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

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

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