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Old 06-27-2013, 04:50 PM   #1
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Question A question for you TJ guys and gals

I have 2 friends with TJ's and am looking for a little help for them.

One just got it and it's a 97, I6 and 5 speed, lifted but not sure how much with a few other goodies but it has some sort of lockers and they make noise and it drives him nuts! He wants to swap out the lockers and go open/open.

The other has had his for a few months, it's an 04, I6, auto and is lifted as well and HE wants lockers.

Sooo my question is which would be the best way to swap parts if they decide to do so, swap the entire axles between the 2 Jeeps OR swap the carriers??

This is beyond me as far as mechanical abilities goes which is why I am asking, I am just trying to get a feel for what could be done so they are both happy with their rigs.

Thanks all!

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Old 06-27-2013, 04:56 PM   #2
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Few questions:

What kind of lockers are they (front and rear)?

Do they both have the same gearing?

Both have a D30/D35 combo?

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Old 06-27-2013, 05:29 PM   #3
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Originally Posted by Cons_Table View Post
Few questions:

What kind of lockers are they (front and rear)?

Do they both have the same gearing?

Both have a D30/D35 combo?
We don't know what kind but it is Franks old Jeep if that helps.

Not the same gearing, franks was geared down and the 04 it stock.

They SHOULD both have D30/D35's.

So how's the new baby? Getting any sleep?

Thanks Geoff.
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Old 06-27-2013, 05:37 PM   #4
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The one with the lockers probably has what is referred to as lunch box lockers witch is the less expensive way to lock your axle as far as the noise typically if they are installed properly they shouldn't make noise. Two your friend who wants lockers needs to look at a lot of things 1 what axels does he have and what size tire a danna 35 is a weak axel and will eventually break with lockers if he runs bigger tires that is if he plans on going off road witch if he isn't there's no point in getting lockers the front if he has a danna 30 he needs to get a supper 30 kit before locking the front or he will face the same Thing there is a lot to consider when adding lockers and to do it right it will cost a lot of money just my 2 cents I have friends who have wasted a lot of money doing it wrong best of luck.
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Old 06-27-2013, 05:50 PM   #5
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Quote:
Originally Posted by jeff_in_rc View Post
We don't know what kind but it is Franks old Jeep if that helps.

Not the same gearing, franks was geared down and the 04 it stock.

They SHOULD both have D30/D35's.

So how's the new baby? Getting any sleep?

Thanks Geoff.
Since he seems to be complaining about how it is driving, I am going to "assume" it has lunchbox lockers. These will be a fairly easy swap, assuming they arent affected by the carrier break. Depending on what the gears are this may or may not be an issue. Assuming the break isn't a problem, you can essentially pull the lunchbox locker out of one jeep, pull the spider gears out of the other jeep, and swap them. I wouldnt swap full axles only because if one is geared different than the other, the jeeps will drive different.

I wouldnt necessarily swap carriers only because you MIGHT have to reshim the carrier to get everything set like it should be. If you dont get it set up just right, you may end up with a noisy diff (whining/humming) or worse. This goes for if it is a full case locker as well. Do you know what a lunchbox looks like vs a full case?

If it were me, Id pop the covers and see what you are dealing with. If it is lunchbox, find out if the break is an issue....and go from there. If they are anything different than lunchbox, it would be a much more involved job than I'd probably want to mess with personally, for any risk of damaging the diff or creating a noisy one. Gears are a pretty precise deal.

And the baby is doing well, Thanks for asking. She just turned two months. I am getting sleep and mom is getting more sleep. There isnt much I can do at night cuz I dont have the right "assests" so I am able to get some sleep in. Mom is getting more now that baby is sleeping 4-5 hours at night vs the short 2 lol.
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Old 06-27-2013, 05:50 PM   #6
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Thanks dirtdigger, neither one has really big tires, the 97 has 31's and the 04 has 32's IIRC. And neither one wants to do any serious rock crawling, just a little more traction in one and less noise in the other. I know you would think the guy with the 97 would be happy but I'm afraid hes not. Oh well to each their own.
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Old 06-27-2013, 05:54 PM   #7
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Since he seems to be complaining about how it is driving, I am going to "assume" it has lunchbox lockers. These will be a fairly easy swap, assuming they arent affected by the carrier break. Depending on what the gears are this may or may not be an issue. Assuming the break isn't a problem, you can essentially pull the lunchbox locker out of one jeep, pull the spider gears out of the other jeep, and swap them. I wouldnt swap full axles only because if one is geared different than the other, the jeeps will drive different.

