Hydrak clutch and trans oils

[rivman]

What is the recommended oil to use in the hydrak fluid coupling and in the transmission gear box?

[vox_incognita]

Hi,
The service docs recommend the hard to find GM spec ATF Type A suffix A (MB 236.2)
http://bevo.daimler.com/bevolistenmain.php?navigation_path=bevolisten&blatt=236.2&content_action=show&PHPSESSID=92b08c7d751ce7e9116ee75f8888b75a

http://bevo.daimler.com/bevolistenmain.php?session_id=&navigation_path=bevolisten&language_id=1

Dexron spec was yet to come back then,and nowadays most MB ownes use it as direct replacement to the obsolete TASA (which MB still recommends for manual trannies up to the mid 90-ies):
http://bevo.daimler.com/d/d/en/BB00.40-P-0231-01A.pdf

The attachments list the MB approved oils of the era,the oil level check and oil change procedures.
Good luck!