Product Description
Interstate-McBee M-3910260 Bell Housing Adapter Plug O-Ring – 89–02 5.9L Cummins
OE-style O-ring seal for the bell housing adapter plug on 1989–2002 Dodge Ram 2500/3500 with 5.9L Cummins (12V & 24V). This Interstate-McBee ring restores a positive seal so the plug stays secure and the opening to the torque converter access remains protected from debris.
- Direct replacement: Matches Cummins 3910260 dimensions for a precise fit.
- Application-correct: For the bell housing adapter plug (Cummins ref 3910248).
- Durable elastomer: Resists heat, oil, and compression set for long-term sealing.
- Aftermarket value: Interstate-McBee quality at a lower cost than OEM boxed parts.
Specifications
| Interstate-McBee P/N | M-3910260 |
|---|---|
| OEM Cross-Reference | Cummins 3910260 (O-ring) |
| Related Component | Cummins 3910248 (bell housing adapter plug) |
| Position | Bell housing adapter (passenger side, rear of engine) |
| Material | Oil-resistant elastomer (O-ring) |
Vehicle Fitment
Always verify by engine serial number (ESN) when possible.
- Dodge Ram 2500/3500 5.9L Cummins
- 1989–1993 12-Valve 6BT
- 1994–1998 12-Valve 6BT (P-pump)
- 1998.5–2002 24-Valve ISB
What’s Included
- (1) O-ring, bell housing adapter plug (Interstate-McBee M-3910260)
Install Notes
- Clean the adapter bore and plug; lightly lubricate the O-ring with clean engine oil.
- Seat the plug squarely to avoid pinching; confirm the plug is retained by the O-ring.
- Inspect or replace the plug (Cummins 3910248) if damaged.
Warranty
Interstate-McBee new engine components include manufacturer warranty coverage. Contact us for specific terms on sealing components for your application.
Cross-Reference & Compatibility
Primary: Cummins 3910260. Additional interchange numbers may include: 3046364, 68515, 3000521. Verify fitment before purchase.
Why Buy From CPP Diesel
- Diesel experts with ESN-verified fitment support
- Fast shipping and easy returns
- Great pricing on Interstate-McBee and OEM Cummins components
FAQ
Where is this O-ring used?It seals the bell housing adapter plug on the passenger side at the rear of the engine. That plug provides access to the torque converter bolts and is retained by this O-ring.
Does this fit both 12-valve and 24-valve 5.9L engines?
Yes. It fits 1989–2002 5.9L Cummins applications found in Dodge Ram 2500/3500 trucks (12V and early 24V ISB).
Do I need to replace the plug too?
If the plug (Cummins 3910248) is worn or damaged, replace it. Otherwise, a fresh O-ring typically restores sealing.
Product Videos
Custom Field
YEAR 1989-2002
MAKE DODGE
ENGINE 5.9L
