I need help
Thread Starter
JK Newbie
Joined: Jan 2026
Posts: 5
Likes: 0
JK Jedi
Joined: Jun 2013
Posts: 11,360
Likes: 2,089
From: Willow Park, TX
Not sure what your DIY level is. It's not difficult for someone that is comfortable wrenching on things.
- Jack up axle
- remove wheels, remove brake caliper, remove brake rotors
- remove 3 unit bearing bolts from backside of knuckle and pull out the unit bearing and axle shafts as a full unit
- remove tie rod from one of the knuckles so you have clearance to get things out
- drain gear oil and remove front diff cover
- remove bearing cap bolts and bearing races and keep track of exactly which one went in which position
- remove carrier and carrier bearing shims, keeping track of exactly the positions the shims were in
- pound out the old inner seals, press in new inner seals using appropriate seal press
- reassemble everything in reverse order and tighten everything to propper torque specs
DIY at home, looking at a few hours of work, maybe $50 in new seals and few quarts of new gear oil. At a shop, I'd suspect $350-450 range as a random guess based on billed hours and parts. Not sure if that is accurate or not though and could vary greatly based on locations.
If you are a DIY'er, can provide further tips and advice. At the end of the day, jeep is not gonna blow up due to this leak, but it's annoying and isn't going to get any better with time.
- Jack up axle
- remove wheels, remove brake caliper, remove brake rotors
- remove 3 unit bearing bolts from backside of knuckle and pull out the unit bearing and axle shafts as a full unit
- remove tie rod from one of the knuckles so you have clearance to get things out
- drain gear oil and remove front diff cover
- remove bearing cap bolts and bearing races and keep track of exactly which one went in which position
- remove carrier and carrier bearing shims, keeping track of exactly the positions the shims were in
- pound out the old inner seals, press in new inner seals using appropriate seal press
- reassemble everything in reverse order and tighten everything to propper torque specs
DIY at home, looking at a few hours of work, maybe $50 in new seals and few quarts of new gear oil. At a shop, I'd suspect $350-450 range as a random guess based on billed hours and parts. Not sure if that is accurate or not though and could vary greatly based on locations.
If you are a DIY'er, can provide further tips and advice. At the end of the day, jeep is not gonna blow up due to this leak, but it's annoying and isn't going to get any better with time.
Thread Starter
JK Newbie
Joined: Jan 2026
Posts: 5
Likes: 0
Not sure what your DIY level is. It's not difficult for someone that is comfortable wrenching on things.
- Jack up axle
- remove wheels, remove brake caliper, remove brake rotors
- remove 3 unit bearing bolts from backside of knuckle and pull out the unit bearing and axle shafts as a full unit
- remove tie rod from one of the knuckles so you have clearance to get things out
- drain gear oil and remove front diff cover
- remove bearing cap bolts and bearing races and keep track of exactly which one went in which position
- remove carrier and carrier bearing shims, keeping track of exactly the positions the shims were in
- pound out the old inner seals, press in new inner seals using appropriate seal press
- reassemble everything in reverse order and tighten everything to propper torque specs
DIY at home, looking at a few hours of work, maybe $50 in new seals and few quarts of new gear oil. At a shop, I'd suspect $350-450 range as a random guess based on billed hours and parts. Not sure if that is accurate or not though and could vary greatly based on locations.
If you are a DIY'er, can provide further tips and advice. At the end of the day, jeep is not gonna blow up due to this leak, but it's annoying and isn't going to get any better with time.
- Jack up axle
- remove wheels, remove brake caliper, remove brake rotors
- remove 3 unit bearing bolts from backside of knuckle and pull out the unit bearing and axle shafts as a full unit
- remove tie rod from one of the knuckles so you have clearance to get things out
- drain gear oil and remove front diff cover
- remove bearing cap bolts and bearing races and keep track of exactly which one went in which position
- remove carrier and carrier bearing shims, keeping track of exactly the positions the shims were in
- pound out the old inner seals, press in new inner seals using appropriate seal press
- reassemble everything in reverse order and tighten everything to propper torque specs
DIY at home, looking at a few hours of work, maybe $50 in new seals and few quarts of new gear oil. At a shop, I'd suspect $350-450 range as a random guess based on billed hours and parts. Not sure if that is accurate or not though and could vary greatly based on locations.
If you are a DIY'er, can provide further tips and advice. At the end of the day, jeep is not gonna blow up due to this leak, but it's annoying and isn't going to get any better with time.
