Product Description
Cummins 3929028 OEM Camshaft Gear – Ram 5.9L 12V (1989–2000)
The Cummins 3929028 OEM Camshaft Gear is a genuine factory replacement timing gear designed for 1989–2000 Dodge Ram trucks equipped with the legendary 5.9L 12-Valve Cummins engine. Responsible for transferring crankshaft rotation to the camshaft, this precision-machined gear maintains accurate valve timing, injection timing, and overall engine synchronization for reliable performance and long engine life.
Manufactured to Cummins OEM specifications, the 3929028 camshaft gear is heat-treated and engineered for durability within the gear-driven timing system found in the 12-Valve 6BT engine. Whether you're performing a complete engine rebuild, replacing a worn timing component, or installing a new camshaft, the Cummins 3929028 provides the factory fit, reliability, and timing accuracy your engine was designed to deliver.
Features
- Genuine Cummins OEM camshaft gear
- Direct replacement for factory-installed camshaft gear
- Maintains proper valve and injection timing
- Precision-machined to Cummins specifications
- Heat-treated for long-term durability
- Designed for gear-driven 5.9L 12-Valve timing systems
- Ideal for engine rebuilds and timing system service
- Compatible with stock and performance camshaft installations
- OEM fit and function
- Built for long service life and reliable operation
Fitment
- 1989–1993 Dodge D250 with 5.9L 12-Valve Cummins
- 1989–1993 Dodge D350 with 5.9L 12-Valve Cummins
- 1989–1993 Dodge W250 with 5.9L 12-Valve Cummins
- 1989–1993 Dodge W350 with 5.9L 12-Valve Cummins
- 1994–1998 Dodge Ram 2500 with 5.9L 12-Valve Cummins
- 1994–1998 Dodge Ram 3500 with 5.9L 12-Valve Cummins
- Select Industrial Cummins 6BT applications
Note: Always verify fitment by engine serial number (ESN), especially for industrial, agricultural, marine, and off-highway applications.
What's Included
- Cummins 3929028 OEM Camshaft Gear
Specifications
- Manufacturer: Cummins Genuine Parts
- Part Number: 3929028
- Component Type: Camshaft Timing Gear
- Engine Platform: Cummins 5.9L 12-Valve (6BT)
- Timing System: Gear Driven
- Material: OEM Heat-Treated Steel
- Installation Type: Press-Fit Camshaft Gear
- Timing Mark: Factory Timing Reference Included
- Application: Camshaft and Timing System Service
- Engine Compatibility: 1989–2000 Cummins 5.9L 12V Applications
- Approximate Shipping Weight: 3–4 lbs
- OEM Replacement: Yes
Cross Reference Numbers
3929028, 3902235, 3907431, 3912884, 3929030
FAQ
What does the Cummins 3929028 camshaft gear do?
The camshaft gear transfers rotation from the crankshaft to the camshaft, ensuring proper valve timing and synchronization throughout the engine's operating cycle.
Is this the correct cam gear for a 12-Valve Cummins?
Yes. The Cummins 3929028 is commonly used on 1989–2000 5.9L 12-Valve Cummins engines. Always verify fitment using your engine serial number before ordering.
Should I replace the camshaft gear during a camshaft installation?
Many engine builders and camshaft manufacturers recommend replacing the cam gear during camshaft installation to ensure proper tooth engagement, timing accuracy, and long-term reliability.
Does this gear have factory timing marks?
Yes. The OEM gear includes factory timing references for proper installation and alignment during engine assembly.
Is this a genuine Cummins part?
Yes. Part number 3929028 is a genuine Cummins OEM camshaft gear manufactured to factory specifications.
Will this fit industrial 6BT engines?
Many industrial 6BT applications use this gear, but compatibility should always be confirmed using the engine serial number and CPL information.
