Review on Efficient 2PC Transmission Funnel: Gear Up for Seamless Fluid Transfer by David Caldwell

There's nothing wrong with a simple funnel; it just doesn't work for many transmission oil intakes. In my case very big. The tip has a 1/2 inch ID - too big. I had to cut out a small kitchen funnel to add it, which isn't the best solution, but it worked. The size of the inner and outer diameter of the tip must be specified for all funnels - otherwise you only buy without "real" (mandatory) knowledge. Note that the photo looks like it tapers off at the end - this is the "guess" I ordered it with. The tube does not taper at the end.