Rear Diff Fill Tank 10an w/Vented Cap

The KEVKO OIL PANS & COMPONENTS Rear Diff Fill Tank 10AN with Vented Cap is a purpose-built aluminum reservoir designed for applications requiring controlled fluid servicing of rear differential assemblies. This vented filler tank integrates a 10 AN outlet connection and natural aluminum construction, offering a compact, durable solution for vehicles where space constraints or modified suspension geometry demands an external fill reservoir rather than factory-integrated filler access.

The 10 AN outlet specification ensures compatibility with -10 AN hose and fitting systems commonly found in high-performance and racing applications, where precision plumbing and reliable pressure containment are critical. The vented cap design prevents vacuum lock during fluid transfer and maintains atmospheric pressure equilibrium within the tank, a practical necessity when differential oil levels fluctuate due to aggressive driving or load changes. Constructed from aluminum, the tank balances weight savings with structural integrity while the natural finish simplifies custom fabrication and integration into engine bay or chassis setups.

This component serves drag racing, off-road competition, and street performance builds where modified chassis geometry or aftermarket differential housings eliminate convenient factory fill ports. Universal fitment design allows builders to position the tank wherever packaging permits, making it ideal for custom fabrication work, race car preparation, and high-horsepower street vehicles. The compact footprint—6.5 by 3.15 by 10.75 inches—fits tight engine compartments while weighing just 1.13 pounds, minimizing vehicle weight while maintaining adequate capacity for fluid service intervals.