hi everybody,
So far this hasnt caused me any problems, but i have a feeling that it eventually will and im just wondering what it is.

in my 1991 300D 2.5, often when i hit the throttle from a dead stop, especially going uphill, the car will make a noise and it will hesitate slightly. The noise is a kind of a shuddering noise that lasts for about 1-2 seconds, originating somewhere in the transmission or the rear diff or somewhere in between.

Its starting to get pretty annoying, whenever i have someone in my car they ask "what was that??" The noise doesnt seem to be getting any worse, i would say it started around 2 years ago, the diff has been looked at since then so i dont think its there.

let me know what you think!

thanks

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1991 300 D 2.5 Turbo, 220k
also in the family:
1981 240 D 185k
1991 350 SD 185k
2006 S 500
2005 SLK 350

driveshaft carrier bearing?? cv axles?

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1984 123.193 372,xxx miles, room for Seven.

1999 Dodge Durango Cummins 4BTAA 47RE 5k lb 4x4 getting 25+mpgs, room for Seven.

Check the fluid level in the box. I had a similar sensation when mine was leaking and the fluid ran a litre low.

U-joint?

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Certified Registered Nurse Anesthetist (CRNA)
2002 F250 powerstroke with Plantdrive WVO conversion
1983 300SD 190K miles ,sold
2006 E320 CDI

its not the fluid level, checked that first.

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1991 300 D 2.5 Turbo, 220k
also in the family:
1981 240 D 185k
1991 350 SD 185k
2006 S 500
2005 SLK 350

Check the condition of the rubber flex disks at both ends of the driveshaft.

__________________

Gone to the dark side

- Jeff

I'm guessing it's the driveshaft mount. Though you should ideally check out all of the components underneath the car. Does it only do it when accelerating through the 1-2 and 2-3 gear shifts?

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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate

Sooner or later every car falls apart, ours does it later!
-German Narrator in a MB Promotion Film about the then brand new W123.

it only does it from a dead stop, and only when i accelerate pretty hard. it doesnt do it at all once the car is under way.

ill get around the checking flex discs et. al. but right now i have a fuel issue!

thanks

__________________
1991 300 D 2.5 Turbo, 220k
also in the family:
1981 240 D 185k
1991 350 SD 185k
2006 S 500
2005 SLK 350

turns out it was the transmission! i pretty much knew that, i was just in denial. I put it in reverse on day, but it didnt do anything! oh well.

thanks

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1991 300 D 2.5 Turbo, 220k
also in the family:
1981 240 D 185k
1991 350 SD 185k
2006 S 500
2005 SLK 350

wrong again! or, rather i was right the first time. the only gear that was busted was the reverse. the tranny shop said all the others were fine so i didnt need a full rebuild (whew!).

it still does the shuddering thing, but not as much. even the couple weeks before the reverse went out it seemed to be getting better. now, if i want it to make this sound i have to really punch the throttle.

no idea, the shop checked the flex discs, so maybe its the diff?

thanks

__________________
1991 300 D 2.5 Turbo, 220k
also in the family:
1981 240 D 185k
1991 350 SD 185k
2006 S 500
2005 SLK 350

Bad motor mount?

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

nope, those are new. at this point, the only thing i can imagine is that its something in the diff, like the gears are grinding back there (of course, i dont have a very good imagination!). Is that possible and what would that sound like?

__________________
1991 300 D 2.5 Turbo, 220k
also in the family:
1981 240 D 185k
1991 350 SD 185k
2006 S 500
2005 SLK 350