Axle or gearing upgrades important? - JeepForum.com
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post #1 of 20 Old 07-27-2010, 08:07 PM Thread Starter
heethern
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Axle or gearing upgrades important?

On a scale of 1 to 10 with 10 being very important, how important do you think these upgrades are for me. I just got my 33x12.50's in today and will be mounting them up in a couple days. 03 TJ with 90% road driving planned with some offroading. Right now I'm stock on all axles and gearing and It has the 4.0. Thanks for your opinion.

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post #2 of 20 Old 07-27-2010, 08:15 PM
Jay12
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Its all in your opinion. Once you drive with the 33s you will decide if you want it regeared or not/
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post #3 of 20 Old 07-27-2010, 08:50 PM
RaggedOleMan
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Fill in your profile...no one can offer much help, comments or opinions that's indeed valuable to you, unless you do...
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post #4 of 20 Old 07-27-2010, 09:29 PM Thread Starter
heethern
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What does my profile have to do with the question? I have it filled in to the best of my knowledge. All I know is it's stock like I stated in the original question.
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post #5 of 20 Old 07-27-2010, 10:09 PM
Stinkbug
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Without knowing how you are currently geared it would be impossible to quantify how useful a re-gearing would be. This is information that should be included in your profile hence the "fill in your profile" suggestion.
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post #6 of 20 Old 07-27-2010, 10:15 PM
MO2500
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Quote:
Originally Posted by heethern View Post
On a scale of 1 to 10 with 10 being very important, how important do you think these upgrades are for me. I just got my 33x12.50's in today and will be mounting them up in a couple days. 03 TJ with 90% road driving planned with some offroading. Right now I'm stock on all axles and gearing and It has the 4.0. Thanks for your opinion.
Depends entirely on what gear ratio you currently have as well as what transmission you have IMO. If you have 3.07 gearing or the 42rle then I would say you should definitely consider re-gearing for 33's

Like other's have said, try and fill out your profile or give us a little more info on the jeep

Automatic or manual transmission? check your tags on your differential covers to determine what gear ratio you have currently.

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post #7 of 20 Old 07-27-2010, 10:15 PM Thread Starter
heethern
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I was thinking with the abundance of Jeep experts this board had, someone could tell me what I had stock. Guess I will try to find out.
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post #8 of 20 Old 07-27-2010, 10:23 PM
MO2500
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Originally Posted by heethern View Post
I was thinking with the abundance of Jeep experts this board had, someone could tell me what I had stock. Guess I will try to find out.
We could if we were standing next to your jeep but all we know is it's a 2003, 4.0 with 33" tires. We need more info if you're demanding we recommend to you what you should do to your jeep.

All we can tell from what you've given us is that it's got either the 42rle automatic or the NV3550 5 speed manual transmission. Then you have either 3.07 gears or 3.73 gears. All of which make a big difference in our recommendations.

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post #9 of 20 Old 07-27-2010, 10:23 PM Thread Starter
heethern
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I'm pretty sure I have the NV3550 tranny and the Dana 30in the front and 35 in the rear. I will check to see for sure tomorrow on the gears.
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post #10 of 20 Old 07-27-2010, 10:31 PM
MO2500
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You can check to see what your ratio is by looking on the diff cover. Look for a metal tag between the cover bolts. You may need to wipe it clean with a rag.

This is where it is usually located on the D35

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post #11 of 20 Old 07-27-2010, 10:36 PM Thread Starter
heethern
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Thanks for the info!
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post #12 of 20 Old 07-28-2010, 09:15 AM Thread Starter
heethern
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I just got done investigating and found out I have a Dana 44 in the rear and a Dana 30 in the front. 3.73 gears
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post #13 of 20 Old 07-28-2010, 09:46 AM
MO2500
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Originally Posted by heethern View Post
I just got done investigating and found out I have a Dana 44 in the rear and a Dana 30 in the front. 3.73 gears
Nice. Be glad you have that D44 back there It will be much more reliable than a D35 on larger tires.
Does it have a second tag on the other side that says something about a trac-lok limited slip?

3.73 and the 5 speed should handle 33's fairly well. It would be nice to re-gear but I'd rate it lower on my list of priorities as i don't believe it will be horribly slow with 3.73 and the 5 speed. You might find yourself using 4th more to pull hills. Once you drive it with the new tires you can decide if you like the way it handles them and go from there

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post #14 of 20 Old 07-28-2010, 10:11 AM
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Quote:
Originally Posted by heethern View Post
What does my profile have to do with the question? I have it filled in to the best of my knowledge. All I know is it's stock like I stated in the original question.
your profile has EVERYTHING to do with the question. What engine? What transmission? What transfer case? What size tires? What front and rear axles? Limited slip? Do have lockers? Do you want lockers?

If you have a 42RLE your gearing recommendation will COMPLETELY different from that of a 5-speed. If you have a Rubicon, it may be different still.

if you can't answer those questions, you need to get more knowledge and fill out your profile.
http://www.jeepforum.com/forum/f9/tj...embers-722109/

if you indeed have a NV3550 5-speed manual, and a D30/D44, then the recommended gearing for 33s will be 4.56s. you'll need to buy a new carrier for the rear, front carrier will work. might as well put lockers or LSD's in while you're in there...you'll save a few hundred on labor...if you want lockers or LSD.
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post #15 of 20 Old 07-28-2010, 10:14 AM
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I had 5sp and 3.73 with 33s and hated it. Found myself in 4th or even 3rd climbing hills (ok they were mountains really) and a stiff headwind made highway driving a struggle to maintain 65mph. Off road the crawl ratio was no good. On flat pavement with no wind it is liveable but swapping in 4.56s made me a much happier Jeeper.

In ref to above poster you do not "have" to get a new rear carrier you can get the "thick" gears and keep stock carrier. I know because I did to keep my rear locker.
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