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  #16  
Old 12-24-2002, 11:58 PM
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brookspw,

The flex discs are between the output flange of the tranny and the driveshaft and the driveshaft and the input flange of the differential. The two halves of the driveshaft are joined by a spline joint - no flex disc. If there's enough clearance, the driveshaft does not need to be removed.

The bearing and mount are relatively inexpensive parts - about the cost of the front flex disc. Labor is more, as the driveshaft must be removed from the car, the old bearing pulled off, and the next one installed. Maybe an hour labor.

There is no set mileage for that repair. The bearing can be a little loose and it still work fine and replacement may not solve any vibrations. As was the case on my '87 300D with 260Kmi (believed to be original part).

Its also possible that the centering sleeve (bushing) in the driveshaft (which centers it in the flange of the connecting device, in your case the tranny ouptut flange) lacks sufficient grease or needs to be replaced. I replaced the rear centering sleeve (bushing) on my car, but the front was still fine.
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  #17  
Old 12-25-2002, 12:24 AM
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Quote:
Originally posted by md21722
brookspw,

The flex discs are between the output flange of the tranny and the driveshaft and the driveshaft and the input flange of the differential. The two halves of the driveshaft are joined by a spline joint - no flex disc. If there's enough clearance, the driveshaft does not need to be removed.

Thanks, but I'm aware of that. I replaced my own. What I meant was NOT that the driveshaft must be removed, but that when you loosen the driveshaft (to give it wiggle room) and then disengage the spline (male part) from the female part, that the tranny end and the rear piece of the drive shaft can rotate independently.

I am saying that it may have rotated and, therefore, be misaligned.

Of course, I am speaking of a 190.
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  #18  
Old 12-25-2002, 12:40 AM
soopsmart
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I have worked on these cars for a long time and have replaced many a flex disc. In the part number the 411 number means disc only and the 410 means kit. Each bolt has a washer and the washer always goes against the flex disc, so the bolt that goes thru the driveline flange the washer goes between the nut and the flex disc, the bolt that goes thru the flex disc into the trans flange the washer goes between the bolt head and the flex disc. An old rule-of-thumb says the part number side of the flex disc faces the other flex disc, but does not matter. Where the two drivelines meet there is a slip joint, when doing a flex disc you have to force the driveline backwards to allow room to remove the flex disc. You could damage the support assembly, I dont think thats it. If the mechanic was using a 1/2" impact I would say its probable he over tightened and stripped one of the bolts, thus the bolt would be loose and would cause a vibration. I would also check and make sure the bolts were tight and present at the rear flex disc.
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  #19  
Old 12-27-2002, 09:55 AM
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According to Haynes, the wording "DIESE SEITE ZUR GELENKWELLE" should face the propshaft. I don't speak German, presumably it means "This side towards xxxxxxx"

Does anyone know the translation of 'gelenkwelle'?
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  #20  
Old 12-27-2002, 10:05 AM
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According to my trusty Worterbuch, "Gelenkwelle" is a compound word. Gelenk=joint or joining and welle=shaft so it probably refers to the driveshaft e.g. "joining shaft."

Biz spaeter!
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  #21  
Old 12-27-2002, 11:03 AM
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Quote:
Originally posted by ctaylor738
According to my trusty Worterbuch, "Gelenkwelle" is a compound word. Gelenk=joint or joining and welle=shaft so it probably refers to the driveshaft e.g. "joining shaft."

Biz spaeter!
Love your shoes, by the way :-D
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1994 C280, dark green metallic
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(sold to another forum member)

2003 Chevy Tahoe LT, Redfire Metallic
105k miles

1989 Mustang GT Cobra Convertible
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  #22  
Old 12-27-2002, 02:05 PM
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German Words on Flex Disk???

According to Haynes, the wording "DIESE SEITE ZUR GELENKWELLE" should face the propshaft. I don't speak German, presumably it means "This side towards xxxxxxx"

Does anyone know the translation of 'gelenkwelle'?

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'95 E220 estate
'89 230TE (R.I.P.)


My old flex disk does not have any of these words on it.

All it sayes is: ON THE ORIGIONAL ONE, ONE SIDE SAYS, MADE IN GERMANY & THE OTHER SIDE SAYS, 129 411 00 15, CAD 138, SGF 12, & THE MERCEDES STAR. (WHICH IS FRONT AND BACK)

THE PART NUMBER ON THE NEW ONE IS 129 410 01 15 & THE BRAND IS LEMFORDER. IS THE PART NUMBER WRONG??

Not shouting, just copied from a another post.

Thanks for any and all help!

WW
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  #23  
Old 12-27-2002, 03:02 PM
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I believe I read in the MB CDROM manual that the cars that require a special orientation (one side to front) are the manual transmission cars.

There is more than one type of flex disk.

Later flex disks and those on automatics do not appear to require this special care to make sure one side points to something. However, the information above about where the bolts and washers go is shown in the manual and is important.

Ken300D
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  #24  
Old 12-27-2002, 03:13 PM
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the wording "DIESE SEITE ZUR GELENKWELLE" translated is:
"this side to the drive shaft"

Haasman
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