Hayden 397 Automatic Transmission Oil Cooler Line Connector

Transmission Oil Cooler Line Connector Kit

Hayden Cooler Inst.Kit 397 is an automatic transmission oil cooler line connector kit for vehicles using universal inlet and outlet connections. It is a performance-rated fitting kit with a round connector shape and a compact 0.750 in. outside diameter for transmission cooler line service.

Use this Hayden 397 fitting kit when servicing transmission oil cooler line connections on a wide range of GM, Chrysler, Buick, Cadillac, Chevrolet, and GMC applications. It is listed for vehicles such as the Chevrolet Silverado, GMC Sierra, and Cadillac Escalade, including models with snap-in transmission line fittings and applications calling for a 5/8"-18 thread inverted flare.

• Brand: Hayden Cooler Inst.Kit
• Part number: 397
• Automatic transmission oil cooler line connector kit
• Universal inlet and outlet gender
• Round connector shape
• Performance rated
• Fitting kit style for transmission service
• 0.750 in. outside diameter

Product Details

This transmission line fitting kit is built for cooler line connection service where the original connector style has worn, leaked, or no longer seals correctly. The Hayden Cooler Inst.Kit line focuses on transmission cooling hardware, and part 397 is listed across a broad range of late-model and earlier GM platforms, plus select Chrysler applications. Cross-reference part numbers include Four Seasons 53024 and Gates 18440 for the same application.

Common Uses

• Repairing a leaking automatic transmission oil cooler line connector
• Replacing a damaged snap-in or inverted-flare style transmission fitting
• Restoring secure transmission cooler line attachment after corrosion or wear
• Addressing fluid loss at the transmission cooler line connection
• Servicing cooler line connections on Chevrolet Silverado, GMC Sierra, and Cadillac Escalade applications

Installation Notes

Verify the transmission line connection style before installation. Fitment includes vehicles with snap-in transmission line fittings and vehicles with 5/8"-18 thread inverted flare connections, depending on application. Confirm the year, make, model, and cooler line configuration against the vehicle listing before ordering. Fits 2012-2015 Chevrolet Silverado 1500, N/A; Fits 2007-2015 GMC Sierra, N/A; Fits 2007-2012 Cadillac Escalade, N/A.

Quality Assurance

Hayden identifies this part as performance rated for transmission service. Part number 397 is cataloged as an automatic transmission oil cooler line connector kit and is cross-referenced to established aftermarket numbers for the same application.