Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help

Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 10-04-2008, 09:51 PM
Registered User
Join Date: Aug 2001
Location: El Paso, Texas
Posts: 361
Where is the AT Oil going?

Mercedes 126 722 auto transmission fully rebuilt 5K miles ago; now AT oil is disappearing at a rate of 1 quart per month; absolutely no leaks visible anywhere under the car; dry as a bone; no leaks visible from dipstick, new oil cooler lines dry as a bone; no leaks at front seal; no leaks at rear main seal; where is the oil going? what is the cause? what is the fix?

Reply With Quote
Old 10-04-2008, 10:02 PM
Gilly's Avatar
Registered User
Join Date: Mar 2001
Location: Evansville WI
Posts: 9,616
check engine coolant, may be a crack in the at cooler, which is in the radiator side tank. Would be pushing at fluid into the coolant, coolant will be looking like pepto bismol
Reply With Quote
Old 10-04-2008, 11:25 PM
slk230red's Avatar
WECO Installer
Join Date: Jul 2006
Location: Tampa, FL
Posts: 819
Does your transmission have a Vacuum Modulator. The only time I had Trans. fluid disappearing like that was when my VM was leaking and the engine was burning the fluid through the intake.

1993 190E 2.3
2001 SLK230
1971 LS5 (454) Corvette Convertible
Reply With Quote
Old 10-05-2008, 10:44 PM
Registered User
Join Date: Sep 2008
Posts: 7
It seems to me that it is most likely to be seeping by the internal diaphragm on the vacume module also,These are very inexpensive and easy to install.
Reply With Quote
Old 10-06-2008, 10:40 AM
Registered User
Join Date: Jan 2008
Posts: 112
+3 on vacuum modlator.
Easy to check by pulling off the vacuum hose at the modulator and seeing if there is trans fluid in it. Might be best to do this shortly after running the car.

Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 09:48 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2022, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page