I have a 83 300sd with 356000 miles just recently I seem to be losing ATF.No drips,or spray under car.No atf coming thru modulator,no atf in radiator.This will be 5 quarts added in 3 weeks. Any thoughts?

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

Wow...that's a lot of fluid to see no evidence.

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14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles
06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion

19 Honda CR-V EX 61k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife

unless it spits when running down the road.No fluid on roadway.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

.

plugged filter no proper oil supply to moving parts
increase of temp and lower oil amounts equals oil burn.... perhaps?

did you felt any smell on stick during adding the oil?
.

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w126 500SEC gen II euro, powered by OM617 turbo stolen from 84 300SD 2.88 diff,EGR blinded
next wish/project: w114 coupe OM603 powered

no smell of burnt,I use a semi syntheic fluid and change regually.Car is driven only 10 miles 4 days a week.Dipstick always low,I will check radiator lines,maybe a blockage but trans would have spit out fluid.I have never had to add fluid in the 12 years I've owned it.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

Failure in vacuum modulator. Fluid is being sucked into vacuum pump and thence into the engine. Check dipstick, is engine oil high?

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"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970

found it,its somewhere in the area where the steel line is braced to the engine.Maybe chaffed there for so long. I will cut line,and use a hose between the break.My son is supposed to buy a car in Dec for college.I will junk car after,as interior shot,nasty fuel tank,sub mounts gone in front,,and jack holes rusted in front. Been a good one though.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

Nice suggestion, accounts for all the symptoms. You really are an asset to this forum and a smart cookie to boot!

My mother's 70's Lincoln ( gas ) had that problem.. but with no vacuum pump it was being burned by the engine...but not enough to show as smoke... frustrating to find some things back before the internet.

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1980 240d ,

chain elongation, cam marks reference:
http://www.peachparts.com/shopforum/diesel-discussion/10414-help-i-need-check-stretch.html

http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html

evap fin cleaning:

http://www.peachparts.com/shopforum/diesel-discussion/156207-photo-step-step-post-showing-w123-evaporator-removal-1983-240d-1982-300td.html?highlight=evaporator

A/C thread

http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html

Interesting. I wonder why no drips or other evidence of an external leak? Perhaps the fluid flow / pressure in the line to the transmission cooler is too low at idle to cause the leak to show up? So it only leaks at speed? We need a transmission person to offer an opinion!

Carpe, thank you.

Leathermang, how did we get anything done before the 'net?

Jeremy

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"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970

How are you checking the fluid level?

Improper checking of the fluid, can lead to the trans always seeming low or empty....

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It does not move when low,as for drips.I was looking at bell housing,and rear of trans.My front tie rod on the drivers side was soaked.I new I was leaking diesel from the big filter bolt.So I stuck my finger on tie rod and it was red.Steering is perfect with new hoses.So it was not it. I'll just add two quarts a week for the next three weeks of college.winter is here,and I can't stand being out doors.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

It was HARD.... sometimes Impossible.... because TSB's ( Technical Service Bulletins ) which the factory sent to the dealers to warn of problems and how to fix them... were kept secret by those dealers....
If it was not in the car's FSM, Motor's Manuals, Chiltons, Petersen publishing books, Hot Rod magazine , etc... you needed an old mechanic friend or luck.

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1980 240d ,

chain elongation, cam marks reference:
http://www.peachparts.com/shopforum/showthread.php?threadid=10414

http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html

evap fin cleaning:

http://www.peachparts.com/shopforum/diesel-discussion/156207-photo-step-step-post-showing-w123-evaporator-removal-1983-240d-1982-300td.html?highlight=evaporator

A/C thread

http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html

Before the Net, he probably got a l more done. Now he spends a good deal
of time blabbering here on the Forum.


Charlie


sent from my pos computer

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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

Me, I got bye with a little bit of mechanical ability and a whole lot of pig headedness! (this according to my sweetie pie wife) Don