B&M 12310 Nodular Iron Front Differential Cover for Dana 30

1987-2018 Jeep Wrangler YJ, TJ, JK, and Cherokee with Dana 30 10-bolt differential.

PART# 12310

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B&M's popular Hi-Tek line of racing products has this heavy-duty Nodular Iron differential cover specifically designed for serious off-road enthusiasts. This super tough differential cover is perfect for Jeep Wranglers, Cherokees and all applications with Dana 30 differentials. Features include a super durable black powder coated clear gloss finish with machined B&M logo, reinforcing ribs to help strengthen the cover and give it rugged good looks. Other features include a magnetic drain plug, a fill port with an o-ringed magnetic dipstick with easy-grip checkering for a sure grip when checking fluid levels whether on the trail, in the shop or at home. All hardware and installation instructions are included and covered by our Lifetime Limited Warranty. Note: Gasket not included


  • Finned for Strength and Improved Heat Transfer
  • Includes Magnetic Dipstick to Check Fluid Level
  • Includes Stainless Steel Mounting Hardware
  • Low Profile Design for Tight Fit Applications
  • Super Tough Nodular Iron Construction
  • Over 65 Years of B&M Quality
  • Lifetime Limited Warranty
  • Easy Installation

Product Attributes

Emission Code5
Product TypeDifferential Covers
California Proposition 65 Chemical NameChromium (hexavalent compounds)
California Proposition 65 RequiredYes
Part Number12310



This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

Tech Resources

Designed to fit most Jeep Wranglers and other vehicles with a Dana 30 differential, however vehicles may have other interfering components that may require modifications or moving of existing brackets, require longer cover bolts or different cover bolts, clearance of sway bars etc. - Checking for adequate clearance and fitment for your application should be verified prior to purchase & installation. Refer to ID guide and measurement drawings for specifications.


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    *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages.

    Some parts are not legal for use in California or other states with similar regulations.