86 190d transmission leak - PeachParts Mercedes-Benz Forum

toofast99 · #1 01-17-2007, 02:54 PM

Hi,
I am new to the forum here so try not to crucify me for not searching the board as I have spent the majority of the day yesterday doing so without much luck.

I am going to be buying my brother's '86 MB 190d. The car is in pretty good shape overall with a few exceptions. The transmission leaks pretty badly and has done so for years. He has always just added fluid as needed and the car runs fine. I would like to fix the problem but have a few questions. He said the the front pump of the transmission on that car did not come with any type of gasket, seal, or anything from the factory and it is a metal to metal fit. After years of hot/cold cycling of the metal and warpage the fluid starts leaking from around the front pump and that an upgraded/newer style front pump with gaskets will fix the problem... Does this make any sense?

He also said that if the car is jacked up on the drivers side trans. fluid will just pour out... But very little will pour out if it is jacked up on the passenger side... In normal driving/parked conditions it still leaks quite a bit.

Does this sound like a front pump problem or something else? I have no problem dropping the transmission out and replacing parts or seals/gaskets but I do not want to go into this blindly.

I found a seal online that is listed as "AT Pump Seal" here is the link. In the description it says front pump cover. Would this fix the leak if it were coming from the front pump?

Any help would be greatly appreciated.

Thanks

Jetmugg · #2 01-17-2007, 03:21 PM

You should also check the location where the dipstick enters into the transmission housing. This is another potential area for leaks. I don't recall exactly what kind of seal is used at that location, whether it's an O-ring type seal or a punched gasket.

SteveM.

toofast99 · #3 01-17-2007, 03:26 PM

Quote:

Originally Posted by Jetmugg

You should also check the location where the dipstick enters into the transmission housing. This is another potential area for leaks. I don't recall exactly what kind of seal is used at that location, whether it's an O-ring type seal or a punched gasket.

SteveM.

When he told me it leaked more when the drivers side was jacked up that was the first thing that came to my mind. I have not had a chance to look under the car and see for myself though.