JK Jedi
Joined: Jun 2013
Posts: 11,360
Likes: 2,089
From: Willow Park, TX
most the tools you'd need are very basic. one thing that is not a common one in the tool chest is a 3/8" drive 13mm 12-pt socket for the unit bearing bolts. most 13mm socks that people have a 6-pt. you can get one at just about any auto store though. 1/2" drive likely too large and have interference with the axle shaft u-joint.
some folks just make their own seal press with all-tread, nuts/washers, etc, but considering the amount of effort to get in the diff, it's worth having an actual seal press IMO. I have the actual Mopar press which is nice. Can't recall where i even got it years ago...might have been a find on the marketplace boards maybe. idk...but it's been handy to have. You might search around for "Jeep D30/44 inner seal press" and find a couple different options like these below. I've used that Yukon one in the past and it worked well enough.
https://a.co/d/62Jx1V5
https://tillmantools.com/products/mo...-installer-set
You don't specify if this is a D30 or rubi 44 front axle. If a rubicon, same process but you have to be bit more careful getting the carrier installed again as to not bend the locker's plunger that is in the diff, and of course getting the locker electrical connection disconnected and reconnected (not a big deal, just an extra step).
and of course, you just have to be careful getting the axle shafts reinstalled and not boogering up your brand new seals. lube up the axle shafts splines to help sliding through the new seals. the passenger axle shaft is a bit trickier just due to the length and trying to guide it through the hole which is down the longer side tube.
I'd imagine there are a slew of vids on YouTube to help walk you through the process as well.
some folks just make their own seal press with all-tread, nuts/washers, etc, but considering the amount of effort to get in the diff, it's worth having an actual seal press IMO. I have the actual Mopar press which is nice. Can't recall where i even got it years ago...might have been a find on the marketplace boards maybe. idk...but it's been handy to have. You might search around for "Jeep D30/44 inner seal press" and find a couple different options like these below. I've used that Yukon one in the past and it worked well enough.
https://a.co/d/62Jx1V5
https://tillmantools.com/products/mo...-installer-set
You don't specify if this is a D30 or rubi 44 front axle. If a rubicon, same process but you have to be bit more careful getting the carrier installed again as to not bend the locker's plunger that is in the diff, and of course getting the locker electrical connection disconnected and reconnected (not a big deal, just an extra step).
and of course, you just have to be careful getting the axle shafts reinstalled and not boogering up your brand new seals. lube up the axle shafts splines to help sliding through the new seals. the passenger axle shaft is a bit trickier just due to the length and trying to guide it through the hole which is down the longer side tube.
I'd imagine there are a slew of vids on YouTube to help walk you through the process as well.
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Thread Starter
JK Newbie
Joined: Jan 2026
Posts: 5
Likes: 0
most the tools you'd need are very basic. one thing that is not a common one in the tool chest is a 3/8" drive 13mm 12-pt socket for the unit bearing bolts. most 13mm socks that people have a 6-pt. you can get one at just about any auto store though. 1/2" drive likely too large and have interference with the axle shaft u-joint.
some folks just make their own seal press with all-tread, nuts/washers, etc, but considering the amount of effort to get in the diff, it's worth having an actual seal press IMO. I have the actual Mopar press which is nice. Can't recall where i even got it years ago...might have been a find on the marketplace boards maybe. idk...but it's been handy to have. You might search around for "Jeep D30/44 inner seal press" and find a couple different options like these below. I've used that Yukon one in the past and it worked well enough.
https://a.co/d/62Jx1V5
https://tillmantools.com/products/mo...-installer-set
You don't specify if this is a D30 or rubi 44 front axle. If a rubicon, same process but you have to be bit more careful getting the carrier installed again as to not bend the locker's plunger that is in the diff, and of course getting the locker electrical connection disconnected and reconnected (not a big deal, just an extra step).
and of course, you just have to be careful getting the axle shafts reinstalled and not boogering up your brand new seals. lube up the axle shafts splines to help sliding through the new seals. the passenger axle shaft is a bit trickier just due to the length and trying to guide it through the hole which is down the longer side tube.
I'd imagine there are a slew of vids on YouTube to help walk you through the process as well.
some folks just make their own seal press with all-tread, nuts/washers, etc, but considering the amount of effort to get in the diff, it's worth having an actual seal press IMO. I have the actual Mopar press which is nice. Can't recall where i even got it years ago...might have been a find on the marketplace boards maybe. idk...but it's been handy to have. You might search around for "Jeep D30/44 inner seal press" and find a couple different options like these below. I've used that Yukon one in the past and it worked well enough.
https://a.co/d/62Jx1V5
https://tillmantools.com/products/mo...-installer-set
You don't specify if this is a D30 or rubi 44 front axle. If a rubicon, same process but you have to be bit more careful getting the carrier installed again as to not bend the locker's plunger that is in the diff, and of course getting the locker electrical connection disconnected and reconnected (not a big deal, just an extra step).
and of course, you just have to be careful getting the axle shafts reinstalled and not boogering up your brand new seals. lube up the axle shafts splines to help sliding through the new seals. the passenger axle shaft is a bit trickier just due to the length and trying to guide it through the hole which is down the longer side tube.
