Dayco 15660 Accessory Drive Belt
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Dayco

Dayco 15660 Accessory Drive Belt

Brand Dayco 15660
Position Alternator and Air Conditioning
Angle 36
Belt Construction Top Cog
Color Black
Effective Length 66
Effective Length 1676.40
Material Synthetic Rubber Compound
Maximum Operating Temperature 79.4
Maximum Operating Temperature 175
Minimum Operating Temperature -37.2
Minimum Operating Temperature -35
Outside Circumference 66.57
Outside Circumference 1690.88
Standards SAE J636, SAE J637
Top Width .44
Fits Chrysler, Dodge, Plymouth, DeSoto, Oldsmobile, and Cadillac · 65 vehicles

Top-cog construction. Improves flexibility and smooth power transfer in accessory drive systems.

Synthetic rubber compound. Delivers durable belt performance with dependable wear resistance.

SAE J636, J637. Built to meet recognized belt performance standards.

Cross-references ACDelco 15660, Atlas 716 and Atlas 788 for the same application. See all 69.

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Dayco 15660 Accessory Drive Belt

The Dayco 15660 accessory drive belt is built for classic vehicle applications that need a precise, dependable belt profile. Made from a synthetic rubber compound with a top-cog construction, it is sized for accessory drive systems that use an alternator, air conditioning, or idler routing.

  • Synthetic rubber compound construction for accessory drive service
  • Top-cog belt design for flexible routing and consistent operation
  • Black finish with a 0.44 top width
  • 66 in effective length and 66.57 in outside circumference
  • 36-degree angle profile
  • Meets SAE J636 and SAE J637 standards
  • Operating temperature range: -35 to 175 degrees

Fitment and application details

Compatible with a wide range of Chrysler, Dodge, Cadillac, Oldsmobile, and Ford-era accessory drive setups, the Dayco 15660 is listed for 1975-1978 Chrysler New Yorker and Newport models with alternator and air conditioning or alternator and idler configurations, plus 1977-1978 Dodge D100, D200, D300, Ramcharger, W100, W200, and W300 applications with 100 amp alternator setups. It also covers earlier classic applications such as 1962-1966 Chrysler 300, 1966 Chrysler Imperial, 1961-1966 Chrysler Newport, 1966 Chrysler Town & Country, 1966 Dodge Charger, 1966 Dodge Monaco, 1961 Oldsmobile 98, 1959 Chrysler New Yorker, 1957 Oldsmobile 88, 1953-1956 Cadillac DeVille, 1953-1956 Cadillac Eldorado, and 1949 Cadillac Commercial Chassis. This part number, 15660, also cross-references ACDelco 15660 for the same application.

What this belt helps address

  • Slipping or noisy accessory drive operation
  • Incorrect belt length on alternator or A/C routing
  • Worn, cracked, or glazed belt surfaces
  • Loss of accessory drive performance from belt stretch
  • Fitment issues on classic Chrysler, Dodge, Cadillac, and Oldsmobile applications

Installation notes and quality

Verify belt routing, pulley alignment, and the required accessory configuration before installation. Confirm the vehicle’s alternator output and whether the application uses air conditioning or an idler arrangement, since those details affect fitment. Dayco 15660 is manufactured to SAE J636 and SAE J637 standards for accessory drive belt applications.

For search reference, Dayco 15660 is a direct-fit accessory drive belt for select Chrysler New Yorker, Dodge Monaco, and Cadillac DeVille-era applications.

