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  #31  
Old 02-13-2008, 10:19 PM
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Quote:
Originally Posted by Chad300tdt View Post
If the flex discs look worn or are disintegrating, I wouldn't drive it until they are replaced. I've read stories on this forum of the damage that happens when they finally let loose.

Good luck.
I need a picture of what/where they are so I'm sure of what I'm looking for. Anyone?
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  #32  
Old 02-13-2008, 10:38 PM
Unofficial wormcan opener
 
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Flex discs. http://catalog.worldpac.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=2AS1CGTP02AS1CH3J5&year=1984&make=MB&model=300-DT-001&category=K&part=Drive+Shaft+Flex+Joint
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  #33  
Old 02-13-2008, 10:38 PM
bgkast's Avatar
Rollin' on 16s
 
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Quote:
Originally Posted by imagesinthewind View Post
Yep, so far it needs brakes, heat (water pump and/or monovalve and/or tstat), may need tie rods (slight play in steering but car doesn't wander), odo work, braided fuel lines replaced, oil leak found and fixed.. .
Sounds like the typical "new" Mercedes stuff. For $70 and a weekends worth of time you can fix it up.

Here is what a flex disk looks like (there is one at the front of the drive shaft just behind the transmission, and one at the back of the transmission just in front of the differential)



Hopefully yours does not look like this:



While you are under there also try giving the drive shaft a wiggle at the center support bearing (Under the car between the front seats).
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  #34  
Old 02-13-2008, 10:44 PM
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This is from the service manual --


No.s 1 and 2 are the flex discs making the connection between transmission/driveshaft/differential.
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  #35  
Old 02-13-2008, 11:00 PM
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I think in KC you've got Hafkemeyer motors (7115 Wyandotte, KCMO 816-333-8880) and Star motors (7 west 62nd terrace KCMO 1-800-STAR-LTD). They are closer to the west side of KC. I've not been to these places but have been recommended by others in past. I'd like to help you but I'm an hour away and tomorrow I'm flying to your town (Denver).

Kevin

1978 300D
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  #36  
Old 02-13-2008, 11:02 PM
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Hey guys, as you heard, Ginny called me earlier this evening with basically the same info she has posted here. It seems like the sound is coming from the bellhousing area from what I can gather. Flex disk, debris on driveshaft, etc. would not make a noise when car is stationary, although it should be looked at. I'm guessing something is amis in the bell housing, or at the front pump, (loose torque converter bolts, or possibly debris in the bell housing). She said the starter sounded normal, so I doubt it's a loose starter dragging on the ring gear, although she did say the starter drive didn't engage on the first try when cold, she could hear it grinding on the ring gear. If anyone knows of a good Indy in the area now would be a good time to chime in.
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  #37  
Old 02-13-2008, 11:09 PM
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Quote:
Originally Posted by Johnt49 View Post
Flex disk, debris on driveshaft, etc. would not make a noise when car is stationary, although it should be looked at.
I didn't get from her posting that the noise was present when stationary. Was that said during yall's conversation?
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  #39  
Old 02-13-2008, 11:10 PM
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Quote:
Originally Posted by Johnt49 View Post
Hey guys, as you heard, Ginny called me earlier this evening with basically the same info she has posted here. It seems like the sound is coming from the bellhousing area from what I can gather. Flex disk, debris on driveshaft, etc. would not make a noise when car is stationary, although it should be looked at. I'm guessing something is amis in the bell housing, or at the front pump, (loose torque converter bolts, or possibly debris in the bell housing). She said the starter sounded normal, so I doubt it's a loose starter dragging on the ring gear, although she did say the starter drive didn't engage on the first try when cold, she could hear it grinding on the ring gear. If anyone knows of a good Indy in the area now would be a good time to chime in.

From her post it sounded like it only makes the sound when moving.

My new '82 is making a strange noise from the transmission when stationary too: My new '82 300D sounds like it has a supercharger
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  #40  
Old 02-13-2008, 11:18 PM
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Quote:
Originally Posted by JimmyL View Post
I didn't get from her posting that the noise was present when stationary. Was that said during yall's conversation?
Yes it was. She described it as a "Shhhhhh" sound when stationary,which seems to be coming from the bellhousing area if I understood right. Then the rhythmic sound once under way.
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Last edited by Johnt49; 02-13-2008 at 11:50 PM.
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  #41  
Old 02-13-2008, 11:36 PM
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Quote:
Originally Posted by imagesinthewind View Post
We were going along about 10 miles from the border to Kansas and we hear a sound and it's not a good sound. It's a brushing sound with a beat. Shh Shh Shh Shh. Sound is constant with no beat under 30 mph. Once I go faster the sound catches a beat and goes faster with the car speed. Doesn't get louder or softer with speed.

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  #42  
Old 02-13-2008, 11:37 PM
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I have never had really bad flex discs, but I did have a not-so-good center support bearing on one of the cars. I think that if anything in the driveline starts to go bad at higher speeds you would feel the vibrations up through the seat into your body if you are paying attention to it. I would think that it would sound a bit more than a couple of horsehair brushes. Whatever it is, do what you can to take a look at it in daylight. Perhaps you can drive one side of the car up onto a curb and squeeze under there, or just find anyone kind enough to put it on a lift and start shaking things. There should be no visible cracks in either of the flex discs and the center support bearing should deflect no more than 3/8" or so when pulled on. It is amazing the difference a new set of flex discs makes on a car with a manual transmission. You can actually feel them load/unload. The difference isn't so obvious on a car with an automatic, until they fail.
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Last edited by rs899; 02-14-2008 at 07:37 AM.
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  #43  
Old 02-13-2008, 11:53 PM
Admiral-Third World Fleet
 
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I keep re-reading your description of the noise and I can't think of anything obvious. Could it possibly be speedometer cable lightly binding within its sheath ( the needle would dance a bit if this were the case) or just a noisy v-belt on the engine? With the car standing in neutral, when you rev the throttle do you hear any of this noise?

Rick
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Last edited by rs899; 02-14-2008 at 06:36 AM.
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  #44  
Old 02-13-2008, 11:58 PM
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I was wondering about the flex plate given the location and the starter episode. It would have to make the noise at idle as well.

Kevin

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  #45  
Old 02-14-2008, 07:17 AM
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Quote:
Originally Posted by imagesinthewind View Post
Update:

I do have a hell of an oil leak and it looks like fuel leaks at all each injector.

On a side note, I feel really stupid.
What made me think I could do this?
I have brought my teen daughter across the country hoping, not knowing, I'd get home okay.
Why did I trust the universe this much?
I'm not doing well.

I'm going to go take a shower and hope (there I go again) that one of you has had this happen, that it was something really simple and I can be on my way again, happy, in the morning.
Thanks. . .
I can't offer much specific advice on the sound/potential flex disc issue.....but don't feel stupid, the forum is with you (much like the force!). You'll make it home, your daughter will be fine and you'll remember this maiden voyage forever. I still think it's cool what you're doing.

As others have mentioned, the leaking return lines aren't a big deal - but as I might have suggested before - if a home depot or lowes are nearby - pick up some weedwhacker fuel line and replace. It's an easy fix if you have the time and you'll save some fuel and keep things clean/dry in there.
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