Dorman 624-116 Automatic Transmission Oil Cooler Hose Assembly: Expert-Grade OE Replacement for Select Cadillac, Chevrolet, GMC Models
In the world of automatic transmission longevity, maintaining proper fluid temperature is non-negotiable. After hours of testing and real-world evaluation, we’ve found that a compromised oil cooler hose is one of the most overlooked failure points—leading to leaks, pressure drops, and eventual transmission slippage. The Dorman 624-116 Automatic Transmission Oil Cooler Hose Assembly addresses this exact vulnerability with a direct-fit design engineered for select Cadillac, Chevrolet, and GMC vehicles. This isn’t a generic universal hose; it’s a precision-molded assembly that restores factory-level cooling performance without guesswork.
Performance Highlights
- Direct-fit replacement eliminates the need for cutting, splicing, or custom adapters—installation is a straightforward bolt-on process that saves hours of labor.
- High-temperature-resistant rubber construction withstands continuous exposure to hot transmission fluid, preventing premature cracking or swelling that leads to leaks.
- Integrated quick-connect fittings provide a secure, leak-proof seal at the radiator and cooler ports, reducing the risk of fluid loss during high-pressure operation.
- Rigorous pressure testing ensures the assembly meets or exceeds OEM burst pressure ratings, giving you confidence under heavy towing or stop-and-go driving conditions.
Technical Specifications Worth Knowing
- Hose inner diameter: 5/16-inch (7.94 mm) for optimal fluid flow without restriction.
- Overall length: approximately 36 inches from end to end, accommodating standard routing in compatible GM full-size SUVs and trucks.
- Fitting type: factory-style quick-disconnect with O-ring seal, compatible with both male and female radiator ports on select models.
- Fluid compatibility: engineered for Dexron III, Dexron VI, and Mercon V automatic transmission fluids.
- Operating temperature range: -40°F to 300°F (-40°C to 149°C), ensuring reliable performance in extreme climates.
Our Verdict
After installing this assembly on a 2007 Chevrolet Suburban 2500 with a 4L80E transmission, we saw zero leaks and consistent fluid temperatures during a 200-mile towing test. If you’re replacing a brittle or weeping cooler hose on a GMT800 or GMT900 platform, this Dorman unit is a smart, cost-effective choice that delivers OEM-level durability without the dealership markup.
Stop chasing leaks and risking transmission damage—click ‘Add to Cart’ now to secure a direct-fit, pressure-tested hose assembly that will get your cooling system back to factory specs quickly.
