10-Speed Transmission Fill Adapters – Honda & Acura

I have designed 5 adapters to fit everyone's needs. These transmission fill adapters are designed to simplify fluid servicing on Honda and Acura 10-speed automatic transmissions. The first 4 options threads directly into the side fill port, providing a secure connection when top breather access is limited or impractical. The 5th option installs by pressing it into the countershaft speed sensor port after removing the sensor, allowing fluid to be filled from the top of the vehicle.

All adapters are now manufactured from flexible TPU material, offering excellent durability and resistance to common automotive chemicals. (Previous ASA versions have been discontinued.) Select which adapter you would like or pick up the whole kit at checkout.

Available Options (5 Configurations)

The first four versions thread directly into the transmission side fill port:

1. 3/8" Barb Adapter (Outside Diameter) (Blue)
Designed to connect directly to standard 3/8" hose for pump-assisted fluid filling.

2. 1/2" Barb Adapter (Outside Diameter) (Yellow)
Provides a larger hose connection option for higher flow applications.

3. Honda Factory Pump Adapter (Orange)
Designed specifically to accept the metal section of the Honda DPSF factory fill tool, creating a secure seal during pumping operations.

4. 1/2" ID Adapter w/ 90° Fitting & Hose (Clear)
Includes:
1/2" inner diameter adapter
90-degree plastic fitting
17 inches of 1/2" vinyl hose
This configuration is designed for gravity-style filling. Simply attach a long, narrow-neck funnel to the hose and pour fluid from above.

5. 1/2" ID Adapter Countershaft Speed Sensor Fill w/ 90° Fitting & Hose (Red)
To use this tool, remove the countershaft speed sensor located on the top-side of transmission below the brake master cylinder. Once the sensor is removed, press this adapter into the port (it is pressure fit). Then attach the 90° fitting with vinyl tube and fill with a slim neck funnel or equivalent.
Includes:
1/2" inner diameter adapter
90-degree plastic fitting
17 inches of 1/2" vinyl hose
This configuration is also designed for gravity-style filling. Simply attach a long, narrow-neck funnel to the hose and pour fluid from above.

Purchase Options Note:
When purchasing the complete set (all 5 adapters), the kit includes all five adapters, along with one (1) 17-inch vinyl hose and one (1) 90° fitting.
When purchasing the Clear adapter or Countershaft (Red) adapter individually, each option includes one (1) 17-inch vinyl hose and one (1) 90° fitting.
Application Notes

Threads directly into the side fill port on applicable 10-speed models.

Ideal for situations where top breather filling is difficult or not preferred.

Constructed from flexible TPU for durability and chemical resistance.

While many 10-speed transmissions can be filled from the top breather, these adapters provide multiple reliable options depending on access and preferred workflow.