4R100

Cooler Bypass Valve

Removal
1. Raise and support the vehicle.





2. Remove the front cooler tube, from the front Cooler Bypass Valve (CBV) fitting.





3. Remove the rear cooler tube from the rear CBV fitting.





4. NOTE: The two rubber coated sealing washers can fall out during removal of the front line case fitting.

Remove the front case fitting.





5. NOTE: The two rubber coated sealing washers can fall out during removal of the rear line case fitting.

Remove the rear line case fitting.
6. Remove and clean the CBV.

Installation





1. CAUTION: Failure to correctly install the new rubber-coated sealing washers will result in transmission fluid leaks.

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 fitting into their respective ends of the CBV assembly.
3 Install one rubber-coated sealing washer on each cooler line case fitting.





CAUTION: Make sure the Cooler Bypass Valve (CBV) is correctly backflushed. Use dry compressed air to remove solvent.

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.

Install the cooler line case fitting.





3. Tighten the cooler tube nuts.
4. Lower the vehicle.
5. Fill the transmission to the specified level with clean automatic transmission fluid.