Product Description
Cummins 3929027 OEM Crankshaft Gear – Ram 5.9L (1989–2002)
The Cummins 3929027 OEM Crankshaft Gear is a genuine Cummins timing gear designed for 1989–2002 Dodge Ram trucks equipped with the legendary 5.9L Cummins diesel engine. Manufactured to original equipment specifications, this hardened steel crankshaft gear ensures precise synchronization between the crankshaft, camshaft, and injection pump, helping maintain proper engine timing, reliability, and long-term durability.
Whether you are performing a complete engine rebuild, replacing worn timing components, or restoring factory timing accuracy, the Cummins 3929027 crankshaft gear provides the exact fit and performance expected from a genuine OEM Cummins part. Replacing worn timing gears can help prevent excessive gear train noise, timing drift, and premature component wear.
Features
- Genuine Cummins OEM crankshaft timing gear
- Direct replacement for factory-installed crankshaft gear
- Precision-machined hardened steel construction
- Maintains accurate camshaft and injection pump timing
- Helps reduce gear train noise and timing-related wear
- Designed to Cummins OEM specifications
- Ideal for engine rebuilds and timing system repairs
- Provides long service life and dependable operation
- Direct-fit installation when used with proper service procedures
Fitment
- 1989–1993 Dodge Ram 2500 and 3500 with 5.9L Cummins 12-Valve (6BT)
- 1994–1998 Dodge Ram 2500 and 3500 with 5.9L Cummins 12-Valve (6BT)
- 1998.5–2002 Dodge Ram 2500 and 3500 with 5.9L Cummins 24-Valve ISB
- Cummins 5.9L B-Series industrial applications requiring part number 3929027
Note: Fitment for industrial, agricultural, marine, and off-highway applications should always be verified using the engine serial number (ESN). The crankshaft gear is installed as an interference fit and proper installation procedures should be followed.
What's Included
- Cummins 3929027 OEM Crankshaft Gear
Specifications
- Manufacturer: Cummins Genuine Parts
- Part Number: 3929027
- Component Type: Crankshaft Timing Gear
- Material: Hardened Steel
- Installation Type: Press-Fit / Interference Fit
- Engine Family: Cummins B-Series
- Engine Compatibility: 5.9L 6BT and ISB Cummins
- Application: Timing Gear Train System
- OEM Replacement: Yes
- Fitment Years: 1989–2002 Dodge Ram 5.9L Cummins
- Shipping Weight: Approximately 1.2 lbs
- Package Dimensions: Approximately 4 x 4 x 1 inches
Cross Reference Numbers
3929027, 3901258, 3918375, 3912883, 3919681, J901258, J929027
FAQ
Does the Cummins 3929027 fit both 12-valve and 24-valve 5.9L Cummins engines?
Yes. The Cummins 3929027 crankshaft gear is commonly used on both 12-valve and 24-valve 5.9L Cummins engines found in Dodge Ram trucks from 1989 through 2002.
Should the crankshaft gear be replaced during an engine rebuild?
Yes. Replacing worn timing gears during a rebuild helps maintain proper timing accuracy, reduce backlash, and prevent excessive gear train noise.
Can I reuse my original crankshaft gear?
Reusing the original gear is not recommended if there is visible wear, pitting, tooth damage, rounding, or evidence of looseness. Damaged timing gears can lead to timing inaccuracies and premature wear of related components.
Is the Cummins 3929027 an OEM Cummins part?
Yes. The 3929027 is a genuine Cummins replacement component manufactured to original equipment specifications for proper fit and performance.
How is the crankshaft gear installed?
The gear is installed onto the crankshaft using an interference-fit design. Proper installation tools and service procedures should be used to ensure correct fitment and alignment.
