Product Overview Banks Ram-Air® differential cover extends lubrication life and retains fuel economy. Thanks to its superior fluid and aerodynamics, the Ram-Air® Cover out-performs stock and flat-back high-capacity covers and does so with less lubricant. Increased distance between service intervals and less lubricant means you'll save money while extending gear life.
Fitment Note
Does Not Fit With Rear Sway Bar Does Not Fit F-350 DRW Does Not Fit 2023-24 High-Output
Key Highlights New patented design features Ram-Air scoops for fastest cooling Provides cold high velocity air, overcoming “dead air zone” behind differential Scoops force air up and into massive heat radiation fins Engineered to break-away if snagged on an obstacle Banks cools 5X better than flat-back covers in on-road towing tests over the same road, same weather, operator and vehicle Cools 118% better than flat-backs in 200hp 60mph sustained tests Dry-mount high-pressure silicone O-ring seal. No messy RTV clean! Internal fins transfer heat through the cover into the external fins Clears spare tire heat shield, Panhard bars and other components Does not sacrifice any ground clearance Limited Lifetime Warranty
Fluid Dynamics Axle tube lubricant guides directs lube to bearings w/o overfilling Cover mates flush with differential housing for smooth fluid flow Ring gear raceway controls fluid flow to the pinion and bearings Low fluid aeration means longer fluid life
Technical Specs Weight: 11.7 lbs External heat radiation fin count: 23 Internal heat absorption fin count: 22 Dimensions: 13.3 in X 12.8 in X 3.5 in External heat radiation fin surface area: 694.2 in2 Internal heat absorption fin surface area: 103.1 in2 External heat radiation total surface area: 741.9 in2 Internal heat absorption total surface area: 222.2 in2 Fasteners: 12 x stainless steel 5/16 flange hex bolts Material: A380 aluminum diecast with CNC machined surfaces Internal Volume: About 3.3-3.6 Qts (Check OEM Owners Manual)
Oil service Magnetic drain plug Magnetic fill port plug 20° angled fill port for easy access No need to remove cover to change fluid 1/2 in sight glass with contrast screen (visual aid) and Viton seal Banks recommends Amsoil Severe Gear Synthetic Gear Lube Fill level depends on model year: (About 4.0Qts Fill To OEM Level)
Why It's Better
Introducing the Banks Power Ram-Air® Diff Cover Kit
Patented design cools 5X better than flat-backs
Banks Ram-Air® differential cover extends lubrication life, retains fuel economy, and rejects heat faster than any other cover on the market.
Key Features
Die-Cast Aluminum Construction
A380 aircraft aluminum die-cast for exceptional strength and precise fit.
Magnetic Fill Plug
Magnetic fill plug. 20° angle for easy fill. Simplifies oil changes.
304 Stainless Steel Hardware
Hex flanged mounting bolts.
Sight-Glass with Contrast Screen
Sight-glass with contrast screen and Viton O-ring seal.
Class-Leading Heat Rejection
24 external radiator fins offer 694.2 square inches of surface area to ensure optimal heat rejection.
Magnetic Drain Plug
Recessed magnetic drain plug. Simplifies oil changes.
Patented Ram-Air Scoops
Ram-Air system directs cool high-velocity air through radiator fins, eliminating the dead zone. Designed with breakaway scoops.
NPT Sensor Port
1/8in NPT port for transmission temp monitoring
Key Features
Radiused Ports
Radiused ports for smoother fluid flow.
Directional Fluid Guides
Radiused ports for smoother fluid flow.
O-Ring Seal
Integrated No Mess Viton Seal. Dry-mount silicon high-pressure O-ring seal. No messy RTV required.
Precision Fit Machined Surface
CNC-machined surface ensures precise fit.
Internal Heat Absorption Fins
22 Internal absorber fins offer 103.1 square inches of surface area to transfer heat to external radiator fins without disrupting fluid flow.
Simple Fluid Change
No need to remove cover to change fluid.
Lubricant Raceway
Ring gear raceway provides path for fluid flow to pinion and ring gear-bearing sets.No need to remove cover to change fluid.
Ram-Air System w/Breakaway Scoops
Ram-Air scoop break away point prevents damage if scoop is snagged.
Purpose Built
The Banks Engineering team’s goal was to perfect fluid flow and reject BTUs from the fluid as fast as the ring and pinion puts them in.
If the fluid flow is impeded in any way, it results in resistance and aeration which reduce fuel economy and creates heat, thereby degrading the fluid and decreasing the lifespan of the gearset.
Outperform The Competition, For Less
Thanks to its superior fluid and aerodynamics, the Ram-Air® Cover out-performs stock and flat-back high-capacity covers and does so with less lubricant.
Increased distance between service intervals and less lubricant means you'll save money while extending gear life.
Flat-Back Fail
Extra capacity "Flat-Back" covers have worse fluid dynamics than stock.
Effectively splattering oil at a wall reducing lubrication on key components and increasing wear-tear and heat.
Banks Does It Right
With the proper distance between the ring gear and raceway, oil is lifted up and around the differential.
The internal fluid guides directs the flow exactly to where it's needed.
Flat-Backs Dead Air
The competition has no way of directing airflow, their covers leave a deadzone so temperatures rise faster and fall slower, meaning your oil works harder and components wear faster, costing you fuel economy
Ram-Air Engineering
The Banks differential cover is fundamentally different from its competition because it utilizes Ram-air scoops that direct air through channeled fins, cooling the differential and internal oil temperatures.
Heat Radiation Comparison
The Banks Ram-Air cover features deep external fins with 160% more exterior heat radiation surface area than Mag-Hytec, or over 5x that of the factory cover.
Heat Absorption Comparison
The 22 internal heat absorption fins add an extra 222.2in2to pull heat, or almost 70% more area than stock.
The Superior Choice, Backed by 18 Months of Testing
All other manufacturers simply copied previous designs. They all run on the belief that "more oil means cooler temps."
The Banks Engineering Team uncovered two underlying problems with aftermarket covers; poor air flow and flawed fluid dynamics. The Banks Ram-Air® differential cover solves both issues.
Keeps Your Diff Cool
Tests were performed on a stretch of California’s infamous Grapevine (Interstate 5) on the same truck, with the same driver and the same load, at the same time of day and same temperature
After testing covers with flat-backs and those with larger fluid capacities, it was apparent that these covers do not cool as well as advertised, suffer from poor fluid dynamics, and they all make no use of airflow to cool actively
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