PPE HEAVY DUTY DIFFERENTIAL COVER - RAW 138051000 | 2001-2019 6.6L Duramax LB7/LLY/LBZ/LMM/LML/L5P & 2003-2018 5.9L/6.7L Cummins (AAM 11.5")

Protect your differential and improve thermal performance with the PPE 138051000 Heavy-Duty Differential Cover. Manufactured from premium A356.0-T6 heat-treated cast aluminum, this heavy-duty cover increases fluid capacity while improving heat dissipation to help extend the life of gears, bearings, and limited-slip components in demanding towing, performance, and off-road applications.

Designed for both strength and efficiency, the cover features half-inch external cooling fins and precision-cast internal windage scrapers that work together to reduce fluid aeration, minimize heat buildup, and improve lubricant distribution throughout the differential. Cast-in gussets provide additional housing rigidity, while magnetic stainless steel fill and drain plugs capture harmful metal particles to help protect internal components.

Features:

• Raw cast aluminum finish
• Premium A356.0-T6 heat-treated cast aluminum construction
• Increases differential fluid capacity by approximately 0.63 quart
• Half-inch external cooling fins improve heat dissipation
• Internal windage scrapers reduce fluid churning and aeration
• Helps lower differential operating temperatures
• Cast-in gussets increase housing rigidity and flange support
• Precision-cast using permanent steel molds for excellent dimensional accuracy
• 304 stainless steel fill and drain plugs
• High-temperature neodymium magnetic plugs capture ferrous debris
• Viton O-rings provide reliable sealing

Important Notes:

• Fits only vehicles equipped with the AAM 14-bolt 11.5-inch rear axle.
• Gas-powered trucks must be verified to have the 11.5-inch differential before ordering.
• For Ram applications, fits 2013 and newer diesel trucks equipped with rear leaf spring suspension only.
• Not compatible with rear coil spring suspension models due to clearance limitations.