Thoroughbred Diesel
Banks Differential Cover - 01-19 GM and 03-18 RAM with AAM 11.5" or 11.8" 14 Bolt Rear Axle - Black Ops
Banks Differential Cover - 01-19 GM and 03-18 RAM with AAM 11.5" or 11.8" 14 Bolt Rear Axle - Black Ops
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Fits
| Year | Make | Model |
| 2001-2019 | GMC | Duramax GMC/Chevrolet W/AAM 11.5 or 11.8" 14 Bolt Rear Axle |
| 2001-2018 | Dodge | Cummins 2500/3500 w/ AAM 11.5" or 11.8" 14 Bolt Rear Axle |
Product Name: Banks Differential Cover - 01-19 GM and 03-18 RAM with AAM 11.5" or 11.8" 14 Bolt Rear Axle - Black Ops
Manufacturer: Banks
Manufacturer Part #: 19269
Fitment Notes: 2001-2019 GM and 2003-2018 RAM
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.
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.
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.
Keeps Your Diff 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.
Ground Clearance
Our patented Ram-Air scoops are designed to increase airflow over the rear differential without sacrificing ground clearance. In fact, our differential cover retains the same low point as factory and competitors.
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 534 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 Port1/8in NPT port for transmission temp monitoring.
Radiused Ports
Radiused ports for smoother 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.
Precision Fit Machined Surface
CNC-machined surface ensures precise fit.
Internal Heat Absorption Fins
26 Internal absorber fins offer 120 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.
Ram-Air System w/Breakaway Scoops
Ram-air scoop break away point prevents damage if scoop is snagged.
Banks Differential Cover Features:
-
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
- 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
- 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 fin surface area: 533.782 in2
- Internal heat absorption fin surface area: 119.882 in2
- 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 diecast with CNC machined surfaces
- Internal Volume: About 4.0 Qts (Check OEM Owners Manual)
- 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 75W-90 Severe Gear Synthetic Gear Lube
- Fill level depends on model year: (About 4.0Qts Fill To OEM Level)
- For more information on Banks call us at 1-859-737-4966.
NPT Sensor Port
1/8in NPT port for transmission temp monitoring.
Radiused Ports
Radiused ports for smoother 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.
Precision Fit Machined Surface
CNC-machined surface ensures precise fit.
Internal Heat Absorption Fins
26 Internal absorber fins offer 120 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.
Ram-Air System w/Breakaway Scoops
Ram-air scoop break away point prevents damage if scoop is snagged.
Banks Differential Cover Features:
-
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: 24
- Internal heat absorption fin count: 26
- Dimensions: 14.2 in X 13.3 in X 3.8 in
- External heat radiation fin surface area: 533.782 in2
- Internal heat absorption fin surface area: 119.882 in2
- 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 diecast with CNC machined surfaces
- Internal Volume: About 4.0 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 75W-90 Severe Gear Synthetic Gear Lube
- Fill level depends on model year: (About 4.0Qts Fill To OEM Level)


Purpose Built
When the team at Banks sat down at the drawing board, the goal was to perfect fluid flow and reject BTU's from the fluid as fast as the ring and pinion put them in. When you slow down the fluid in any way, it results in resistance and aeration which KILL your fuel economy. Not only does it hurt your fuel economy, it begins to build heat, this heat will slowly but consistently degrade the fluid and decrease the lifespan of the gearset.
The Banks Power design is to allow the fluid to flow through your gears with little to no resistance, keeping your oil cool and having consistent coverage on your gears without drowning the bearings.


Currently, most aftermarket covers floating around the market today have fins for cooling. However, those fins really don't do anything, yes, they may dissipate heat to some extent, but there really is no airflow hitting the back of your cover. Also, most of the flat back covers impede the flow, imagine firing a hose at a brick wall, what happens to the fluid?

A380 aircraft aluminum die-cast for exceptional strength and precise fit.
Chrome-Plated Hardware
12-Point Chrome Plated Flanged Mounting Bolts
Class-Leading Heat Rejection
24 external radiator fins offer 534 square inches of surface area to ensure optimal heat rejection.
Patented Ram-Air Scoops
Ram-Air system directs cool high-velocity air through radiator fins, eliminating the dead zone. Designed with breakaway scoops.
Magnetic 3/4" fill plug with 3/8" square drive, no hex wrench required. 20 angle for easy fill. Simplifies oil changes.
Stainless Sight-Glass with Contrast Screen
1/2" stainless steel sight-glass with contrast screen and Viton O-ring seal.
Magnetic Drain Plug
Recessed magnetic 3/8" drain plug with 3/8" square drive, no hex wrench required. Simplifies oil changes.


The Banks Power Ram-Air system increases the amount of airflow that gets pushed passed your differential by scooping air as you move and directing it through the fins on your cover.
Other covers may use fins to cool the differential but they don't have a method of pulling the airflow into those fins on the differential.
Banks Power Part Number: 19249, 19259, 19269
