This tube carries pressurized transmission fluid out to the auxiliary cooler on diesel trucks, where the extra cooling capacity is what keeps fluid temperature in range while towing. The tubes corrode from the outside in and chafe where they pass brackets, and a leak here dumps fluid fast because it is on the pressure side.

Mopar Accessories 52028732AC Auxiliary Oil Cooler Pressure Tube Features:

• Fits select Dodge Ram 2500 and 3500 trucks with the 5.9L turbo diesel.
• For trucks with the 47RE four-speed automatic transmission.
• Feeds the auxiliary transmission oil cooler on the pressure side.
• Pre-formed to the factory routing. Genuine Mopar tube.