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Dayco No Slack Automatic Belt Tensioners

4.33 out of 5 stars 33 Customer Reviews

Dayco No Slack automatic belt tensioners can resolve belt squeal, improper tracking, or an accessory that has stopped working completely. Featuring "flat spring" technology, these tensioners allow for an increase in torque to be transmitted to the belt when needed, compensating for stretch and wear, while maintaining constant tension throughout the life of your belt. They are built with tough, long-lasting cast aluminum housings and arms, steel locator pins, and arm plates. Engineered to outperform and outlast OEM parts, take up the slack with Dayco No Slack automatic belt tensioners.

All the results found for this search are Not In Stock.

Results 1 - 25 of 28

Dayco No Slack Automatic Belt Tensioners 89474

Dayco No Slack Automatic Belt Tensioners 89474

Accessory Belt Tensioners, No Slack Automatic Belt Tensioners, Smooth Pulley, Ford, Freightliner, Kenworth, Peterbilt, Each

Part Number: DAC-89474

Not Yet Reviewed

Estimated Ship Date: Mar 30, 2026 if ordered today

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Estimated Ship Date: Mar 30, 2026 if ordered today

Dayco No Slack Automatic Belt Tensioners 89446

Drive Belt Tensioner Assembly

Part Number: DAC-89446

Not Yet Reviewed

Estimated Ship Date: Mar 30, 2026 if ordered today

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Estimated Ship Date: Mar 30, 2026 if ordered today

Dayco No Slack Automatic Belt Tensioners 89930

AUTOMATIC BELT TENSIONER, HD, DAYCO

Part Number: DAC-89930

Not Yet Reviewed

Estimated Ship Date: Apr 2, 2026 if ordered today

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Estimated Ship Date: Apr 2, 2026 if ordered today

Dayco No Slack Automatic Belt Tensioners 89447

Drive Belt Tensioner, No Slack Automatic, Serpentine Style, Each

Part Number: DAC-89447

Not Yet Reviewed

Estimated Ship Date: Mar 30, 2026 if ordered today

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Estimated Ship Date: Mar 30, 2026 if ordered today

Dayco No Slack Automatic Belt Tensioners 89418

Drive Belt Tensioner Assembly

Part Number: DAC-89418

Not Yet Reviewed

Estimated Ship Date: Mar 30, 2026 if ordered today

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Estimated Ship Date: Mar 30, 2026 if ordered today

Dayco No Slack Automatic Belt Tensioners 89448

Drive Belt Tensioner Assembly, Kenworth, International, Peterbilt, Volvo, Western Star, Each

Part Number: DAC-89448

Not Yet Reviewed

Estimated Ship Date: Mar 30, 2026 if ordered today

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Estimated Ship Date: Mar 30, 2026 if ordered today

Dayco No Slack Automatic Belt Tensioners 89440

Drive Belt Tensioner Assembly, Freightliner, International, Each

Part Number: DAC-89440

Not Yet Reviewed

Estimated Ship Date: Mar 30, 2026 if ordered today

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Estimated Ship Date: Mar 30, 2026 if ordered today

Dayco No Slack Automatic Belt Tensioners 89430

Drive Belt Tensioner Assembly

Part Number: DAC-89430

Not Yet Reviewed

Estimated Ship Date: Mar 30, 2026 if ordered today

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Estimated Ship Date: Mar 30, 2026 if ordered today

Dayco No Slack Automatic Belt Tensioners 89442

Drive Belt Tensioner Assembly, International, Peterbilt, Each

Part Number: DAC-89442

Not Yet Reviewed

Estimated Ship Date: Mar 30, 2026 if ordered today

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Estimated Ship Date: Mar 30, 2026 if ordered today

Dayco No Slack Automatic Belt Tensioners 89439

Drive Belt Tensioner Assembly

Part Number: DAC-89439

Not Yet Reviewed

Estimated Ship Date: Mar 30, 2026 if ordered today

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Estimated Ship Date: Mar 30, 2026 if ordered today

Dayco No Slack Automatic Belt Tensioners 89419

Drive Belt Tensioner Assembly, Freightliner, Sterling, Western Star, Each

Part Number: DAC-89419

Not Yet Reviewed

Estimated Ship Date: Mar 30, 2026 if ordered today

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Estimated Ship Date: Mar 30, 2026 if ordered today

