing-82262/
granted it's tight, and you really should use a case spreader to get the diff in and out and to achieve proper carrier pre-load, but myself and rcjeeper have succesfully accomplished the task
08-23-2009, 09:31 PM
#19
JK Enthusiast
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YES its rubbish.... just came back from the desert today and there is just no power in 2nd gear, its ok when I can get some speed up and keep the revs around 2-2500rpm, but below that its useless, so most of the time im in 1st gear.
im interested about what you saying with the 4.88....... but what would I loose? Im guessing top speed? not that thats an issue in a wrangler, but I regularly drive on a highway at 75mph and its around 2200rpm i think. im guessing to get 75mph with a 4.88 ratio i'd be looking at higher revs?
im interested about what you saying with the 4.88....... but what would I loose? Im guessing top speed? not that thats an issue in a wrangler, but I regularly drive on a highway at 75mph and its around 2200rpm i think. im guessing to get 75mph with a 4.88 ratio i'd be looking at higher revs?
I was miserable with mine until I got my 5.13s with my auto. It would constantly shift out of o/d while chugging down the hwy.
08-24-2009, 01:19 AM
#20
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I have a new X, 6 speed manual, 3.21 gearing, P255/75/R17 tires. I live in a mountainous area. This is my daily driver, though I will be doing some off roading. I am dissatisfied with the factory gear ratio, as I seldom to never use 6th gear, due to lack of power, even at freeway speeds. I have decided to regear, but I need help deciding which ratio I should choose. I plan to install the Teraflex 2.5 BB, and plan to run these factory tires until they wear, then replace them with P285/70/R17s, keeping the stock wheels.
So, the three gear choices that seem to make sense would be 4.1, 4.56, or 4.88.
So, the three gear choices that seem to make sense would be 4.1, 4.56, or 4.88.
The 4.10s should be off the table given your local terrain. You would still have plenty of 2 gear kick downs on the local highways and interstates. 4.56s get the job done, but might prove a little bit limiting if you move to 35s or larger in the future.
Anyway, here's a gear chart to paint a little clearer picture.
