Shop-air powered 8L extractor and refill pump that pulls old ATF out and pushes new fluid up through the fill plug on sealed transmissions.
A sealed automatic with no dipstick, like a BMW with a ZF six-speed or a VW with the 09G, has to be filled up through a plug in the side of the case. Squeezing a bottle under the car or hand-pumping for twenty minutes is how fluid gets spilled and levels end up wrong. This 8 liter air-operated pump, part number B1G99039, does both halves of the job off your shop compressor: it pulls old fluid out under vacuum and pushes new fluid in under pressure, with 15 threaded metal adapters to seal against the fill hole.
On a dipstick transmission you pour fluid down a tube. On a sealed unit the fill hole is also the level hole, and the level is correct when fluid starts to run back out at a set fluid temperature. That means you need a way to push fluid uphill steadily and stop the instant it overflows. The lid on this pump has a vacuum and pressure gauge, a safety valve and a control valve on the main hose, so you can feed fluid in a controlled stream, close the valve when it starts to drip back, and keep the plug threads clean.
Run in vacuum mode, the same tank becomes an extractor. Slide one of the nylon tubes down a dipstick tube or into the fill hole and draw the old fluid out, then read how much came out on the graduated, see-through tank. Putting back what came out gives you a starting point before you set the final level.
If there is no dipstick under the hood, look on the side of the transmission case for a plug above the pan line. BMW six-speeds with the ZF 6HP use an M18 x 1.5 filler plug that takes an 8 mm hex, per ZF's service instructions. Our ZF 6HP BMW 3 Series fluid change guide covers the full sequence, and the general transmission drain and fill guide explains the temperature window on sealed units.
The pump fits any transmission or differential you can reach with one of the hoses or adapters. The 15 all-metal ATF filler adapters cover common European and Asian fill-plug threads, including BMW, Porsche, Volkswagen, Audi and Honda applications. The hoses are a 60 in. main hose with a control valve and quick-connector, a 39 in. clear 6 mm silicone hose, and two 39 in. semi-rigid nylon tubes, 8 mm and 10 mm. Before you start, thread the matching adapter into the fill hole by hand to confirm the pitch; a cross-threaded aluminum case is an expensive mistake. If your vehicle needs a thread this case does not include, our 33-piece sealed transmission adapter kit adds more sizes. Browse more fill and service tools in our tools category.
Torque the filler plug to spec once the level is set; on the BMW 6HP that is 35 Nm.
| Capacity | 8 L (2.1 gal) semi-transparent reservoir |
| Power | Shop compressed air, vacuum and pressure modes |
| Adapters | 15 all-metal ATF filler adapters |
| Hoses | 60 in. main hose w/ control valve, 39 in. 6 mm silicone, 39 in. 8 mm and 10 mm nylon |
| Weight | 8.53 lb |
| Part number | B1G99039 |
Both. Pull vacuum on the tank to extract fluid through a dipstick tube or fill hole, then switch the lid to pressure to push new fluid in through the fill plug.
The kit includes adapters for common BMW, Porsche, VW, Audi and Honda fill threads. BMW ZF six-speeds use an M18 x 1.5 filler plug, so thread the matching adapter in by hand first to confirm the fit before pressurizing.
It runs from normal shop compressed air. Keep the regulator low so the fluid flows in a steady stream; high pressure only makes it harder to stop at the overflow point.
Yes, as long as one of the hoses or adapters reaches the fill hole. Clean the tank thoroughly before switching from gear oil back to ATF so the fluids do not mix.
On a sealed transmission the level is right when fluid starts to drip from the fill hole at the specified fluid temperature with the engine running. On the ZF 6HP that check starts at 30-35 C and must be done below 50 C.
