Wilson 90-01-4270 Alternator

Wilson 90-01-4270 Remanufactured Alternator

The Wilson 90-01-4270 is a remanufactured 12-volt alternator built for charging-system service where dependable output matters. With 145 amps, J180 mount type, and a 22SI series design, it is a direct-fit electrical replacement for applications using a DELCO REMY OE unit.

Key Features

• 145 amp output for steady charging performance
• 12-volt alternator for standard vehicle electrical systems
• 22SI series design with J180 mount type
• IR/EF configuration with 12:00 plug clocking
• Remanufactured to Wilson standards with teardown, cleaning, reassembly, and testing
• OE unit reference: DELCO REMY

Product Details

Wilson remanufactured alternators are processed beyond a basic rebuild. Each unit is fully disassembled, cleaned, reassembled with components selected to Wilson’s standards, and tested to meet and exceed OE specifications. That approach supports reliable charging performance for vehicles and equipment that depend on consistent uptime. The 90-01-4270 is a strong match for charging-system repairs where the original alternator uses a 22SI platform, 145 amp output, and J180 mounting arrangement. This part cross-references Delco Remy applications such as 10459189 and 3675240 for the same application.

What It Helps Fix

• Battery warning light caused by alternator output loss
• Low-voltage charging complaints during idle or load
• Dim lights, slow cranking, or intermittent electrical operation
• Charging-system failure after wear in the original unit
• Replacement needs for DELCO REMY-style 22SI alternator applications

Installation Notes and Tips

Verify the existing alternator’s 22SI series, J180 mount type, 12-volt system, 145 amp rating, and 12:00 plug clocking before installation. Confirm the IR/EF design and OE reference match the original unit on the vehicle or equipment. For vehicle-specific search use, this alternator is commonly referenced in Ford F-Series and Chevrolet/GMC medium-duty charging-system applications where the original setup matches these specifications. Fits 2006-2011 Ford F-Series, charging-system applications with matching alternator specifications. Fits 2006-2011 Chevrolet/GMC medium-duty applications, charging-system applications with matching alternator specifications.

Quality Assurance

Wilson remanufactured alternators are tested after reassembly to help ensure they meet OE-level performance expectations. The remanufacturing process is designed to restore dependable charging output for service replacement use.