G2 Core 44 owners manual? - JeepForum.com
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post #1 of 17 Old 07-24-2021, 09:09 AM Thread Starter
bartimusmaximus
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G2 Core 44 owners manual?

Is there such a thing? I bought a complete rear axle and it's got adjusters on it to change bearing preload and pinion depth and all kinds of cool crap but no paper work telling you what does what or how to do any of it and the person I talked to at G2 said there was no literature for the axles and he couldn't even tell me how to make the adjustments. Something inside this rear axle isn't right. It takes everything I got to get one of these 35" tires to rotate an axle shaft. I have the exact same 5.38 gears and eaton E-Locker up front and it rotates very smooth and very easy. Any input would be great.

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post #2 of 17 Old 07-24-2021, 09:18 AM
CJ7-Tim
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I would suggest that before you start messing with things that normally are not messed with, you find an experienced differential technician and have them look at it.

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not to overthrow the Constitution but to overthrow the men who would pervert the Constitution” Abraham Lincoln, 1859.
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post #3 of 17 Old 07-25-2021, 09:27 AM
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LS? are both tires off the ground?
Can you pull the axles and check the pinion rotational torque again?

Can you post pictures of your diff?
Sounds a lot like a variant of the Ford 9".

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post #4 of 17 Old 07-25-2021, 11:02 AM Thread Starter
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Quote:
Originally Posted by CJ7-Tim View Post
I would suggest that before you start messing with things that normally are not messed with, you find an experienced differential technician and have them look at it.
@CJ7-Tim the closest one is an hour north of me. I have all the special tools required to swap out a ring and pinion. I have no experience with this axle. There are no shims. If I had a manual I'd have no issue fixing the problem or atleast improve the situation so I can drive it up on a trailer. The axle is brand spanking new and just installed.
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post #5 of 17 Old 07-25-2021, 11:29 AM Thread Starter
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[QUOTE=jeepdaddy2000;41320549]LS? are both tires off the ground?
Can you pull the axles and check the pinion rotational torque again?

Can you post pictures of your diff?
Sounds a lot like a variant of the Ford 9".[/QUOTE @jeepdaddy2000

both tires are off the ground and no drive shaft hooked up. I hear it's similar to a 9" . but it's a complete hybrid axle. Everything is adjustable by turning adjusterbolts on the outside of the housing. There are no shims.
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post #6 of 17 Old 07-25-2021, 12:05 PM
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[quote=bartimusmaximus;41320647]
Quote:
Originally Posted by jeepdaddy2000 View Post
LS? are both tires off the ground?
Can you pull the axles and check the pinion rotational torque again?

Can you post pictures of your diff?
Sounds a lot like a variant of the Ford 9".[/QUOTE @jeepdaddy2000

both tires are off the ground and no drive shaft hooked up. I hear it's similar to a 9" . but it's a complete hybrid axle. Everything is adjustable by turning adjusterbolts on the outside of the housing. There are no shims.
I just watched a couple of u tube videos on the axle.
The carrier adjustment is internal and is very similar to the Ford 9"
I see no provision for external pinion depth adjustment. If I'm wrong please explain.

All that being said, the first thing to check is the pinion rotational torque. You can do this with your hand. Rotate the yoke back and forth within the limits of the backlash. It should move smoothly and with little effort. If it doesn't, then you have a bearing preload issue or the pinion is binding with the ring gear.

Next, remove the axles and using the pinion, rotate carrier assembly. It, like the pinion, should move smoothly and with little effort. If it doesn't, then you have an issue with the bearing preload or the ring gear is binding.

Next reinstall the axles. The entire assembly should rotate by hand and with a minor amount of effort. If it doesn't, then the issue is with the axle bearings/preload.

All this is assuming the brakes aren't installed and dragging.

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post #7 of 17 Old 07-25-2021, 01:17 PM Thread Starter
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I can not rotate the yoke without a huge Cresent wrench. It doesn't turn smooth either. It slips every once and a while. Would the fact it's never been oiled cause this issue? Because it was shipped dry and its been in the crate for 9 months.
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post #8 of 17 Old 07-25-2021, 01:20 PM Thread Starter
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@jeepdaddy2000 I'll do that next and report back.. Thank you
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post #9 of 17 Old 07-25-2021, 04:44 PM
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As suggested, a functional check is your first step after a generous application of lubrication. I would locate the eaton E-Locker installation manual and confirm all the clearances, pre-loads and shims/adjusters are correct.

I notice that all the fasteners are paint pen marked to indicated loosening or unauthorized monkey business. The axle has a warranty, doesn't it ?

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not to overthrow the Constitution but to overthrow the men who would pervert the Constitution” Abraham Lincoln, 1859.
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post #10 of 17 Old 07-25-2021, 10:54 PM
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Quote:
Originally Posted by bartimusmaximus View Post
I can not rotate the yoke without a huge Cresent wrench. It doesn't turn smooth either. It slips every once and a while. Would the fact it's never been oiled cause this issue? Because it was shipped dry and its been in the crate for 9 months.
There is no way a lack of lube will cause this. I'm suspecting there is no backlash and the ring and pinion are binding or somebody forgot to shim the pinion bearings and ran down the yoke nut.
Checking the backlash a the pinion or carrier will confirm or deny this.

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post #11 of 17 Old 07-26-2021, 02:05 PM Thread Starter
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@jeepdaddy2000 I'm headed out there this evening to check it. I forgot to mention that I removed the brakes and it was still hard to rotate the pinion. The axles rotate fairly easy.. but the yoke never turns while turning the axle..
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post #12 of 17 Old 07-26-2021, 02:30 PM Thread Starter
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@jeepdaddy2000 ring gear back lash is 0.008
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post #13 of 17 Old 07-27-2021, 05:22 AM
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Quote:
Originally Posted by bartimusmaximus View Post
@jeepdaddy2000 ring gear back lash is 0.008
OK good.
Time to narrow down the issue.
Can you move the carrier by hand within the .008 backlash? if so, the problem is the pinion. If not, then I would suspect the carrier is too tight or possibly (new thought?) the air locker O ring is bone dry and dragging. You can verify the issue by again trying to move the pinion back and forth within the backlash. Movement would indicate a carrier issue, Zero movement would indicate a pinion issue.

While it is good to narrow down the problem, as CJ7-Tim stated:
Quote:
The axle has a warranty, doesn't it ?
Knowing what/where the problem is will be nice if you have to contact the seller with any warranty questions.

Paperwork will ruin any military force.
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post #14 of 17 Old 07-27-2021, 10:20 AM Thread Starter
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The pinion moves within that same tolerance. I decided to call g2 yesterday. I explained to Tom that I have a new waggy 44 front with the exact same g2 gears and eaton E-Locker in it that I use 1 finger to turn the yoke on it and have to use a 2 foot Cresent wrench to turn the yoke on this core 44 axle and said " put the differential cover back on and fill it with gear oil and drive it. It's supposed to be Like that. It just needs broke in that's all.". So I repeated the part about having to use a 2 foot Cresent wrench to turn the yoke, with no tires or brakes attached. And he said "yep. It's all good. Make sure you use non synthetic oil and change it after 500 miles.".
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post #15 of 17 Old 07-27-2021, 07:58 PM
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If they say run it, then run it.

I would send them an E mail with your description of the issue. Demand he send you back his instructions. This way you have a record of him telling you to run it if something goes wrong and you need warranty work.

Paperwork will ruin any military force.
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