Size of the union nut from trans dipstick tube to pan?
 

Anyone happen to know the size of the union nut on the transmission dipstick tube to the transmission pan? I can't get it to budge using a crescent wrench. I know the pan can be dropped with the tube attached, but I'm removing the transmission and would prefer to get the tube out of the way. It also gets in the way of removing another bolt.

It's larger than 19 mm and smaller than 7/8" based on the wrenches I have that don't fit. I'm guessing it's 20 or 21 mm, and may pick up a flare nut wrench to do the trick.

Thanks,
Paul

Not sure either but I think it is 22mm.