Details

• Brand:

  

  

• SKU:

  390943-S101

• Other Names:

  Differential Drain Plug, Plug Transmission Oil Level

• Description:

  This Genuine Ford part 390943-S101 is a threaded transmission oil level plug, listed in the Ford parts catalog under the description Plug - Transmission Oil Level and also referenced as a Drain Plug. It threads into the checking, fill or drain port of the transmission case, and on many chassis the same standardized plug is used at the axle and differential housing, where it seals the opening against fluid weepage while allowing the port to be opened for checking or changing the lubricant. Because it is generic Ford service hardware, it carries an unusually wide fitment spanning roughly 1980 through 2008 across Ford, Lincoln and Mercury, including Aerostar, Bronco and Bronco II, Crown Victoria, E-150, E-250 and E-350 vans, Escape, Excursion, Expedition, F-150 and Ranger, along with Lincoln Aviator, Mark VI and Navigator and Mercury Bobcat, Capri and Mariner, which is why it is presented as a multi-vehicle listing rather than tied to one model and year. A buyer typically needs this plug when the original is leaking past its threads or seal, has been rounded off or cross-threaded during a fluid service, is seeping at the case or axle, or has gone missing, any of which can let lubricant escape and drop the fluid level. It supersedes and replaces the earlier 390943-S100. Clean the threads before installing, seat the plug squarely, and tighten it to the factory torque so it seals without distorting the port.

• Replaces:

  390943s100

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