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Old 09-28-2019, 11:09 PM   #1
xDread92x
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Default 90 240 M47 Ujoint/Driveshaft Nightmare

So I finally discovered my clunks, vibration, and shakes. I got the driveshaft off to do the Ujoints with the hammer method. Getting them out were easy but I ran into problems getting them to set. I saw the other thread posted and am having similar problems getting both clips to fully seat and the ujoint not moving properly. I may have to try and take out the ujoint and try again, although hammering has already taken its toll i'm sure.

1. Is the rear portion of the AW70 driveshaft the same length as the M47? I have an AW70 driveshaft on my spare. I have heard they are different lengths but the rear portions almost seem identical.

2. I will post pics but I discovered the yolk of the rear driveshaft piece looks like it has a crack as well as the seating holes look pretty ate up. I guess that explains the clunking and feeling of misalignment. Insight on this please?? Is it over for that rear yolk??

https://ibb.co/vYf0fvV
https://ibb.co/0QYJzmL
https://ibb.co/qNq4RNv
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Old 09-28-2019, 11:17 PM   #2
Redwood Chair
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*yoke*

Yes that yoke looks compromised.

A vise and sockets is much better than beating on it.

If it starts to bind you can adjust things in the stack to get the right angles and get them pressing again smoothly.

There's no 'feel' when you're beating on it.

~~~~~~~~~~~~

Yes rear props are chassis specific, and front props are transmission specific.

Caveat being the early 1.75" [small] props and late 2' [large] props.
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Old 09-28-2019, 11:28 PM   #3
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Okay so the rear 2" shaft on the AW70 has the same chassis as the M47 so it could fit potentially...

I do believe the yoke could accept the new ujoints but I could still deal with possible future failure/issues. If I got it back together I would have to just install it and see how it does.

Vise and clamp seems nice...I may try that. Could you elaborate on "adjust things in the stack to get the right angles"

Thanks

Last edited by xDread92x; 09-29-2019 at 09:51 AM..
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Old 09-29-2019, 01:41 PM   #4
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Hey guys I really need some insight. I have gotten both caps on fully but I am having trouble getting both clips to fully seat while not locking the ujoint. They are the same thickness as the old clips. I can get one clip to seat perfectly and the other clip will sit right in the slot but when i hammer it down to seat it the ujoint locks up with pressure.

What can i do? Grind down one clip? LOL

What can I do?
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Old 09-29-2019, 02:05 PM   #5
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What can I do?



Buy another prop that doesn't have a bent and cracked yoke.
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Old 09-29-2019, 02:38 PM   #6
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The pics i posted are from the rear driveshaft.

Not the yoke that is attached. Im only working on the spline portion that connects through the center bearing. This is fine and has all its structural integrity
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Old 09-30-2019, 02:32 PM   #7
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Successful U-joint replacement can be tricky. Kudos to you for trying. Easy to mess up when we don't have a lot of experience working with them.

Regardless of what you think (or wish), the ears may indeed be bent. Can happen when using the hammer method. If not, there is a possibility that the new u-joints are slightly thicker (quality control not being what it was), requiring slightly thinner retaining clips. A driveline shop would have these. See if you can stop by there and get some. Or better yet, at this point, get them to inspect what you have and repair it.
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Old 09-30-2019, 02:47 PM   #8
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^

Or




and
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Old 09-30-2019, 09:04 PM   #9
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Hey guys I got it.

Took some trial and error. I think the shaft still has its integrity. Definitely running better.

Its actually quite impossible to find that rear beefy M47 shaft
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Old 09-30-2019, 10:43 PM   #10
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Quote:
Originally Posted by xDread92x View Post
Hey guys I got it.

Took some trial and error. I think the shaft still has its integrity. Definitely running better.

Its actually quite impossible to find that rear beefy M47 shaft


I have one.
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Old 10-01-2019, 02:06 PM   #11
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Hmmm....

Cost? An arm and a leg?

Maybe then I can file for disability and recoup my losses
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Old 10-01-2019, 02:11 PM   #12
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$50 plus shipping which won't be a pretty number due to size and weight.
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