Transmission Dipstick Filler Tube Grommet for 1965-2004 Mustangs with C3, C4, C5, A4LD, AOD, AOD-E and 4R70W Transmissions.
This grommet goes on the end of the automatic transmission dipstick filler tube and creates a seal where the dipstick tube goes into the transmission case.
I have a '72 C4. I found that this grommet was smaller than what was needed. After installation, it still leaked. I obtained a slightly larger and thicker grommet at a local hardware store that did the job.