8an Trans Fittings (2pk) GM TH350/TH400/700R4

The 8AN Trans Fittings (2pk) GM TH350/TH400/700R4 from Russell are precision adapter fittings engineered for transmission builders, hot rodders, and restoration specialists working with classic General Motors automatic transmissions. These straight-port adapters bridge the gap between modern -8 AN (1/2-inch) braided hose systems and legacy transmission cooler ports, making them essential for custom cooling system upgrades, engine swaps, and modernized fluid circulation on vehicles running three-speed, four-speed, and overdrive GM powerglide units. Whether you're installing an external transmission cooler, upgrading to a remote filter-king setup, or fabricating a custom cooling circuit, this two-pack delivers the adapters needed to create leak-free, professional-grade connections.

Each fitting in this pair features 8 AN male threads on one end and 1/4-inch NPSM (National Pipe Straight Mechanical) male threads on the other, allowing direct bolt-on compatibility with factory transmission port dimensions. Manufactured from lightweight aluminum and finished in durable black anodized coating, these adapters resist corrosion and oxidation in high-heat engine bay environments while maintaining structural integrity under sustained system pressures. The straight-port design eliminates flow restrictions at transition points, critical for maintaining consistent ATF delivery rates and preventing thermal buildup in TH350, TH400, and 700R4 transmissions during sustained driving or competition use.

Professional builders and DIY enthusiasts favor Russell adapters for their precision engineering and reliable performance across rebuild cycles and high-mileage applications. Installation requires basic mechanical knowledge—thread adapters into transmission ports using appropriate wrench sizes and thread-locking compound to ensure permanent seating, then connect modern -8 AN hose and fittings to complete your cooling system circuit. This two-pack covers both cooler inlet and outlet connections on a single transmission, making it the economical choice for complete system modernization on Chevy, Pontiac, and Oldsmobile platforms.