Transmission Oil Cooler

The Hayden LPD47391 is an extreme performance transmission oil cooler engineered to manage heat effectively in demanding automotive applications. Constructed from durable, brazed aluminum, this cooler incorporates advanced low-pressure drop technology to ensure optimal fluid flow while maximizing heat transfer. With a substantial BTU rating of 45,000, this cooler is capable of handling heavy loads and high operating temperatures, making it suitable for trucks and heavy-duty vehicles with a Gross Vehicle Weight (GVW) of up to 40,000 pounds. The cooler features 13 plates and has a cooling fin area measuring 8.5 x 22 x 1.25 inches, providing ample surface area for efficient cooling. This unit is noted as a direct replacement for the discontinued Tru-Cool 40K (LPD47391). It includes a basic installation kit with mounting brackets and barbed fittings. However, the included rubber hose and clamps are not recommended for long-term use, and it is advised to pair this cooler with a dedicated Tru-Cool 40k Line Kit for enhanced safety and more secure connections. For specific installations on 1988-1998 GMT400 trucks, a Notched Hood Latch Bracket may be necessary to allow for proper cooler mounting behind the grill.