Performance Drive Belt Tensioner Kit for Dodge Ram 2500 (2009-2010) 5.7L

Heavy-Duty Performance Drive Belt Tensioner Kit for 2009-2010 Dodge Ram 2500 (DJ/DH)

What it Does: The Performance Drive Belt Tensioner Kit stabilizes the front accessory drive system on the 2009-2010 Dodge Ram 2500 to prevent belt slip, eliminate parasitic drag, and ensure continuous operation of the alternator, water pump, and power steering under heavy loads.

The Stock Dodge Ram 2500 Accessory Drive Weakness

Under heavy towing and prolonged thermal cycles, the factory accessory drive on the DJ/DH platform experiences severe mechanical fatigue. The stock internal torsional spring inside the OEM tensioner loses damping rate over time, resulting in arm oscillation and dynamic belt flutter across the front end. Simultaneously, high underhood temperatures degrade the factory composite idler pulley bearings, causing runout, chirping, and pulley misalignment. When combined with belt stretching under high-RPM shifts on the 5.7L HEMI (Eagle) engine, the system suffers from alternator decouple slip and premature rib cracking.

The Engineering Solution

This direct replacement kit restores mechanical belt tension and radial alignment across all drive accessories. Featuring an upgraded cast-aluminum body, the heavy-duty tensioner houses a calibrated round-wire steel torsional spring engineered to resist thermal settling and dampen peak harmonic vibrations. The included idler pulley utilizes deep-groove, double-sealed ball bearings packed with high-temperature grease to resist contamination and high-load bearing degradation. Paired with a precision-molded 6PK2020 EPDM multi-rib serpentine belt, the system offers superior tensile strength and thermal crack resistance up to 250°F, eliminating belt squeal and slip during heavy load demands.

What's Included

• 1x Serpentine Belt (Part # 6PK2020)
• 1x Idler Pulley (Part # 38018)
• 1x Tensioner Assembly (Part # 38323)

Technical Specifications

Compatibility

• 2009 Dodge Ram 2500 5.7L V8 (ST, SLT, TRX, Laramie, Power Wagon)
• 2010 Dodge Ram 2500 5.7L V8 (ST, SLT, TRX, Laramie, Power Wagon)

Frequently Asked Questions & Fitment Warnings

Does this fit the DJ/DH Ram 2500?

Yes, this is a direct fit for the 2009-2010 Dodge Ram 2500 equipped with the 5.7L HEMI V8 engine. Does not fit 6.7L Cummins Turbo Diesel models or 6.4L V8 applications.

Are mounting bolts included with this tensioner assembly?

No, this direct-fit kit reuses the factory OEM mounting fasteners during installation.

The Dodge Truck Caliber

Built to withstand extreme payload and commercial towing requirements, this accessory drive system delivers structural reliability and zero-slip power transfer in severe duty cycles.