The 13790 is a 12v 136 amp alternator, a new aftermarket direct replacement engineered to match the fit, form, and function of the original alternator. Specifications: - Voltage: 12V - Output: 136 amp - Rotation: Clockwise (CW) Vehicle Compatibility: - Makes: Dodge, Jeep (1999-2000) - Models include: Dodge Durango; Jeep Grand Cherokee; Dodge Dakota - Confirm exact fitment with your year, make, and model before ordering. Cross-Reference / Interchange Numbers: - Replaces / compatible with: 121000-3650, 121000-4250, 121000-4251, 121000-4400, 13777N, 13790, 13880, 1N8641, 1N8645, 211-0116 (plus 12 more on file). Why ePartsGlobal: specialist in heavy-duty starters, alternators, and charging-system electrical parts. Backed by a 1-year warranty, free shipping on orders over $19.95, and fast fulfillment. Ships from USA.