Yay! Another f*%*^* problem!
When I come to a stop (as I'm about stopped), I hear/feel a thump underneath the car. Yes, my tranny flares in 3 gears. Yes, my tranny fluid leaks-probably from the tranny seal. No, I have not done any of the supposed 'adjustments' to the tranny (via the vacuum system?) that might help the flaring.
Thanks. Oh, the car I speak of is the MB in my sig.

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1982 Silver 300DT

Definately a vaccum leak. If there's not enough vacuum going to the transmission at the 2-1 downshift, then there will be that "thump" you feel. Get a MityVac and start finding and fixing those leaks.

-Joe

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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.

My father took his car to the dealer with the same complaint back in the 60's. The mechanic simply removed the pop bottle from under the front seat.

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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

Oh man, I spit my beer on that one!

Hey, back on topic (lol), would the flaring be a symptom of a vacuum leak as well?

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1982 Silver 300DT

Shut off your climate control and see if it continues. On my 300TD, when I had a leak in a vacuum pod in the heater, it caused that thump. How are your door locks working?

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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

It occurs regardless of the state of the climate control.
My door locks are virtually inoperable.

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1982 Silver 300DT

are you sure its transmission related? sounds kinda like guide rod mounts to me.

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have no worries.....President Obama swears "If you like your gun, you can keep it

With not enough vacuum, it will give a hard shift (and clunk downshift).
With too much vacuum, it will flare.

Hmm...

Plug the line under the hood that goes to the doorlocks. That will stop any vacuum locks thru the locking system.

__________________
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

Interesting topic. I have the same issue on a 300TD (wagon) with the thud/thunk noise when I come to a stop. Trans shifts "ok". It seems as though it could be better. My door lock vacuum does not work as well. My climate control seems to be fine.

What does this mean and where are the guide rods..."sounds kinda like guide rod mounts to me."?

If it is the tranny clunking , I think you will need to adjust the vacuum control valve (some are adjustable) on the back of the IP. If I recall correctly, it needs to provide something like 12-15 inches of vacuum to the tranny at idle as you are coming to a stop. I had this happen on one of mine . Do a search on vacuum control valve and see what the knowledge base says.

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80 300SD (129k mi) 82 240D stick (193k mi)77 240D auto - stick to be (153k mi) 85 380SL (145k mi) 89 BMW 535i 82 Diesel Rabbit Pickup (374k mi) 91 Jetta IDI Diesel (155k mi) 81 VW Rabbit Convertible Diesel 70 Triumph Spitfire Mk III (63kmi)66 Triumph TR4a IRS (90k mi)67 Ford F-100 (??)

My climate works 'ok', but it sure takes it's time heating up. When the outside temp gets under 40 F or so, it never really gets very warm in the cabin...

I assume plugging my vacuum line to the door locks will make them work manually, at least, right?

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1982 Silver 300DT

That's exactly what I was thinking.

His vacuum problems ar eprobably a whole different issue.

Danny

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1984 300SD Turbo Diesel 150,000 miles

OBK member #23

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Did a quick experiment this evening...

Before coming to a stop I gassed it a little to possibly build a little extra vacuum and it seemed as though the thunking disappeared on those subsequent stops.

Am I possibly reaching a valid conclusion or do you think it was pure coincidence?

bump....what are guide rod mounts?