you know, i was wondering that this morning on my way home from work.....im gonna go run outside and check on the wifes car, will post my findings in a second

 

it should work on an auto, the only spot on the trans that would get in the way is under where the pipe would go....the only thing that i would see being in the way would be one of the a/c lines that come off the condensor....but if i use a little smaller pipe then it might not have a problem(neither one of my cars had a/c hooked up so it wasnt an issue).....so i dont see any reason why it couldnt be used on dohc manual or auto...and i dont have a sohc to check, but i dont see whynot