nathanm4653 1 Report post Posted June 29, 2014 I currently have a 1989 e30 with a m40b18 which is auto and done massive amount of kms. And have brought a second m40b18 with alot less kms but have been told the 2nd engine was out of a manual. So will there be any issues swapping them out being auto vs manual or will I need to donate any parts to the newer engine so everything bolts up okay 1 Quote Share this post Link to post Share on other sites