Auto Transmission Fluid Transfer Pump Accessories

I have a ‘Tool Guy Republic’ drill-powered fluid transfer pump and always found it frustrating to use because the tube would never stay submerged below the fluid level in the bottle, and it was difficult to operate solo without something falling out of place along the way.  This kit may work with various other fluid transfer pumps, but was specifically designed for the one I have.  The printed tubes accommodate approximately 10-11mm O.D. tubing.

I designed these accessories to solve that problem, and also made a printable version of a ZF transmission filler tool (equivalent to CTA tools 7411 or Blauparts T2A0102).  It works by drilling a hole in the fluid container cap (which may be reused with the printable plug included, or saved for future use), screwing the cap back on, and putting the printed tube through the cap until it hits the bottom.  From there, screw one of the cap adapters on the top side until it bottoms out on the cap, and then remove the tube and cap, and secure the tube fully to the cap with the other cap adapter from the bottom (see photos).  A step drill bit can easily drill the hole needed for the tube to fit (about 19-20mm).  Install the final assembly back to the fluid container, slide the input hose to the very bottom of the tube, and then the input side is ready.  The ZF filler tool is designed to be a snug fit for 7-9mm I.D. tubing, and I recommend using a hose clamp to secure it to the tube to prevent it from slipping off during use.

With the input and output hoses prepared, you can now easily rest the filler in the transmission fill hole, and operate the pump without having to keep the input tube positioned in the bottle below the fluid level, this setup will allow all but the very bottom of the bottle to be sucked through the pump.

For chemical resistance and ease of printing, I recommend PETG for this application, though other materials may also be suitable.  I do NOT recommend using any filaments with GF or CF added, as this will increase the possibility of unwanted particulates ending up in the fluid.  Before using these tools, they should ideally be cleaned with a pipe cleaner and deburred of any stray plastic bits, as you don't want anything to end up in the fluid.  The fluid cap should also be deburred after drilling the hole.