Hey,check out the Post #43
Engine S-H-U-D-D-E-R under low speed power - Page 2 - Bimmerforums - The Ultimate BMW Forum
He is right I think.
Also I read the bulletin from BMW and for ZF transmissions it states :
USE ONLY ESSO ATF LT 71141 BMW PART NUMBER 83 22 9 407 807 20 LITER BLUE – LIFETIME FILL
Clear enough IMO...next time I am gonna DIY once the warranty in off..in a year.
Mine is shuddering yet...and originally it started to shudder once the ATF was changed( no TC drain though)...after the rebuilt I think the shop didn't really follow the procedure the way it should've been. As it was a second ZF tranny ever for them...anyway..I need this shudder gone,the lurch is gone,so shudder will be too
some day.