Related reading

This part fits 65 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
1978ChryslerNew Yorker7.2LV8Alternator and Air Conditioningw/100 Amp Alt.
1978ChryslerNew Yorker7.2LV8Alternator and Idlerw/100 Amp Alt., w/o A.C.
1978ChryslerNewport7.2LV8Alternator and Air Conditioningw/100 Amp Alt.
1978ChryslerNewport7.2LV8Alternator and Idlerw/100 Amp Alt., w/o A.C.
1978DodgeMonaco7.2LV8Alternator and Air Conditioningw/100 Amp Alt.
1978DodgeMonaco7.2LV8Alternator and Idlerw/100 Amp Alt., w/o A.C.
1977ChryslerNew Yorker7.2LV8Alternator and Air Conditioningw/100 Amp Alt.
1977ChryslerNew Yorker7.2LV8Alternator and Idlerw/100 Amp Alt., w/o A.C.
1977ChryslerNewport7.2LV8Alternator and Air Conditioningw/100 Amp Alt.
1977ChryslerNewport7.2LV8Alternator and Idlerw/100 Amp Alt., w/o A.C.
1977ChryslerTown & Country7.2LV8Alternator and Air Conditioningw/100 Amp Alt.
1977ChryslerTown & Country7.2LV8Alternator and Idlerw/100 Amp Alt., w/o A.C.
1977DodgeD1007.2LV8Alternator and Air Conditioningw/100 Amp Alt.
1977DodgeD1007.2LV8Alternator and Idlerw/100 Amp Alt.
1977DodgeD2007.2LV8Alternator and Air Conditioningw/100 Amp Alt.
1977DodgeD2007.2LV8Alternator and Idlerw/100 Amp Alt.
1977DodgeD3007.2LV8Alternator and Air Conditioningw/100 Amp Alt.
1977DodgeD3007.2LV8Alternator and Idlerw/100 Amp Alt.
1977DodgeRamcharger7.2LV8Alternator and Air Conditioningw/100 Amp Alt.
1977DodgeRamcharger7.2LV8Alternator and Idlerw/100 Amp Alt.
1977DodgeW1007.2LV8Alternator and Air Conditioningw/100 Amp Alt.
1977DodgeW1007.2LV8Alternator and Idlerw/100 Amp Alt.
1977DodgeW2007.2LV8Alternator and Air Conditioningw/100 Amp Alt.
1977DodgeW2007.2LV8Alternator and Idlerw/100 Amp Alt.
1977DodgeW3007.2LV8Alternator and Air Conditioningw/100 Amp Alt.
1977DodgeW3007.2LV8Alternator and Idlerw/100 Amp Alt.
1976ChryslerNew Yorker7.2LV8Alternator and Air Conditioningw/100 Amp Alt.
1976ChryslerNewport7.2LV8Alternator and Air Conditioningw/100 Amp Alt.
1976ChryslerTown & Country7.2LV8Alternator and Air Conditioningw/100 Amp Alt.
1976DodgeMonaco7.2LV8Alternator and Air Conditioningw/100 Amp Alt.
1975ChryslerImperial——Alternator and Air Conditioningw/100 Amp Alt.
1975ChryslerNew Yorker7.2LV8Alternator and Air Conditioningw/100 Amp Alt.
1975ChryslerNewport7.2LV8Alternator and Air Conditioningw/100 Amp Alt.
1975ChryslerTown & Country7.2LV8Alternator and Air Conditioningw/100 Amp Alt.
1975DodgeMonaco7.2LV8Alternator and Air Conditioningw/100 Amp Alt.
1966Chrysler3006.3LV8Alternator and Air Conditioning—
1966Chrysler3007.2LV8Alternator and Air Conditioning—
1966ChryslerImperial——Alternator and Air Conditioning—
1966ChryslerNewport6.3LV8Alternator and Air Conditioning—
1966ChryslerNewport7.2LV8Alternator and Air Conditioning—
1966ChryslerTown & Country6.3LV8Alternator and Air Conditioning—
1966DodgeCharger5.9LV8Alternator and Air Conditioning—
1966DodgeCharger6.3LV8Alternator and Air Conditioning—
1966DodgeMonaco6.3LV8Alternator and Air Conditioning—
1965Chrysler3006.3LV8Alternator and Air Conditioning—
1965ChryslerNewport6.3LV8Alternator and Air Conditioning—
1964Chrysler3006.3LV8Alternator and Air Conditioning—
1964ChryslerNewport5.9LV8Alternator and Air Conditioning—
1963Chrysler3006.3LV8Alternator and Air Conditioning—
1963ChryslerNewport5.9LV8Alternator and Air Conditioning—
1962Chrysler3006.3LV8Alternator and Air Conditioning—
1962ChryslerNewport5.9LV8Alternator and Air Conditioning—
1961ChryslerNewport5.9LV8Alternator and Air Conditioning—
1961Oldsmobile98——Fan, Generator and Air Conditioning—
1959ChryslerNew Yorker——Air Conditioning and IdlerRight Bank
1957Oldsmobile88——Fan, Generator and Air Conditioning—
1956CadillacDeVille——Fan, Generator and Air Conditioning—
1956CadillacEldorado——Fan, Generator and Air Conditioning—
1955CadillacDeVille——Fan, Generator and Air Conditioning—
1955CadillacEldorado——Fan, Generator and Air Conditioning—
1954CadillacDeVille——Fan, Generator and Air Conditioning—
1954CadillacEldorado——Fan, Generator and Air Conditioning—
1953CadillacDeVille——Fan, Generator and Air Conditioning—
1953CadillacEldorado——Fan, Generator and Air Conditioning—
1949CadillacCommercial Chassis——Fan, Generator and Air Conditioning—
Directly replaces or cross-references 69 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
ACDelco — 15660Atlas — 716Atlas — 788Atlas — 5660Autopar — FB15660CARQUEST — 7660Chief — 13660Chrysler — 2658354Chrysler — 2658355Chrysler — 3671516Chrysler — 3671517Chrysler — 4027345Chrysler — 4027346Chrysler — 4027347Chrysler — 4027348Chrysler — 4106226Conoco — AB315Driveworks — 66013Duralast — 15660Dynacraft — D1102-2097Dynacraft — D1102-2111Ford — F1HT-8620-GBFord — F1HZ-8620-EFreshstart — 13660Gates — 10A1675Gates — 7660Gates — 7664Gates — 8233Gates — 8355General Motors — 3769232General Motors — 3769233Goodyear — 13661Goodyear — 13665John Deere — AR46970Lazorlite — L37-1675Mighty Distributing System — 15660Mitsuboshi — MF1660Mopar — B0013661Mopar — B13655AMopar — B13661Mopar — B13661AMopar — B13665AMopar — BH262Mopar — BH262AMotorcraft — JB-666Motorcraft — JB-667NAPA — 25-7660NAPA — 25-16753Navistar — 358343-C91Navistar — 358998-C91Navistar — 861846-K21Navistar — 861846-R2Navistar — 861846-R22Navistar — 968815-K2Navistar — 968815-K31Navistar — 968815-R1Navistar — 968815-R2Navistar — 968815-R3Optibelt — 9.5X1675Pirelli — 13-662Power Plus — 2660Texaco — 15-660Texaco — 448Uniroyal — 13600Uniroyal — 13660Uniroyal — 13661V&W — 66013Versatile — V62956White — 20804-5069