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Old December 16th, 2011, 04:37 PM   #1
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Default Front pinion bearing 04 rubicon

2004 Factory D44. Is the Front pinion bearing replaceable with out removing the differential?

I found mine to be loose while looking into a vibration that gets better in 4wd.
Easy fix or am I going to be tearing the diff apart?

Thanks.

Ps, any write-up out there? I came up with nothing.

Last edited by Bishop; December 16th, 2011 at 06:07 PM.
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Old December 16th, 2011, 05:51 PM   #2
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The bearing nearest the drive shaft yoke can be serviced without removing any gears. You must remove the pinion nut, washer, yoke and seal to get at it. However if you need to replace the bearing race aswell, you may need to pull the axle shafts and the carrier assembly to use a punch to remove the race.. A good slide hammer can pull the race with out removing the rest of the parts.
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Old December 16th, 2011, 05:55 PM   #3
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http://www2.dana.com/pdf/5310-3.PDF

try this, it has been helpfull to me.
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Old December 16th, 2011, 06:10 PM   #4
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Thanks. What's the chances of just the outer bearing being bad, and not the inner?
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Old December 16th, 2011, 06:15 PM   #5
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Quote:
Originally Posted by Bishop View Post
Thanks. What's the chances of just the outer bearing being bad, and not the inner?
dana 44 / driving condition + age of driver - average RPM while traveling
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(tire size) * (gear ratio) - amount of times the vehical has been placed into reverse = 75.24%
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Old December 16th, 2011, 06:32 PM   #6
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I'm overhauling my rear 44 because of a bad pinion bearing. Just take it all apart and do them both. Actually, just get an install kit and do it all.
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Old December 16th, 2011, 06:53 PM   #7
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I'm overhauling my rear 44 because of a bad pinion bearing. Just take it all apart and do them both. Actually, just get an install kit and do it all.
Thanks, does that include a new ring and pinion also?
Sounds like the jeep is going to be down for a weekend.
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Old December 16th, 2011, 06:59 PM   #8
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Quote:
Originally Posted by Bishop View Post
Thanks, does that include a new ring and pinion also?
Sounds like the jeep is going to be down for a weekend.
No
Bearings, seals, and shims. You shouldn't need the shims.
But to price out 4 bearings and 3 seals will probably cost more then the install kit, so that's why I said just get an install kit.
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Old December 16th, 2011, 07:22 PM   #9
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Quote:
Originally Posted by alterego View Post
dana 44 / driving condition + age of driver - average RPM while traveling
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(tire size) * (gear ratio) - amount of times the vehical has been placed into reverse = 75.24%


Thats some good math there.
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Old December 16th, 2011, 10:25 PM   #10
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Quote:
Originally Posted by Bishop View Post
Thanks, does that include a new ring and pinion also?
Sounds like the jeep is going to be down for a weekend.
How bad are the bearings? How long have you drove on it? Depending on the answer you may not be able to get a good pattern after swapping in the new bearings.

A good way to check would be to check your pattern before you tare it apart, that way you'll know if you need to order gears or not ahead of time.

For the install kit check out the link in my sig, Ron has great prices, awesome customer service, and he's in MI too. Also he also sells package deals if you want to use this as an excuse for for a gear swap
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Old December 17th, 2011, 08:15 PM   #11
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Originally Posted by wadey View Post
How bad are the bearings? How long have you drove on it? Depending on the answer you may not be able to get a good pattern after swapping in the new bearings.

A good way to check would be to check your pattern before you tare it apart, that way you'll know if you need to order gears or not ahead of time.

For the install kit check out the link in my sig, Ron has great prices, awesome customer service, and he's in MI too. Also he also sells package deals if you want to use this as an excuse for for a gear swap
I know it's always a concern and something I hear and read people complain about, but I've replaced bearings on a few diff's (carrier and pinion) and never needed to replace the gears. Even if the pattern isn't exactly like it used to be, as long is it's still good there has been no concern. Got one vehicle with over 50k on it since I did the diff bearings and no problems.
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Old December 19th, 2011, 09:55 PM   #12
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Thanks for the help Shawn. I'm going to try and tackle this next week. I'm sure I'll have more questions soon.
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