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Old March 6th, 2008, 10:08 AM   #1
XJEEPBlack4.5
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What gears to run?

Is there a thread or chart on this?
I have stock 98xj with 4.5inch lift with 33" Mickey's on it.
It down shift's when I am on the highway running 70 going up a very small hill or when the wind is blowning . I am currently running stock 3.55 gears.

2100 RPM'S @ 70mph.

Need input on this.

Thanks,
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Old March 6th, 2008, 10:28 AM   #2
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I'd go with a 4.10, should provide you good off road and still be reasonable on the highway without running too high of rpm's.
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Old March 6th, 2008, 10:31 AM   #3
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Thread with a link to a chart
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Old March 6th, 2008, 10:32 AM   #4
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Quote:
Originally Posted by 71jeepster View Post
I'd go with a 4.10, should provide you good off road and still be reasonable on the highway without running too high of rpm's.
x2, in fact, that's what I'm regearing to this weekend. But if you have honest intentions of going to 35's in the not to far off future, do 4.56's. No reason to spend the money on regearing twice.
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Old March 6th, 2008, 10:40 AM   #5
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Quote:
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No workie.
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Old March 6th, 2008, 10:41 AM   #6
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http://www.greatlakes4x4.com/showthread.php?t=4384
Worked for me
interco has a table that may help
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Old March 6th, 2008, 10:43 AM   #7
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Quote:
Originally Posted by 71jeepster View Post
I'd go with a 4.10, should provide you good off road and still be reasonable on the highway without running too high of rpm's.

What RPM should I be running @ 70mph?
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Old March 6th, 2008, 10:44 AM   #8
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Here's one too: http://www.quadratec.com/jeep_knowle...article-26.htm
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Old March 6th, 2008, 10:46 AM   #9
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Quote:
Originally Posted by Bronco351 View Post
http://www.greatlakes4x4.com/showthread.php?t=4384
Worked for me
interco has a table that may help

IT WORKIE NOW!

Need to learn how to run computer.
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Old March 6th, 2008, 10:58 AM   #10
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4.10s are low enough IMHO. 4.56s will get you back to about stock performance.
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Old March 6th, 2008, 11:05 AM   #11
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Thanks,
Now need to buy gears & axle rebuild kit!


Later.
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Old March 6th, 2008, 11:09 AM   #12
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Quote:
Originally Posted by ddeadserious View Post
x2, in fact, that's what I'm regearing to this weekend. But if you have honest intentions of going to 35's in the not to far off future, do 4.56's. No reason to spend the money on regearing twice.
I'm prolly gonna have to regear to that too! gonna be getting new 265/75-16's beginning of next week, and they are much bigger then the stockers!
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Old March 6th, 2008, 11:12 AM   #13
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Where and what MFG'S gears to buy?
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Old March 6th, 2008, 12:24 PM   #14
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Will, I just got off the phone with Quadratec,
The guy said I have to change out the differential case
to run 4:10 ratio. That f#$KEN SUCKS!
I didn't know that! I guess I will not be doing that any time soon!
$1,100.00 per axle.

Last edited by XJEEPBlack4.5; March 6th, 2008 at 12:28 PM.
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Old March 6th, 2008, 12:53 PM   #15
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Yeah there are carrier breaks on the d30 and d35. 3.54down and 3.73up. You could find the carrier for cheap from a junkyard, and then all you would have to buy is the R&P and master installs. $1100/axle is pretty ridiculous. You should be able to get out the door installed for $1200-$1300 for both axles.
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Old March 6th, 2008, 12:56 PM   #16
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Yep...along with ring and pinion you will also need a new carrier...You need to find a carrier that is for 3.73 gears and numerically higher. Just keep your eyes open for deals on this board, there is always something for sale!!
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Old March 6th, 2008, 01:02 PM   #17
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Thanks GUY's,
Just alittle piss-off about it! Because I wanted to get this done this weekend. It don't look that way now. I guess I will get some beer and wish that it was done.

Maybe you guy would know this: I have a 94 cherokee sport 4.0L High output "Stock"
would that have that axles I need or would that be the same that I have now?
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Old March 6th, 2008, 01:08 PM   #18
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Quote:
Originally Posted by XJEEPBlack4.5 View Post
Will, I just got off the phone with Quadratec,
The guy said I have to change out the differential case
to run 4:10 ratio. That f#$KEN SUCKS!
I didn't know that! I guess I will not be doing that any time soon!
$1,100.00 per axle.
Way overkill price. Fuck quadratech.

Call Jeeperz Creeperz in Wyandotte, he should give you a MUCH better price.
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Old March 6th, 2008, 01:14 PM   #19
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Quote:
Originally Posted by XJEEPBlack4.5 View Post
Thanks GUY's,
Just alittle piss-off about it! Because I wanted to get this done this weekend. It don't look that way now. I guess I will get some beer and wish that it was done.

Maybe you guy would know this: I have a 94 cherokee sport 4.0L High output "Stock"
would that have that axles I need or would that be the same that I have now?
You need a carrier for the front Dana 30 axle with the carrier break of 3.73 and numerically lower.

You need a carrier for the rear Chrysler 8.25.

You can chose to completely rebuild the axles, or you can "just get by" with minimal parts, depending on who does the labor, you might have an option.

You need gears, Yukon, Genuine Gear, and Spicer are good, solid brands. There are a lot of other quality brands out there too. Just stay away from cheap ass gears.

You need *quality* bearings. Do it once, do it right.

You need a professional to do them, not the redneck down the road who swapped a motor once.

Count on about 2 days to do the project, its not just remove old gears and install new ones, there are certain parameters that they have to be set to, in order to function as intended and have proper install.

Hope this helps! And as previously stated, it should be about $1200-1300 MAX for someone to buy, AND INSTALL the gears. If you get QUOTED that muchh for the PARTS alone, move on
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Old March 6th, 2008, 01:15 PM   #20
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x2 with Jeeperz Creeperz
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