Keep automatic transmission fluid where it belongs with the ATP Automatic Transmission Dipstick Tube Seal FO-36 (also written FO36). This O-ring seals the joint where the filler/dipstick tube meets the transmission case, and it drops in as a direct-fit replacement across a wide range of listed applications — including the 1979-1987 Chevrolet Chevette, 1978-1994 Ford Bronco, 1989-1995 Geo Tracker, 1998-2004 Lincoln Navigator and 2001-2005 Ford Excursion. This part covers 144 applications in total — see the Buyer's Guide tab for the full list and the engine-level detail for your vehicle.
A worn tube seal can allow fluid seepage and let contaminants in at the tube; a fresh O-ring restores the sealed connection during service.
Interchange: 391308S102
This part cross-references / interchanges with the following part numbers:
What does this ATP FO-36 seal do?
It is the O-ring that seals the joint where the automatic transmission dipstick/filler tube meets the transmission case, helping keep transmission fluid contained at that connection.
How do I know the tube seal needs replacing?
Look for automatic transmission fluid weeping or dripping around the base of the dipstick/filler tube. If a hardened or cracked tube seal is the cause, this part replaces it.
Does the FO-36 fit my vehicle?
It's listed for 144 year/make/model applications, including Ford, Mercury, Lincoln, Chevrolet, Geo and more. Check the Buyer's Guide tab to confirm your exact vehicle.
What number does this seal interchange with?
It cross-references to 391308S102. Matching that number to your original part helps confirm you're ordering the correct seal.
Is this a genuine ATP replacement part?
Yes. ATP transmission seals and gaskets are made as exact-fit, no-compromise replacement parts for the listed applications.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