I wouldnt necessarily swap carriers only because you MIGHT have to reshim the carrier to get everything set like it should be. If you dont get it set up just right, you may end up with a noisy diff (whining/humming) or worse. This goes for if it is a full case locker as well. Do you know what a lunchbox looks like vs a full case?

If it were me, Id pop the covers and see what you are dealing with. If it is lunchbox, find out if the break is an issue....and go from there. If they are anything different than lunchbox, it would be a much more involved job than I'd probably want to mess with personally, for any risk of damaging the diff or creating a noisy one. Gears are a pretty precise deal.

And the baby is doing well, Thanks for asking. She just turned two months. I am getting sleep and mom is getting more sleep. There isnt much I can do at night cuz I dont have the right "assests" so I am able to get some sleep in. Mom is getting more now that baby is sleeping 4-5 hours at night vs the short 2 lol.
I forgot to mention that the guy with the lockers want to regear to a higher ratio and the guy with the 04 wants to lower his ratio, weird huh?

Lots to think about, thanks!
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Old 06-27-2013, 05:55 PM   #8
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Quote:
Originally Posted by dirtdigger View Post
The one with the lockers probably has what is referred to as lunch box lockers witch is the less expensive way to lock your axle as far as the noise typically if they are installed properly they shouldn't make noise. Two your friend who wants lockers needs to look at a lot of things 1 what axels does he have and what size tire a danna 35 is a weak axel and will eventually break with lockers if he runs bigger tires that is if he plans on going off road witch if he isn't there's no point in getting lockers the front if he has a danna 30 he needs to get a supper 30 kit before locking the front or he will face the same Thing there is a lot to consider when adding lockers and to do it right it will cost a lot of money just my 2 cents I have friends who have wasted a lot of money doing it wrong best of luck.
While I will agree that the d35 is pretty big gamble when it comes to locking...the D30 is not. Chromo shafts in a D30 running 35s, is a good idea eventually, but not absolutely necessary depending on what kind of trails you are on. I have ran some moderately difficult trails on a D30, 35s, 4.88s, stock shafts, locked...and have yet to break it. The dana 30 is pretty stout in comparison to the D35.
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Old 06-27-2013, 05:57 PM   #9
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I forgot to mention that the guy with the lockers want to regear to a higher ratio and the guy with the 04 wants to lower his ratio, weird huh?

Lots to think about, thanks!
Why ? what size tires are we talking about?

Higher ratio (numerically), I can understand...Lower ratio (numerically), not quite sure why you would actually do this.
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Old 06-27-2013, 06:07 PM   #10
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Why ? what size tires are we talking about?

Higher ratio (numerically), I can understand...Lower ratio (numerically), not quite sure why you would actually do this.
The guy with the 97 complains about the noise of the lockers and getting 10mpg, hell it's a Jeep, not a prius!

And the guy with the stock 04 wants at least a rear locker and lower gearing cause the stock 373 is a bit high. He has been think 410 or 456.

I am just the guy trying to help, hell I wish I would have gotten the 97!
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Old 06-27-2013, 08:23 PM   #11
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Very true the 30 is a lot better axel but I have seen them break all though I was not the driver and not to sure how experienced they were at crawling I also agree that the re gearing doesn't much make sense maybe if he was going with larger tires I could see a re gear but to stay under 33s he really shouldn't need to have either done much off roading? If not they may want to wait around here it can cost around 1200 just to re gear and that doesn't include the lockers I don't know if they want be on any serious trails there's really no reason to lock plus in my experience front lockers have done a lot more for me than having the rear locked.
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Old 06-27-2013, 08:27 PM   #12
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Also the one with the 97 and 31s should be getting around 15 to 18 mpg if he's only getting ten he has bigger issues than re gearing my 98 with 35s and 6 inch lift gets around 13 mpg

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