Banks Power 35148-B Ram-Air Transmission Pan

Vehicle Fitment: 2020-2026 GM 2500HD/3500HD 6.6L Duramax L5P 10L1000

The Banks Power 35148-B Ram-Air Transmission Pan increases fluid capacity over the stock 10L1000 transmission pan on 2020–2026 GM 2500HD/3500HD 6.6L Duramax L5P trucks. Using Banks Ram-Air technology and FlowThru fin design, it helps dissipate heat more efficiently for longer transmission fluid life and reduced stress on the transmission cooling and lubrication systems.

Engineered To Run Cool

The forward-facing Ram-Air scoop draws fast-moving cool air under the truck and funnels it through deep external heat-dissipating fins. Even with the Allison 10-speed tucked between the frame rails, the pan is designed so the lowest point is the sacrificial scoop while still adding 3 quarts of capacity.

Breakaway Scoop: The plastic scoop is designed to break away without damaging the pan. If it breaks, Banks will send a replacement scoop.

Banks vs The Competition

Banks aligns internal absorption and external radiator elements with proprietary FlowThru fins to maximize thermal energy transfer—drawing heat from the fluid and rejecting it to airflow under the truck.

Die-Cast vs Sand-Cast

Banks cooling products are die-cast (not sand-cast) for a denser, smoother, less porous interior surface and precision-machined sealing surfaces. Die-casting also enables long, thin cooling fins for improved heat rejection.

Features

• Integrated Weep Plug
• Adds 3 Additional Quarts Of Fluid Capacity
• 134% More Cooling Surface Area Than Stock
• Internal Geometry Allows Full Fluid Drainage
• 123% More Heat Absorption Surface Area Than Stock
• Breakaway Ram-Air Scoop Design Prevents Pan Damage
• Internal Fins Transfer Heat Through The Cover Into The External Fins
• Engineered For High Heat Rejection, Improved Oil Flow & Full Oil Drainage
• 1/8" NPT Port For Adding A Supplemental Temperature Sensor
• 20 Internal Fins Absorb More Heat Than Standard/Many Aftermarket Pans
• Die-Cast Interior Surface For Improved Fluid Flow
• Integrated Support Structure Acts As Anti-Slosh Baffles
• OE-Style Fluid Level Check Plug For Service/Topping Off
• 22 Deep-Cut External Radiator Fins For Added Cooling
• Angled Fill Port To Limit Spillage + Stainless Banks Plug

Technical Specifications

• Aux Temp Sensor Port: 1/8 NPT
• External Heat Radiation Fin Count: 22
• Internal Heat Absorption Fin Count: 20
• External Heat Radiation Surface Area: 1005 in²
• Internal Heat Absorption Surface Area: 835 in²
• Fasteners: 16 x Stainless Steel M6 Flange Hex Bolts
• Material: A380 Aluminum Diecast w/ CNC Machined Surfaces

Oil Service

• Fully Drains Pickup Tube For Quicker Oil Changes
• High-Temperature Resistant Ferrite Magnetic Drain Plug
• Adds 3.0 Quarts Additional Capacity (verify per OEM manual)

Full Application List

• 2020 Chevrolet Silverado 2500 HD 6.6L L5P V8 DIESEL
• 2021 Chevrolet Silverado 2500 HD 6.6L L5P V8 DIESEL
• 2022 Chevrolet Silverado 2500 HD 6.6L L5P V8 DIESEL
• 2023 Chevrolet Silverado 2500 HD 6.6L L5P V8 DIESEL
• 2024 Chevrolet Silverado 2500 HD 6.6L L5P V8 DIESEL
• 2025 Chevrolet Silverado 2500 HD 6.6L L5P V8 DIESEL
• 2026 Chevrolet Silverado 2500 HD 6.6L L5P V8 DIESEL
• 2020 GMC Sierra 2500 HD 6.6L L5P V8 DIESEL
• 2021 GMC Sierra 2500 HD 6.6L L5P V8 DIESEL
• 2022 GMC Sierra 2500 HD 6.6L L5P V8 DIESEL
• 2023 GMC Sierra 2500 HD 6.6L L5P V8 DIESEL
• 2024 GMC Sierra 2500 HD 6.6L L5P V8 DIESEL
• 2025 GMC Sierra 2500 HD 6.6L L5P V8 DIESEL
• 2026 GMC Sierra 2500 HD 6.6L L5P V8 DIESEL

Installation Instructions: Download Installation Instructions