Dayco 15680 Accessory Drive Belt

Dayco 15680 Accessory Drive Belt Overview

The Dayco 15680 accessory drive belt is a top-cog, synthetic rubber compound belt built for accessory drive systems that need consistent grip and stable operation. With a 68-inch effective length and 68.57-inch outside circumference, it is a direct-fit option for select Chrysler, Dodge, Pontiac, Oldsmobile, and related classic applications.

Use this belt when servicing vehicles such as the Chrysler 300, Chrysler Imperial, Dodge Monaco, Pontiac GTO, and Oldsmobile 98. The Dayco 15680 is sized for specific alternator, air conditioning, air pump, generator, and fan drive layouts.

Key Features

• Part number: Dayco 15680
• Synthetic rubber compound construction for accessory drive service
• Top-cog design for improved flexibility in belt routing
• Top width: 0.44 in.
• Effective length: 68 in. (1727.20 mm)
• Outside circumference: 68.57 in. (1741.68 mm)
• Operating temperature range: -35°F to 175°F
• Meets SAE J636 and SAE J637 standards
• Black finish

Detailed Description

The Dayco 15680 accessory drive belt is engineered for classic accessory drive belt system applications where correct length, width, and profile are critical. Its top-cog construction helps the belt flex around pulleys in multi-accessory routing, while the synthetic rubber compound supports dependable operation across a wide temperature range. This belt is listed for positions including alternator and air conditioning, air pump, air conditioning and alternator, fan, generator and air conditioning, and generator and air suspension compressor.

Fitment includes 1960-1966 Chrysler New Yorker, 1963-1965 Chrysler 300, 1960-1963 Chrysler Imperial, 1964 Chrysler Newport, 1965 Dodge Monaco, 1966 Dodge Monaco, 1966 Pontiac GTO, 1966 Pontiac LeMans, 1966 Pontiac Tempest, 1953-1956 Oldsmobile 88, 1954-1956 Oldsmobile 88, 1958-1960 Oldsmobile 98, and 1959 Chrysler Imperial. This part cross-references Gates 10A1725 and NAPA 25-7680 for the same application.

What This Belt Helps Address

• Squealing or slipping accessory drive belt operation
• Incorrect belt length on alternator or air conditioning drives
• Worn or cracked belt material in classic vehicle service
• Poor belt tracking in top-cog routing applications
• Accessory drive performance issues on vintage Chrysler, Dodge, Pontiac, and Oldsmobile models

Installation Notes and Tips

• Verify belt length, width, and pulley routing before installation.
• Confirm the vehicle’s accessory layout, since listed applications include different positions and configurations.
• Inspect pulleys, tensioners, and accessory brackets for wear before installing a new belt.
• Use the exact fitment listing for your year, make, model, and position; for example, Fits 1963-1965 Chrysler 300, Alternator and Air Conditioning.
• For 1966 Pontiac GTO, LeMans, and Tempest, the listing applies to air pump applications without air conditioning.

Quality Assurance

Dayco manufactures this belt to SAE J636 and SAE J637 standards, supporting consistent dimensional and performance requirements for accessory drive service. The Dayco 15680 is built for direct replacement use in confirmed applications such as Chrysler 300, Chrysler Imperial, Dodge Monaco, Pontiac GTO, and Oldsmobile 98.