Banks Ram-Air® Differential Cover Kit - GM Duramax 6.6L (2001-2019) / Dodge RAM Cummins (2003-2018) AAM 11.5"/11.8" 14-Bolt (2001-2024)

The Banks Ram-Air® Differential Cover Kit replaces the stock rear cover on GM Duramax and Dodge/RAM trucks equipped with the AAM 11.5" or 11.8" 14-bolt rear axle. The patented Ram-Air scoops direct high-velocity air through external radiator fins to reject differential heat, while internal absorber fins and added oil capacity help extend fluid life. U.S. Patent 10,443,705 B1.

Key features

• A380 die-cast aluminum construction with CNC-machined sealing surface
• 24 external radiator fins (about 534 in² of surface area) for heat rejection
• 26 internal heat-absorption fins (about 120 in² of surface area)
• Patented breakaway Ram-Air scoops direct cool air through the fins
• Sight-glass with contrast screen and Viton O-ring seal
• 20° angled fill plug and recessed magnetic drain plug for easier service
• Dry-mount silicone high-pressure O-ring seal, no RTV required
• 1/8 in NPT port for differential temp monitoring
• 304 stainless steel hex flanged mounting hardware

Technical specs

• Weight: 11.7 lbs
• External heat radiation fin count: 24
• Internal heat absorption fin count: 26
• Dimensions: 14.2 in x 13.3 in x 3.8 in
• External heat radiation total surface area: 808.81 in²
• Internal heat absorption total surface area: 215.78 in²
• Fasteners: 14 x stainless steel M8-1.25 flange hex bolts
• Material: A380 aluminum die-cast with CNC-machined surfaces
• Internal volume: about 4.0 qts (check OEM owner's manual)
• 1/2 in sight glass with contrast screen and Viton seal
• Banks recommends Amsoil 75W-90 Severe Gear synthetic gear lube
• U.S. Patent 10,443,705 B1

Fitment

Fits the AAM 11.5" or 11.8" 14-bolt rear axle on: 2001-2019 Chevrolet Silverado 2500/3500 and GMC Sierra 2500/3500 (6.6L Duramax diesel and gas models); 2003-2018 Dodge/RAM 2500/3500/4500 (5.9L and 6.7L Cummins); and 2019-2024 RAM 2500 6.4L gas (trucks with straight edges). CARB E.O. not required.

Installation

Installation manual and video from Banks.

Service parts

Available finishes: Black Ops (19269), Satin Black/Machined (19249), Natural Aluminum (19259).

Banks parts 19269, 19249, 19259.