Trans Cooler Adapter Fitting GM 6L80E

The Trans Cooler Adapter Fitting GM 6L80E by EARLS is a precision transmission cooling line connector engineered for builders upgrading or servicing modern GM 6-speed automatic transmissions. This straight-fitting adapter serves as the critical interface between transmission coolers and OEM or aftermarket cooling systems, making it essential for anyone tackling high-performance builds, heavy-duty towing setups, or factory transmission maintenance on 6L80/6L90-equipped vehicles.

Constructed from aluminum and finished in black anodized coating, this adapter features a 6 AN male port that delivers superior corrosion resistance and a professional appearance in any engine bay. The straight configuration eliminates unnecessary bends in cooling lines, reducing turbulence and pressure loss while minimizing heat soak in transmission fluid—critical for vehicles experiencing sustained load or elevated ambient temperatures. EARLS' manufacturing precision ensures leak-free seals and compatibility with industry-standard AN fittings, making integration with braided stainless steel cooler lines or factory radiator transmission lines seamless and reliable.

Mechanics and performance enthusiasts restoring, upgrading, or rebuilding 6L80E and 6L90 transmissions rely on this fitting to establish proper cooling flow without compromise. Whether you're installing an external cooler, relocating cooling lines during an engine swap, or diagnosing factory transmission temperature issues, this adapter ensures dependable operation under sustained power delivery. The compact 2.25 x 2.15 x 4.9 inch footprint and lightweight 0.12 lbs design make installation straightforward in tight engine compartments while supporting both street and track applications demanding consistent transmission temperatures.