Is it possible for coolant to get to the trans? anybody??
thanks

Well i know this sounds very stupid but my 84 300d had a lot of rust and like mud in the cooling system, i made a concoction that i was to remove after a brief drive, it consisted of and please dont laugh shout and bleach, the car just started slipping and not going into gear all of a sudden. Mixture has now been removed.I did drive it a couple of days with the soapy bleach mixture to try and cleanse my system but my trans does not feel well at all.
Any help would be appreciated.

The only component that links the transmission to the cooling system is the transmission cooler lines, which deliver transmission hot fluid to the radiator for cooling, and back to the transmission.

I would look at the radiator to see if the coolant is going into the transmission system. Vice versa too, if the ATF is going into the cooling system it would look reddish. It could have potentially been the rust or mud you observed.

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did you check tranny oil level? if it leaks (or mix) anywhere it will be easily
observed.

also if oil is present in coolant,what about coolant in oil?

it is very hard to imagine those two mixed but if true I guess your
tranny would be destroyed in a minutes.

cheers
ChO

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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

very common on i.e. 210 models.
The radiator supplier had issues and this killed many trannies.
In case of 123 the tranny oil heat exchanger tubing in the radiator could be leaking from rust.
Once the car is parked the residual pressure in the (engine-) coolant system pushes coolant into the tranny.
At least the friction plates will be damaged.


Tom

Just to agree. Has to be the trans cooler in the radiator tank. DON'T drive the car until it's fixed!

Dan

HAHAHHAHAAHAHAHHAAAAA I'M LAUGHING MY HEAD OFF... LOL... !!!!

Oops, you said not to laugh. Sorry. I'm Mr. Somber now.








Seriously, the only thing I'm laughing at is you telling me not to laugh. Sorry to hear about your troubles -- if you look at the transmission fluid on the dipstick, milky fluid would indicate coolant in the fluid.

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1982 300SD -- 211k, Texas car, tranny issues ____ 1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod

2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die."

Why did you put bleach in the coolant system?

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Current:
*1984 300D ~200K,1989 MR2 250K, 2012 Ford Fusion 4.5K (fiance's car to replace the uber-unsafe cavalier)
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Past: 1998 Chevy Cavalier ,2005 Saab 9-3 2.0T, 1996 Mazda Protege, 1974 Porsche 914 2.0, 1997 Land Rover Discovery 4.0L/5Speed, 1995 Jeep Wrangler

It definitely could be the cooler, and it certainly could allow antifreeze in the trans fluid. If this is the case, change the transmission fluid and filter NOW, and fix the leak of course! Antifreeze or water in ATF can destroy your clutches.

Best of luck with it.

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2014 Porsche Cayenne six speed manual

Annoy a Liberal, Read the Constitution

The possibility of that heat exchanger failing makes me want to bypass mine...

-J

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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.

This is why I invested the money in a new radiator! Plus the fact the top of mine was slowly separating...

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Ya, but w126 603 radiators are nearly $600!


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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.

From WHERE!!?? I've had excellent luck with aftermarket rads in a number of cars and they're WAY cheaper. Many of them seem to came from Canada though I can't say on any particular unit.

Dan

I used bleach and shout stain lifter in there because i wanted to do a short run and dissolve the muddish gunk in the cooling system, n ot a bright idea at all, i think some little piece of that mud must have gotten dislogged and made it to valve body, anyway i drained the trans and the converter and replaced filter, topped off with SWEPCO hydraulic atf and one entire bottle of lucas stop slip and the trans is sweet as can be again, to be assured i also picked up a used but in good shape radiator that had been running recently on a clean w123 turbo car, with Mercedes coolant, am also replacing water pump as mine was old and the fans were starting to rust and i am also replacing fan and clutch because i feel old clutch wasnt blowing quite as strong and that may have been part of the over heating problem.