10L Pneumatic ATF Fill & Extract Pump, 22 Adapters

This is an air-powered 10-liter transmission fluid pump that both pulls old ATF out and pushes fresh fluid back in. It connects to your shop air supply, so a fill that would take forever with a hand pump moves at a steady, controlled rate. A single valve switches the unit between extract and dispense, and a trigger lock holds continuous flow so you are not squeezing a handle through nine liters of fluid.

The reason a tool like this exists is the sealed, dipstick-less automatic transmission. Late-model units such as the GM 6L80/6L90, Ford 6R80, ZF 8HP, and Mercedes 722.9 have no dipstick tube and are filled from a bottom fill plug against a fluid-temperature spec. The 22 metal OE-style filler adapters thread into those fill ports so you can dispense fresh ATF from below without cross-threading a plastic fitting, and an included universal tube handles the older models that still fill through a dipstick.

On the bench the flow is set with a one-touch control gun on a 2-meter PU hose. A safety relief valve is preset at 43 psi (3 bar), so the tank vents instead of over-pressurizing, and a hanging hook plus a 360-degree swivel air inlet keep the hose out of the way while you work under a lift. Usable capacity is right around 9.5 liters, enough to complete most single drain-and-fill or fluid-exchange services in one tank.

Note that the tank lid is torqued down at the factory and is easier to fill by extracting fluid bottle-by-bottle than by removing the cap; plan to run clean fluid only if you also extract with it, since the sealed lid makes interior cleaning awkward. For a shop doing regular transmission services, it pays for itself against the labor of hand-pumping.