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Speed School Podcast with Gale Banks

Ram-Air® Differential Cover Kit

Starting at $0.00

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Ram-Air® Differential Cover Kit

Starting at $0.00

Select Options

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.
3 Image composite of the Black-Ops, Machined, and Natrual Aluminum Ram-Air Diff Covers For Dana 80

Key Features

Die-Cast Aluminum Construction

A380 aircraft aluminum die-cast for exceptional strength and precise fit.

Magnetic Fill Plug

Magnetic fill plug with Viton O-ring seal. Simplifies oil changes.

304 Stainless Hardware

Stainless flange hex mounting bolts.

Sight-Glass with Contrast Screen

Sight-glass with contrast screen and Viton O-ring seal.

Class-Leading Heat Rejection

21 external radiator fins 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

Add a temperature sensor.

Key Features

Image showing a smooth radiused internal surface

Radiused Ports

Radiused ports for smoother fluid flow.
Animation depicting fluid flow

Directional Fluid Guides

Axle-tube guides direct fluid to axle bearings without churn.

O-Ring Seal

Integrated No Mess Viton Seal. Dry-mount silicon high-pressure O-ring seal. No messy RTV required.
Graphic highlighting covers machined surface

Precision Fit Machined Surface

CNC-machined surface ensures precise fit.
Animation showing internal fins obsorbing heat

Internal Heat Absorption Fins

16 Internal absorber fins increase surface area and transfer heat to external radiator fins without disrupting fluid flow.
Animation showing oil drain process

Simple Fluid Change

No need to remove cover to change fluid.
Animation highlighting lubricant raceway

Lubricant Raceway

Ring gear raceway provides path for fluid flow to pinion and ring gear-bearing sets.
Graphic showcasing Ram-Air scoops

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.
Transparent animation showing differential internal design

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.
Animation showing Banks Ram-Air Differentials superior fluid dynamics

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.
2D Animation showing Flat-Back covers flawed design

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.
2D Animation showing Banks Ram-Air Differentials superior fluid dynamics

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.
2D Animation showing Flat-Back covers poor cooling ability

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.
2D Animation showing Banks Ram-Air scoops superior cooling ability

The Superior Choice, Backed by 18 Months Of Testing

What began with a simple question, resulted in millions of video views, innovation, and another patented Banks product.

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.
Test chart showing Banks superior cooling vs AFE and Stock. Banks design cools 118% better.

Keeps Your Dif Cool

And your oil even cooler

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.
Test chart showing Banks superior cool down ability vs AFE and Stock. Banks design cools 4X better.

Banks Recommends Amsoil Lubricant

We searched for information on every popular brand of gear oil. The only company with in-depth knowledge and the willingness to share it was AMSOIL.

They are every bit as thorough in their development as we are. The more info we discovered, the more we liked how AMSOIL designs and test their products. If you want to see for yourself, here is a link to their 75w90 test results.
Image of 4 Amsoil lubricant pouches

Coming Soon for Dana 80 Rear Axles:

1994-2002 Ram 5.9L and
1999-2007 Ford F350/F450

Signup below to be notified once available for release.
3D Rendering of the Banks Ram-Air Dana 80 Cover
3 Image composite of the Black-Ops, Machined, and Natrual Aluminum Ram-Air Diff Covers For Dana 80
3 Image composite of the Black-Ops, Machined, and Natrual Aluminum Ram-Air Diff Covers For Dana 80
CAD Render of Dana 80 Ram-Air Differential Cover in Black Ops Finish
CAD Render of the interior of the Dana 80 Ram-Air Differential Cover
CAD Render of Dana 80 Ram-Air Differential Cover in Black Ops Finish
CAD Render of the interior of the Dana 80 Ram-Air Differential Cover
CAD Render of Dana 80 Ram-Air Differential Cover in Machined Finish
CAD Render of the interior of the Dana 80 Ram-Air Differential Cover
CAD Render of Dana 80 Ram-Air Differential Cover in Machined Finish
CAD Render of the interior of the Dana 80 Ram-Air Differential Cover
CAD Render of Dana 80 Ram-Air Differential Cover in Natural Aluminum
CAD Render of the interior of the Dana 80 Ram-Air Differential Cover
CAD Render of Dana 80 Ram-Air Differential Cover in Natural Aluminum
CAD Render of the interior of the Dana 80 Ram-Air Differential Cover

Ram-Air® Differential Cover Kit

Patented design cools 5X better than flat-backs
For 1994-2002 Ram 5.9L and 1999-2007 Ford F350/450, with Dana 80 Rear Axle

Choose Your Ram-Air® Differential Cover Kit

$0.00
Black Ops
$0.00
Satin Black/Machined
$0.00
Natural Aluminum
Free Shipping on orders over $100 (48 Contiguous US)*

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.

US Patent #10,443,705

Check for fitment and clearance before ordering.

Specifications

When it comes to product development, we only make products that increase performance and beat the competition. So when we tested the popular Diff Covers on the market, we were shocked to find out that they actually hurt performance. This lead to the development of something so New and Incredible that our performance design has a United States Patent.

Look, when we set out to build a product for your vehicle, we only engineer the best. What else would you expect from a company with a winning legacy that spans decades! We are here to win, and we just did (AGAIN) in a huge way.

Key Features

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: TBD
  • External heat radiation fin count: TBD
  • Internal heat absorption fin count: TBD
  • Dimensions: TBD
  • Fasteners: 10 x stainless steel flange hex bolts
  • Material: A380 aluminum diecast with CNC machined surfaces
Oil service
  • Magnetic drain plug
  • Magnetic fill port plug
  • 20° 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 75W-90 Severe Gear Synthetic Gear Lube
  • Fill level depends on model year: (Fill To OEM Level)

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