I'd imagine there are a slew of vids on YouTube to help walk you through the process as well.
JK Jedi
Joined: Jun 2013
Posts: 11,360
Likes: 2,089
From: Willow Park, TX
the electrical connection for the locker on the axle housing is simply a bridge from the external connection, to the small connection inside the diff....so you just have to carefully unclip it inside the diff, and almost always it seems like the little safety clip breaks cuz it's so delicate and brittle from all the heat, but it's really not a huge deal, just gotta be as careful as possible.
if you have factory gearing still, you'll just have a large carrier bearing shim on either side of the carier, which makes reinstalling pretty easy. if it's been regeared before, you'll have a shim pack of various sizes that you will need to be careful with and will make reinstalling the carrier just a bit trickier and just have to be more careful as to not bend them.
it's been a long time, but what i recall is that the little plunger that signals the locker is activated, needs to be held out (in an expanded position) as you reinstall the carrier back in the diff. what i have done previously is just use a small piece of wood (broken off a paint stick) with a piece of fishing line tied to it (so i could pull and retrieve the piece of wood once the carrier was in place). If you don't, you can risk bending that little plunger when you shove the carrier back in there. You'd see what i'm talking about once you have the carrier out.
if you're anywhere close to replacing your ball joints, there's the real crux...cuz most the teardown is done already at that point and you'd just need to remove the knuckles to get at the ball joints.
if you have factory gearing still, you'll just have a large carrier bearing shim on either side of the carier, which makes reinstalling pretty easy. if it's been regeared before, you'll have a shim pack of various sizes that you will need to be careful with and will make reinstalling the carrier just a bit trickier and just have to be more careful as to not bend them.
it's been a long time, but what i recall is that the little plunger that signals the locker is activated, needs to be held out (in an expanded position) as you reinstall the carrier back in the diff. what i have done previously is just use a small piece of wood (broken off a paint stick) with a piece of fishing line tied to it (so i could pull and retrieve the piece of wood once the carrier was in place). If you don't, you can risk bending that little plunger when you shove the carrier back in there. You'd see what i'm talking about once you have the carrier out.
if you're anywhere close to replacing your ball joints, there's the real crux...cuz most the teardown is done already at that point and you'd just need to remove the knuckles to get at the ball joints.
Thread Starter
JK Newbie
Joined: Jan 2026
Posts: 5
Likes: 0
the electrical connection for the locker on the axle housing is simply a bridge from the external connection, to the small connection inside the diff....so you just have to carefully unclip it inside the diff, and almost always it seems like the little safety clip breaks cuz it's so delicate and brittle from all the heat, but it's really not a huge deal, just gotta be as careful as possible.
if you have factory gearing still, you'll just have a large carrier bearing shim on either side of the carier, which makes reinstalling pretty easy. if it's been regeared before, you'll have a shim pack of various sizes that you will need to be careful with and will make reinstalling the carrier just a bit trickier and just have to be more careful as to not bend them.
it's been a long time, but what i recall is that the little plunger that signals the locker is activated, needs to be held out (in an expanded position) as you reinstall the carrier back in the diff. what i have done previously is just use a small piece of wood (broken off a paint stick) with a piece of fishing line tied to it (so i could pull and retrieve the piece of wood once the carrier was in place). If you don't, you can risk bending that little plunger when you shove the carrier back in there. You'd see what i'm talking about once you have the carrier out.
if you're anywhere close to replacing your ball joints, there's the real crux...cuz most the teardown is done already at that point and you'd just need to remove the knuckles to get at the ball joints.
if you have factory gearing still, you'll just have a large carrier bearing shim on either side of the carier, which makes reinstalling pretty easy. if it's been regeared before, you'll have a shim pack of various sizes that you will need to be careful with and will make reinstalling the carrier just a bit trickier and just have to be more careful as to not bend them.
it's been a long time, but what i recall is that the little plunger that signals the locker is activated, needs to be held out (in an expanded position) as you reinstall the carrier back in the diff. what i have done previously is just use a small piece of wood (broken off a paint stick) with a piece of fishing line tied to it (so i could pull and retrieve the piece of wood once the carrier was in place). If you don't, you can risk bending that little plunger when you shove the carrier back in there. You'd see what i'm talking about once you have the carrier out.
if you're anywhere close to replacing your ball joints, there's the real crux...cuz most the teardown is done already at that point and you'd just need to remove the knuckles to get at the ball joints.