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Cooler Bypass Valve - 4R100 Transmission: Installation

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    CAUTION: Failure to correctly install the new rubber-coated sealing washers will result in transmission fluid leaks.
  1. Install new rubber-coated sealing washers and new cooler line case fittings.
    1. Install one rubber-coated sealing washer on each cooler line case fitting.
    2. Install both cooler line case fittings into their respective ends of the CBV assembly.
    3. Install one rubber-coated sealing washer on each cooler line case fitting.
      Fig 1: Installing One Rubber-Coated Sealing Washer On Each Cooler Line Case Fitting
      G03404912Courtesy of FORD MOTOR CO.
  2. CAUTION: If the cooler line case fitting is over-tightened the rubber coated sealing washers and/or cooler line case fittings can be damaged, causing a transmission fluid leak.
    NOTE: The CBV has a check ball in the rear fitting and will only allow flow in one direction. Make sure check ball moves freely.
    NOTE: Align the two rubber coated sealing washers, while assembling the rear CBV fitting.
    Fig 2: Installing CBV Onto Transmission Case
    G03404913Courtesy of FORD MOTOR CO.
  3. Install the CBV onto the transmission case.
  4. Install the transmission fluid cooler tube nuts.
    Fig 3: Installing Transmission Fluid Cooler Tube Nuts
    G03404914Courtesy of FORD MOTOR CO.
  5. Fill the transmission to the specified level with clean automatic transmission fluid.