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Old March 17th, 2010, 12:39 PM   #1
steelhd1
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Question Most Gear I Can Get for D30/D44 05 TJ?

I am thinking about regearing now that I am moving to 35" tires. I have a 05 TJ with 4:56's now. What options do I have for more gear? Was considering 5:13's or 5:38's. Opinions welcome and encouraged
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Old March 17th, 2010, 12:53 PM   #2
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4.0 or 2.5? Should be fine with the 4.56s for a 4.0 already. Spend the money on a t case if you want more gear for wheeling
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Old March 17th, 2010, 01:55 PM   #3
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Originally Posted by Jeepaholic View Post
4.0 or 2.5? Should be fine with the 4.56s for a 4.0 already. Spend the money on a t case if you want more gear for wheeling
It's a 4.0 but I am running pretty low RPM's on the pavement with my 33's. I still turn off OD when I am city driving and it's going to be worse with the 35's.
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Old March 17th, 2010, 02:18 PM   #4
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Even using a rubi 4.10 with 31's is real close to 4.56 and 35's, 4.88 and 35's is 100 rpm over the 31's with 4.10's

http://www.novak-adapt.com/knowledge/gearing.htm
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Old March 17th, 2010, 02:22 PM   #5
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Originally Posted by Jeepaholic View Post
Even using a rubi 4.10 with 31's is real close to 4.56 and 35's, 4.88 and 35's is 100 rpm over the 31's with 4.10's

http://www.novak-adapt.com/knowledge/gearing.htm
Well I guess I will give it a shot and see if I can deal with it before buying some gears.

I would still like to know what thw most gear I "could" go with?
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Old March 17th, 2010, 02:44 PM   #6
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4.88 is the highest you can get for a dana 30, unless something new came out i have not seen. the pinion gets a little small on the dana 30 with a 4.88's.
its not worth the swap to go from 4.56 to 4.88 in my opinion. small gain, big price tag.
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Old March 17th, 2010, 02:55 PM   #7
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Originally Posted by joe_jeep View Post
4.88 is the highest you can get for a dana 30, unless something new came out i have not seen. the pinion gets a little small on the dana 30 with a 4.88's.
its not worth the swap to go from 4.56 to 4.88 in my opinion. small gain, big price tag.
I found this online and was considering it.

http://www.4wheelerssupply.com/catal...ducts_id/71506

http://www.4wheelerssupply.com/catal...oducts_id/1747

Last edited by steelhd1; March 17th, 2010 at 03:04 PM.
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Old March 17th, 2010, 04:06 PM   #8
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Quote:
Originally Posted by steelhd1 View Post
i think that is older cj dana 30. 4.88 was the lowest you could get for tj/xj/yj when i had my tj. there could be something new out i dont know about though. the 4.88 pinion is real small, i cant imagine a 5.38 version.

go to pirate and search dana 30 lowest gear, try google too. tj and zj are different than cj or xj(hp)
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Old March 17th, 2010, 04:49 PM   #9
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4.56s should be plenty low enough for 33's 4.10's would even be fine but if you have to get new gears id go with 4.88s or do an intake and exhaust to give you a lil more power
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Old March 18th, 2010, 09:37 AM   #10
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Quote:
Originally Posted by steelhd1 View Post
I am thinking about regearing now that I am moving to 35" tires. I have a 05 TJ with 4:56's now. What options do I have for more gear? Was considering 5:13's or 5:38's. Opinions welcome and encouraged
Quote:
Originally Posted by joe_jeep View Post
4.88 is the highest you can get for a dana 30, unless something new came out i have not seen. the pinion gets a little small on the dana 30 with a 4.88's.
its not worth the swap to go from 4.56 to 4.88 in my opinion. small gain, big price tag.
4.88 is the lowest for the short pinion D30.
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Old April 6th, 2010, 06:11 AM   #11
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I am running 35's and going to 4.88's you should have no problem with 33-4.56's get an exhaust set up and air raid of some sort. (as stated above) my old Jeep had 4.10's & 33's and was decent 4.56 would have been perfect. I did have and do again have Borla header, new exhaust system, high flow air set up, opened up throttle body and spacer, electric fan set up- no fan on motor.

Last edited by Hooperdog; April 7th, 2010 at 06:48 PM.
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Old April 6th, 2010, 06:28 AM   #12
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Quote:
Originally Posted by steelhd1 View Post

I would consider your other suggestions that you asked for first. The pinion gear on a dana 30 4.88 is just a bit bigger than a quater. I imagine the 5.38 will be much smaller and for a "daily driver, weekend warrior" I would NOT suggest you make your r&p your weak link.

You'll be fine with the 4.56's.

As suggested, I'd recommend spending your money on a lower geared tcase.
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Old April 6th, 2010, 08:46 AM   #13
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Quote:
Originally Posted by steelhd1 View Post
It's a 4.0 but I am running pretty low RPM's on the pavement with my 33's. I still turn off OD when I am city driving and it's going to be worse with the 35's.
Are you sure that you have the gears you think you do? Only way that would make sense to me is if you have some kind of power problem with your motor. You should not need to turn off anything with 33's and 4.56's.

Install a 241OR.
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Old April 6th, 2010, 09:16 AM   #14
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Are you sure that you have the gears you think you do? Only way that would make sense to me is if you have some kind of power problem with your motor. You should not need to turn off anything with 33's and 4.56's.

Install a 241OR.
Yea, I am sure they are 4:56's. I put on the 35's and they are just fine
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