Broken front drive shaft universal - JeepForum.com

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post #1 of 16 Old 06-15-2017, 07:58 AM Thread Starter
Leckbass
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Broken front drive shaft universal

Taking a leisurely drive to the gas station this morning...

I hear: clunk clunk clunk and the front drive shaft universal joint, where it meets the transfer case broke.

It seems like the Yoke straps came off.





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post #2 of 16 Old 06-15-2017, 08:00 AM Thread Starter
Leckbass
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time to put the lift kit on hold and address this
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post #3 of 16 Old 06-15-2017, 08:10 AM
puppybreath
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I've seen that happen a few times when some odd bit of junk rust flake, sand or just a burr on the flange kept the end cap from seating in the yoke properly. When you snug the strap bolts, they'll get tight and even reach proper torque, but after a while the 'junk' breaks up or works itself out and you have a loose cap.

Make sure the threads are good in the yoke, inspect the strap and replace whatever shows damage.
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post #4 of 16 Old 06-15-2017, 11:33 AM
Mookdog
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Looks like the bolts just came out instead of breaking. Should be fine to clean it up and make sure nothing else got damaged. Looks like you may just be out a new u-joint and some new straps/bolts. I'd make friends with Loctite!
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post #5 of 16 Old 06-15-2017, 02:28 PM Thread Starter
Leckbass
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Looking for the correct one, Moog 369? part number 4882793

or Moog 280?

any others that you would recommend?

Any step by step procedure that you would recommend?
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post #6 of 16 Old 06-15-2017, 02:41 PM
doskiez
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I had this happen to me in my dump truck. Someone else drove it and was complaining about vibration and it turns out the ride height valve on the air suspension had failed and the bags were flat. That caused poor driveline angle and introduced vibration. I fixed the valve and a few days later the U joint ripped out of the yoke. I believe the bolts had loosened from the vibration. Your jeep is obviously not a dump truck but I wanted to offer a cautionary tale around stray vibrations. Just something else to check once you get it put back together.
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post #7 of 16 Old 06-15-2017, 05:00 PM
project_mercy
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Quote:
Originally Posted by Leckbass View Post
any others that you would recommend?
From what I've read on this forum, they seem to recommend the Dana Spicer U-Joints. For you, I think it would be your normal 1310 u-joint, so you'd just have to decide if you wanted the greaseable or non-greaseable ones. I don't know what people's stance here on that is. Hopefully one of them will comment.

With your help I will resist the urge to buy a chrome grill guard for yet another day.
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post #8 of 16 Old 06-15-2017, 07:01 PM
Mookdog
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I like my spicer 1310s. Went in easy, smooth no issues with them. I haven't had them in long maybe a few months so I can't speak to long term durability
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post #9 of 16 Old 06-16-2017, 03:37 AM
timatoe
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Use Spicer u-joints and get a new strap kit.

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post #10 of 16 Old 06-16-2017, 06:02 AM
Mookdog
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Careful with the cheap strap kits from Autozone. I bought new ones thinking I was smart and a bolt sheared off while I was torqueing it. Luckily a drill and EZ-Out saved the day. Considering these fall into the "spinny thing" category of parts, buy good new ones and make sure they're torqued to spec.
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post #11 of 16 Old 06-16-2017, 02:07 PM Thread Starter
Leckbass
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my buddy just dropped off 2 Moog universal joints 280 that fit the YJ.

I know many people recommended the Spicer comma but I have these here and I've always liked Moog products too so I'll give them a try
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post #12 of 16 Old 06-16-2017, 05:46 PM
JeeperDon
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Don't blame the strap/bolts. It's just poor maintenance. Crawl under now and again and check things out, see whats loose, snug up critical bolts (like those).

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post #13 of 16 Old 06-17-2017, 06:53 PM Thread Starter
Leckbass
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Quote:
Originally Posted by JeeperDon View Post
Don't blame the strap/bolts. It's just poor maintenance. Crawl under now and again and check things out, see whats loose, snug up critical bolts (like those).
The first thing I checked was the other ones...
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post #14 of 16 Old 06-19-2017, 01:47 PM
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Seeing how dirty the trunnion is I would bet the cap has been off or loose for a while. New joint, straps, Loctite you are back in business.

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post #15 of 16 Old 06-20-2017, 08:36 PM Thread Starter
Leckbass
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All back together and fixed, I ordered the Spicer U joints in case something happens next time. Thanks for your help
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