Product Description
Interstate-McBee M-3904849 P7100 Timing Pin Retainer Ring – 94–98 5.9L Cummins 12V
The Interstate-McBee M-3904849 is the OEM-style timing pin retainer ring (star retainer) that secures the engine timing pin in the timing cover/gearcase on 1994–1998 5.9L Cummins 12-valve (P7100) applications. Built to OEM dimensions for reliable retention and long service life.
- Direct-fit replacement: Matches Cummins 3904849 for proper fit and function.
- Durable construction: Maintains spring tension to keep the timing pin locked in the housing.
- Aftermarket value: Interstate-McBee quality at a fraction of OEM boxed pricing.
- Quick refresh item: Ideal to replace any time the timing pin or housing is serviced.
Specifications
| Interstate-McBee P/N | M-3904849 |
|---|---|
| OEM Cross-Reference | Cummins 3904849 |
| Function | Retains/locks the engine timing pin in the gearcase housing |
| Engine Family | Cummins B-Series 5.9L 12V (P7100) |
| Position | Front gearcase / timing cover – timing pin housing |
Vehicle Fitment
Always verify by engine serial number (ESN) when possible.
- Dodge Ram 2500/3500, 5.9L Cummins 12-Valve (P7100)
- Model Years: 1994, 1995, 1996, 1997, 1998
- Additional Notes: This retainer is commonly used across B-Series gearcases. Some earlier 1989–1993 12V applications also use 3904849; verify by ESN/build.
Related Service Parts
- Timing Pin – Interstate-McBee M-3903924
- Timing Pin O-Ring – Interstate-McBee M-3913994
- P7100 Timing Case O-Ring – Interstate-McBee M-3969698
Install Tips
- Inspect timing pin and housing for wear; replace O-ring(s) as needed.
- Confirm pin moves freely and snaps positively after retainer installation.
- Follow Cummins service procedures; do not over-deform the retainer during install.
Warranty
New Interstate-McBee engine parts are covered by manufacturer warranty; typical coverage is up to 24 months for new engine parts under normal use. Check the current Interstate-McBee policy for details.
FAQ
Is this the same as the timing pin?No—this is the retainer (star ring) that holds the timing pin in the housing. The pin itself is sold separately.
Will it fit all P7100 12-valve trucks?
Yes—listed for 1994–1998 5.9L Cummins 12V (P-pump). Some 1989–1993 12V setups also use 3904849; verify by ESN.
Do I need to replace the O-ring?
Recommended whenever the timing pin assembly is serviced. The common O-ring is M-3913994.
Any special tools required?
Usually none. Use small picks/pliers with care to avoid overstretching or deforming the retainer.
Product Videos
Custom Field
YEAR 1994-1998
MAKE DODGE
ENGINE 5.9L
