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Moser 12 bolt with stock auto steel driveshaft: U joint question, strength question.

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Old 09-26-2009, 05:48 PM
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Tough Mudder
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Default Moser 12 bolt with stock auto steel driveshaft: U joint question, strength question.

Today I tried to put a stock driveshaft in my new Moser 12 bolt. The U joint will ALMOST fit into the yolk (yoke?). Is there another U joint that's about a mm smaller?

Second question: I've heard that the stock steel driveshafts that came out of certain auto cars are stronger than the Aluminum driveshafts that come in our cars. Is this true? I hope so, because I happen to have one.

Thanks in advance,
Hilton
Old 09-27-2009, 07:00 PM
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I searched and searched, and the answer I came up with, was the Precision 372.

It appears that THIS u joint is too small. I wish I'd realized that before installing it. The driveshaft slides back and forth a lot. My grease gun is empty, so I haven't filled it through the fitting. I guess it's possible that the addition of the grease will prevent it from sliding back and forth quite so much.

Have a look, tell me what you think. These pictures are with the driveshaft pushed all the way to the other side. The gap would be halved were the driveshaft centered.






Old 09-27-2009, 07:30 PM
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If the Moser 12 bolt has a 1350 yoke, and you are using the stock driveshaft, you will need a 447 U Joint.

The U Joint you have in the above pictures is the wrong one.

All the stock driveshafts are fairly weak. Your best bet would be to upgrade to a stronger aftermarket driveshaft that has a 1350/1350 U Joint. Bob
Old 09-27-2009, 07:54 PM
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Considering that both the aluminum and steel driveshafts had u joints that were originally mated to factory 10 bolts, you would need to get a properly matched u joint no matter which DS you used, since the Moser yoke is a different size.
Old 09-30-2009, 01:36 PM
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NAPA part #447 is what you need.
Old 09-30-2009, 01:59 PM
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Thanks. That's what I'm going to put in this evening.
Old 09-30-2009, 04:25 PM
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Awesome, now you can finally get those tires on the ground! lol



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