Details

• Brand:

  

  

• SKU:

  391308-S

• Other Names:

  Automatic Transmission Dipstick Tube O-Ring, Seal

• Description:

  This is the genuine Ford automatic transmission dipstick tube O-ring seal, about .556 by .103 inch, used on the 4R100 and a broad range of other Ford automatic transmissions. The fluoroelastomer O-ring seals the joint where the transmission dipstick and fill tube enters the case, keeping automatic transmission fluid contained and preventing a leak at that connection. A hardened, cut or flattened O-ring is a common cause of an ATF leak at the base of the dipstick tube, which leaves stains on the case and crossmember and, if neglected, can lower the fluid level enough to affect shifting. Replacing the seal restores a clean, leak-free tube connection. It is good practice to renew this O-ring whenever the dipstick tube is removed, since a disturbed seal rarely reseals reliably; lubricate the new O-ring with clean transmission fluid before installation, make sure the tube end and case bore are clean and undamaged, and seat the tube fully and squarely so the seal is not pinched or rolled. Top up the transmission fluid to the correct level afterward and check for leaks. Confirm your transmission and application against the VIN before ordering, since tube and seal sizes vary by unit. Genuine Ford construction ensures the seal matches the original size, cross-section and fluid-resistant material for a correct, durable seal.

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