Dayco No Slack Automatic Belt Tensioners 89470

Drive Belt Tensioner Assembly

Part Number: DAC-89470

Not Yet Reviewed

Estimated Ship Date: Mar 30, 2026 if ordered today

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Estimated Ship Date: Mar 30, 2026 if ordered today

Dayco No Slack Automatic Belt Tensioners 89471

Drive Belt Tensioner Assembly

Part Number: DAC-89471

Not Yet Reviewed

Estimated Ship Date: Mar 30, 2026 if ordered today

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Estimated Ship Date: Mar 30, 2026 if ordered today

Dayco No Slack Automatic Belt Tensioners 89473

Drive Belt Tensioner Assembly, Peterbilt, Sterling, Volvo, Western Star, Each

Part Number: DAC-89473

Not Yet Reviewed

Estimated Ship Date: Mar 30, 2026 if ordered today

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Estimated Ship Date: Mar 30, 2026 if ordered today

Dayco No Slack Automatic Belt Tensioners 89484

AUTOMATIC BELT TENSIONER, HD, DAYCO

Part Number: DAC-89484

Not Yet Reviewed

Estimated Ship Date: Mar 30, 2026 if ordered today

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Estimated Ship Date: Mar 30, 2026 if ordered today

Dayco No Slack Automatic Belt Tensioners 89940

Accessory Drive Belt Tensioner Assembly

Part Number: DAC-89940

Not Yet Reviewed

Estimated Ship Date: Mar 30, 2026 if ordered today

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Estimated Ship Date: Mar 30, 2026 if ordered today

Dayco No Slack Automatic Belt Tensioners 89939

Accessory Drive Belt Tensioner Assembly

Part Number: DAC-89939

Not Yet Reviewed

Estimated Ship Date: Mar 30, 2026 if ordered today

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Estimated Ship Date: Mar 30, 2026 if ordered today

Dayco No Slack Automatic Belt Tensioners 89480

Drive Belt Tensioner Assembly

Part Number: DAC-89480

Not Yet Reviewed

Estimated Ship Date: Mar 30, 2026 if ordered today

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Estimated Ship Date: Mar 30, 2026 if ordered today

Dayco No Slack Automatic Belt Tensioners 89445

Drive Belt Tensioner Assembly

Part Number: DAC-89445

Not Yet Reviewed

Estimated Ship Date: Mar 30, 2026 if ordered today

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Estimated Ship Date: Mar 30, 2026 if ordered today

Dayco No Slack Automatic Belt Tensioners 89472

Drive Belt Tensioner Assembly

Part Number: DAC-89472

Not Yet Reviewed

Estimated Ship Date: Mar 30, 2026 if ordered today

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Estimated Ship Date: Mar 30, 2026 if ordered today

Dayco No Slack Automatic Belt Tensioners 89481

AUTOMATIC BELT TENSIONER, HD, DAYCO

Part Number: DAC-89481

Not Yet Reviewed

Estimated Ship Date: Mar 30, 2026 if ordered today

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Estimated Ship Date: Mar 30, 2026 if ordered today

Dayco No Slack Automatic Belt Tensioners 89497

AUTOMATIC BELT TENSIONER, HD, DAYCO

Part Number: DAC-89497

Not Yet Reviewed

Estimated Ship Date: Mar 30, 2026 if ordered today

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Estimated Ship Date: Mar 30, 2026 if ordered today

Dayco No Slack Automatic Belt Tensioners 89422

Drive Belt Tensioner Assembly

Part Number: DAC-89422

Not Yet Reviewed

Estimated Ship Date: Apr 1, 2026 if ordered today

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Estimated Ship Date: Apr 1, 2026 if ordered today

Need It Sooner? We recommend these similar substitute parts:

Dayco No Slack Idler Pulleys for 2002 CLASSIC, 1994 F-800 - 89105

Not Yet Reviewed

Estimated Ship Date: Monday 3/16/2026

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Dayco No Slack Automatic Belt Tensioners 89441

Drive Belt Tensioner Assembly, Bluebird, Thomas, Western Star, Each

Part Number: DAC-89441

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Apr 2, 2026 if ordered today

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Estimated Ship Date: Apr 2, 2026 if ordered today

Dayco No Slack Automatic Belt Tensioners 89421

Drive Belt Tensioner Assembly

Part Number: DAC-89421

Not Yet Reviewed

Estimated Ship Date: Apr 2, 2026 if ordered today

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Estimated Ship Date: Apr 2, 2026 if ordered today

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