10L Pneumatic Transmission Fluid Pump and ATF Extractor

This is a two-way pneumatic fluid pump built for automatic transmission service on sealed units -- the ones with no dipstick and a fill plug on the side of the case. The 10 liter (2.64 gallon) tank runs off shop air through a 1/4 inch NPT inlet: pull vacuum on the extract side at up to 170 psi of supply air, then flip the rotary valve to dispense and it pushes fresh ATF back in at a regulated 43 psi. The relief valve is preset at 43 psi so you cannot over-pressurize the tank or force fluid into a case faster than it will take it.

Fifteen ATF filler adapters come in the case, which is what makes this usable across a shop instead of on one car. They thread or push into the common fill ports on GM 6L80 and 8L90, Ford 6R80 and 10R80, ZF 8HP as used by BMW, Chrysler and Jeep, Mercedes 722.9, and the Toyota and Honda transaxles that fill through a plug rather than a tube. Four hoses are included so you can keep a dedicated line for dirty fluid and a clean line for new fluid instead of cross-contaminating.

Bench procedure is straightforward. Set the reservoir cover valve and intake rod to Extract with the trigger closed, connect shop air, drop the suction hose into a drain pan or the pan drain, and lock the trigger to pull the old fluid out hands-free. Then set the valve to Dispense, pick the adapter that matches the fill port, connect it, and refill to spec with the vehicle at the fluid temperature the factory procedure calls for. Because it is a closed tank you can measure exactly what came out and put exactly that much back in, which is the whole point on a sealed unit where a level check means getting under the car with a scan tool watching sump temperature.

The problem this solves is the funnel-and-gravity method. Filling a modern transaxle through the fill plug against gravity with a squeeze bottle takes forever, dumps fluid down the side of the case, and usually ends up short. A pressurized dispenser puts the fluid in cleanly and lets you do a drain-and-fill or a full exchange in one setup.