Onix OR2291 Radiator

Radiator for Ram Truck Cooling Service

The Onix OR2291 radiator is a direct-fit cooling replacement for select Dodge Ram trucks and Ramcharger applications with a 12 in. transmission oil cooler. It is built for drivers replacing a leaking, clogged, or damaged radiator while keeping the factory cooling layout intact.

• Compatible with 1998-2002 Dodge Ram 1500, w/ 12 in. TOC (Transmission Oil Cooler)
• Compatible with 1998-2002 Dodge Ram 2500, w/ 12 in. TOC (Transmission Oil Cooler)
• Compatible with 1998-2002 Dodge Ram 3500, w/ 12 in. TOC (Transmission Oil Cooler)
• Compatible with 1999-2001 Dodge Ramcharger, w/ 12 in. TOC (Transmission Oil Cooler)
• Onix drop-in-fit radiator line for straightforward replacement
• Engineered with premium components for longer service life and consistent cooling performance

Detailed Product Overview

Onix OR2291 is a radiator replacement for Dodge Ram 1500, Ram 2500, Ram 3500, and Ramcharger models equipped with a 12 in. transmission oil cooler. The design follows the factory cooling configuration, making it a practical choice for restoring heat transfer efficiency in trucks that show signs of overheating, coolant loss, or internal radiator wear. The OR2291 part number is also useful when searching for a radiator for 1998-2002 Dodge Ram 1500, Ram 2500, or Ram 3500 with the specified cooler setup.

Onix positions this radiator within its drop-in-fit product line, using upgraded components intended to deliver dependable performance in everyday service. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Repair Uses

• Fixes coolant leaks from a cracked or corroded radiator core
• Restores cooling performance after overheating concerns
• Replaces a restricted radiator that reduces heat dissipation
• Addresses transmission cooler-related radiator service on Ram trucks
• Supports repair of aging factory cooling systems on high-mileage vehicles

Installation Notes

Verify the vehicle has a 12 in. transmission oil cooler before ordering. Confirm radiator dimensions, hose connections, and mounting points against the original unit before installation. Flush the cooling system, inspect hoses and clamps, and refill with the correct coolant mixture after installation. For best results, check for related wear in the thermostat, water pump, and cooling fan system during service.

Quality Assurance

Onix designs its radiator line with upgraded components and a drop-in-fit approach to support reliable service life and consistent cooling performance. Part number OR2291 is built for the listed Dodge Ram and Ramcharger applications with the specified transmission oil cooler configuration.