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Old 03-14-2012, 09:22 AM   #1
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D30 u-joint upgrades

I had my jeep to the shop yesterday and they told me I need new u-joints on my front axle. When he should me they have a ton of play. I was quoted $440 for it and I don't have that kind of money right now so I'm gonna pull my axles myself and just have my local guy replace the u-joints for me. My question for you guys is what u-joints should I buy? I want to upgrade and get stronger ones but I don't know much about this subject but I'm researching and learning everything I can. So what u-joints should I get to upgrade? And is there any helpful hints for pulling the axle? Thanks so much!

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Old 03-14-2012, 09:38 AM   #2
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I hope by pulling the "axle" you mean the axle shafts. No need to bust your @$$ and pull the whole axle to replace U joints. Pulling the axle shafts is a pretty simple task though. You will need to unbolt the two brake caliper bolts on each side of the axle, then remove the rotor, then unbolt the three 12pt bolts that attach the unit bearing to the steering knuckle. After you do this, give it a tug and the axle shaft should pop out.

A good U joint replacement for the D30 is the spicer 760x

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Old 03-14-2012, 10:14 AM   #3
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Really? Forgive me for being a idiot ahead of time, but are you saying I would have to drop the back axle to replace the u-joint? In my classic car past, we just unbolted and slapped a new one in.
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Old 03-14-2012, 10:16 AM   #4
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Really? Forgive me for being a idiot ahead of time, but are you saying I would have to drop the back axle to replace the u-joint? In my classic car past, we just unbolted and slapped a new one in.
No. You only have to pull the axle shafts...you dont have to drop the entire axle.

But what U joints are you talking about in the "back" axle? The only U joints on the jeep are in the drive shafts (f&r) and in the front axle.
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Old 03-14-2012, 10:16 AM   #5
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Would it be better to get a u-joint that is grease-able? Thats what a few friends have told me, but I heard good things about the Spicer 760x which is not grease-able.

Also, where do you guys like to buy the u joint from?
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Old 03-14-2012, 10:19 AM   #6
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In Spicer the non greasable joints are stronger....alljeep.com is where I get spicer parts from
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Old 03-14-2012, 10:21 AM   #7
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Would it be better to get a u-joint that is grease-able? Thats what a few friends have told me, but I heard good things about the Spicer 760x which is not grease-able.

Also, where do you guys like to buy the u joint from?
I have heard that its not worth it to get greasable joints unless you are always playing in the mud or water. This way you can flush out the crappy watered down/muddy grease with new fresh grease. The 760x is also supposed to be stronger.

I bought my joints online, I dont remember the site though.
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Old 03-14-2012, 10:24 AM   #8
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I just checked Alljeeps.com, but they are discontinued there
U-Joint Kits **DISCONTINUED** USE 5-760X

Quadratec has them for $40, but looks like other places are as little as $20.
5-760X Dana Spicer 1310 Axle U Joint Non Greasable

^I've never heard of that web store above, so I am kind of weary about purchasing from them
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Old 03-14-2012, 10:27 AM   #9
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Old 03-14-2012, 10:30 AM   #10
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Thanks!!

Should I get two and do both u joints on the axle shafts? Right now its just my driver side with alot of slop.
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Old 03-14-2012, 10:45 AM   #11
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Thank you guys for the help! And no I'm not going to drop the whole axle. Just take the shafts out. But to date this is the biggest project I'll do so I just wanted some input. And also with this 760 spicer joint that will be a good upgrade to do? I want to make sure I do this right the first time
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Old 03-14-2012, 12:44 PM   #12
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Spicer's 5-760x is a great upgrade and what I would go with.
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Old 03-14-2012, 01:47 PM   #13
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One more quick question for you guys. Can I pull the axle shafts and put the tires back on and drive like that? The reason for this is that I don't want to have the u-joint go boom on the road and I have to drive 100 back up to school on sunday then I drive about 200 miles per week. I know I would be able to use four wheel drive but if at all possible I would like to minimize the chance of doing a freeway repair or limping to a garage. Thank you again for all the help and quick replies!
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Old 03-14-2012, 01:54 PM   #14
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Doesn't sound like a wise plan to me. But we'll wait for Jerry to chime in.
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Old 03-14-2012, 02:04 PM   #15
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Quote:
Originally Posted by Jersey Sahara
One more quick question for you guys. Can I pull the axle shafts and put the tires back on and drive like that? The reason for this is that I don't want to have the u-joint go boom on the road and I have to drive 100 back up to school on sunday then I drive about 200 miles per week. I know I would be able to use four wheel drive but if at all possible I would like to minimize the chance of doing a freeway repair or limping to a garage. Thank you again for all the help and quick replies!
Well in the way I mentioned removing the shafts, it would be impossible to even put your wheels back on. However if you disconnect the unit bearing from the shafts, then reinstall the unit bearing on the knuckle you would be able to put the wheels back on I believe. Don't know if thats a good idea or not since any time I took the shafts out I put them bak before driving...never actually thought about needing to pull the shafts but still needing to put the wheels back on
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Old 03-14-2012, 02:24 PM   #16
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You can drive without the shafts installed, I would plug the axle tube with a rag or something to keep dirt or water from getting in the pumpkin, and keep the gear oil from running out and all over. You will want to check your oil level when you reassemble.
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Old 03-14-2012, 02:30 PM   #17
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You can not drive with just the hub.. you need to have the pressure from the outer shaft on the nut as well. So as Long as the short side is installed yes you can, no short side.. bad idea... best replace the joint 1hr at the most.
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Old 03-14-2012, 07:55 PM   #18
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Put another way... you can leave the inner axle shafts and/or u-joints out and drive forever like that. However, the short outer axle shaft stubs MUST be installed, they are what hold the unit bearing hubs together. There was a guy killed on a highway here in California who got on the highway after removing his Jeep's outer axle shaft stubs. One of the unit-bearing hubs came apart and it caused his Jeep to swerve right into the path of an oncoming truck.
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Old 03-21-2012, 02:21 PM   #19
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curious as to what alot of play is considered in this situation. Out of curiosity i lifted the front and push/pulled on the top of the tire. observed about a 1/4"-3/8" play. Took the tire off and of course the play was not as great but still had a noticeable "rocking" free play in one of the u-joint cups

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