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Old 03-08-2018, 11:24 PM   #26
PromiseRing
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Yeah there’s some yellow blobs that look like they were created by a 3 year old. Installed those as close as possible and it still vibrates.
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Old 03-09-2018, 12:32 AM   #27
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Did you knock the cups back against the circlips?
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how psi stock cna support?

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Old 03-09-2018, 01:17 AM   #28
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Did you knock the cups back against the circlips?
U joint itself functions flawlessly. Everything there is smooth.
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Old 03-09-2018, 01:18 AM   #29
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I guess i should drive the car on the highway rather than test it on jackstands.
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Old 03-09-2018, 03:22 AM   #30
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Originally Posted by Redwood Chair View Post
Strange usually the zerk fitting is on the 'cross' not the cup so it supplies all the bearings with one fitting.
Zerk in cup can supply all the bearings if the crossbone is drilled thru in both directions. Best way to use those is to remove the zerk fitting after greasing and install plug, until next time.
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Old 03-09-2018, 12:59 PM   #31
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Quote:
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Did you knock the cups back against the circlips?
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U joint itself functions flawlessly. Everything there is smooth.
You didn't answer my question.
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Old 03-09-2018, 01:54 PM   #32
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You didn't answer my question.
The answer is yes. I had the cups installed to where I could start to see the C clip groove, then I slowly tapped the C clip and cup in together until it popped into place. I did this on all four so they should all be touching the C clips.
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Old 03-09-2018, 01:55 PM   #33
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I can’t say for sure if the car is vibrating since I haven’t had it on the highway yet, but he did seem to vibrate when it was on jackstands the same way it did before. So I’m assuming it’s going to vibrate just as bad still. I had the axle supported so it was like the car was sitting at his normal ride height.
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Old 03-11-2018, 12:19 PM   #34
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How good is your center support mount?
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Old 03-11-2018, 01:51 PM   #35
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So do you need the drive shaft that I got from you. I still have it if you need it. You probably did this but after you install everything tap around the ujoints, it help seat everything and free it up. Should be no tension if the joints are seated.
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Old 03-11-2018, 03:35 PM   #36
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How good is your center support mount?
Itís decent but the vibration only stared after I separated the halves.

I have yet to drive the car on the highway with the new u joint, but on jackstands it seemed like it vibrated at like 60mph through 80mph or something. So highway speeds. Iíd drive it on the highway today but for some reason itís snowing itís ass off. It was like 60F yesterday.
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So do you need the drive shaft that I got from you. I still have it if you need it. You probably did this but after you install everything tap around the ujoints, it help seat everything and free it up. Should be no tension if the joints are seated.
Not yet but Iíll keep that in mind. Iíd have to separate that one too to replace the center support bearing.
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Old 03-12-2018, 12:00 PM   #37
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Still vibrates at highway speed but it’s bearable. I think the halves may be up to 30 degrees off. It’s very difficult to get it perfect.
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Old 03-12-2018, 03:30 PM   #38
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Check out my Photo of the drive shaft alignment marks I found on my 88 245 m47 car.
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Old 03-12-2018, 03:36 PM   #39
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Check out my Photo of the drive shaft alignment marks I found on my 88 245 m47 car.
Iíll have to look closer again for arrows.
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Old 03-13-2018, 04:05 AM   #40
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Just out of curiosity, wondering if you measured the diameters of each section ?

* I have a 92 m47 & recall the rear section larger in dia. Front around 2" rear 2.5" (iirc), I recall not being able to find info about this, but fortunately ran across an exact replacement in better cond & for a reasonable price.
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Old 03-20-2018, 10:12 PM   #41
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Here’s my driveshaft. Still vibrates at highway speeds. You can faintly see the yellow scribbles. They’re somewhat lined up but idk exactly how they're supposed to go. There are no arrows as far as I can see. Here’s what I’m thinking..notice how the rear ujoint appears to be about 5 degrees clockwise when the 3 bolt flange up front is flat. Does the orientation of those 2 matter? nvm that doesn’t make any sense.






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Old 03-21-2018, 04:23 PM   #42
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So lost cause??
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Old 03-21-2018, 06:04 PM   #43
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Turn the other half 180 degrees and try again. Sometimes it can be all it needs. Just making sure, both joints move freely and without force?

Got to say that 240 has been really forgiving for driveshaft virbrations compared to 700/900. I've installed different halves together that have suited the purpose and really rarely there has been any sort of vibration. If there has, then turning the other half 180 has fixed it.
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Old 03-21-2018, 07:08 PM   #44
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Turn the other half 180 degrees and try again. Sometimes it can be all it needs. Just making sure, both joints move freely and without force?

Got to say that 240 has been really forgiving for driveshaft virbrations compared to 700/900. I've installed different halves together that have suited the purpose and really rarely there has been any sort of vibration. If there has, then turning the other half 180 has fixed it.
I don’t think there is a 180 degree out option. There’s x amount of splines so there’s x amount of different ways it could go in.

I believe m46 cars could be 180 out?
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Old 03-21-2018, 09:46 PM   #45
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IMHO, wrong on both counts.

Think about it. If the number of splines is even, then you pull it out, rotate it by half that number of splines. It has moved 180 degrees. (I don't know if the number is even)

With a shaft that is all u-joints, such as with an M46, you are aligning two yokes that are symmetrical. If you rotate it by 180 it is the same. Worst case is 90 out.

That guibo d/s is crazy. Why didn't they put a key spline in it if there is only one correct position?
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Old 03-21-2018, 09:58 PM   #46
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^ so you think it’s guibo related or still driveshaft orientation related?
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Old 03-21-2018, 10:03 PM   #47
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I am not commenting on that (sorry, I know that is what you want to know). What I am saying is that with a shaft that is all u-joints you can align it by looking at it. With the guibo end being three lobes, and the u-joints being two lobes, there is no visual scheme for easy alignment.
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Old 03-21-2018, 11:20 PM   #48
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I am not commenting on that (sorry, I know that is what you want to know). What I am saying is that with a shaft that is all u-joints you can align it by looking at it. With the guibo end being three lobes, and the u-joints being two lobes, there is no visual scheme for easy alignment.
Yeah Iím pretty much ****ed as far as I can see. This is extremely annoying and I have no idea what to do.
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Old 03-21-2018, 11:39 PM   #49
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Try every position kama sutra style.
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Old 03-22-2018, 06:52 AM   #50
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Assuming the technical diagram is correct courtesy hiperfauto, then you can deduce 2 only possible locations for(driver side arrow) on long center piece(rr shaft section). Finally noting the position of the triangle end there should only be 3 possible locations(of arrow).

If the diagram is correct that leaves 2 possibilities for rr section and 3 for frnt section.


** I have a similar situation,.. I had previously replacd m47 rr drive shft section, torq rod bushings, inspectd guibo & centr bearing but still a lingering vibration around 45-55 mph
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