Gates 39120 belt tensioner for the 2011-2012 Ram 1500 V6 3.7L, the 2011-2013 1500 V8 4.7L and other vehicles holds the V-ribbed accessory belt at steady tension. This Gates belt tensioner is also called a serpentine belt tensioner.
- DriveAlign automatic belt drive tensioner
- Patented labyrinth seal that protects the internal components
- Patented vibration-damping system that absorbs extreme vibration to extend tensioner, belt and accessory life
- Torsional round spring design for reliability and consistent tension
Quick facts
- Part: Gates 39120 belt tensioner
- Also called: serpentine belt tensioner
- Fits: 2011-2012 Ram 1500 V6 3.7L, the 2011-2013 1500 V8 4.7L and other vehicles
- Material: Thermoplastic
- Condition: New
A squealing or chirping belt, uneven belt wear or a pulley with visible play can mean the tensioner is wearing out. A stretched belt, a noisy idler pulley or a worn alternator bearing can be behind those signs too, so find which one is at fault before you buy.
Fits
This belt tensioner is a direct-fit replacement for the 2002-2010 Dodge Ram 1500 V6 3.7L or V8 4.7L, the 2004-2009 Jeep Grand Cherokee V8 4.7L and the 2005-2010 Grand Cherokee V6 3.7L, and each engine takes one.
Specifications
Fit and size
- Quantity per vehicle: 1
- Pulley quantity: 2
- Pulley outside diameters: 76 mm (2.99 in) each
- Pulley 1 width: 26 mm (1.02 in)
- Pulley 2 width: 27 mm (1.06 in)
- Bearing bore inside diameter: 17 mm (0.67 in)
- Mounting hole quantity: 1
Build and materials
- Material: Thermoplastic
- Belt type: V-ribbed
- Contact surface: smooth/backside, V-ribbed grooved
- Pulley 1: no grooves, not flanged
- Pulley 2: 6 grooves, flanged
- Grade type: OE Performance
- Condition: New
- Country of origin: Mexico
In the box
One belt tensioner assembly and one bolt.
Interchange: 419-008 · 419-010
53030958AC · 53030958AD · 53030958AE · 53030958AG · 68045800AA · 305395 · 89395 · 49464 · 999445A · 999445 · DG1413166
This part cross-references / interchanges with the following part numbers:
39120, 53030958AC, 53030958AD, 53030958AE, 53030958AG, 68045800AA, 305395, 89395, 419-008, 419-010, 49464, 999445A, 999445, DG1413166
Frequently Asked Questions
Is this the right belt tensioner for the 2004-2009 Jeep Grand Cherokee V8 4.7L?
Yes. Gates 39120 fits the 2004-2009 Jeep Grand Cherokee V8 4.7L and the 2005-2010 Grand Cherokee V6 3.7L. For any other car, look it up in the "Vehicles it fits" section on this page.
Is this the right belt tensioner for the 2011-2013 Ram 1500 V8 4.7L?
Yes. Gates 39120 fits the 2011-2013 Ram 1500 V8 4.7L, and it also fits the 2011-2012 Ram 1500 V6 3.7L.
What are the pulley sizes on this Gates drive belt tensioner?
Both pulleys are 76 mm (2.99 in) across. Pulley 1 is 26 mm wide, pulley 2 is 27 mm wide with 6 grooves and a flange, and the bearing bore is 17 mm.
Does the Gates 39120 come with its bolt?
Yes. The belt tensioner comes as an assembly with one bolt.
What signs can a worn Gates 39120 belt tensioner show?
Belt squeal or chirp, uneven belt wear and a pulley with visible play can all mean the tensioner is wearing out. Look with the engine off and cool; a shop can test belt tension.
