2020-2026 Duramax Ram-Air Transmission Pan (35148-B)

Note: Filter and Gasket NOT included

Banks adds their Ram-Air cooling to the heavy-duty Allison 10L1000 transmission for 2020-2026, using technology from their patented differential covers. The Banks Ram-Air Transmission Pan keeps fluid oil fresh by expelling more heat than stock and other brands. It also provides three extra quarts of space, a break-away  Ram-Air scoop, and Banks FlowThru Fins for maximum cooling. Using cooler fluid will help your transmission last longer.

Part Number: 35148-B

• Engineered for the highest heat rejection, improved oil flow, and full oil drainage
• Adds 3 additional quarts of fluid capacity
• Internal fins transfer heat through the cover into the external fins
• 123% more heat absorption surface area than stock
• 134% more cooling surface area than stock
• Breakaway Ram-Air Scoop Design Prevents Pan Damage
• Internal geometry allows full fluid drainage

• Will NOT work with AEV skid plates
• Transmission Pan Gasket (NOT INCLUDED): 2020-2024 GM Part No. 24297922
  Transmission Fluid Filter (NOT INCLUDED):  2020-2024 GM Part No. TF938 or 24298004

Fluid Dynamics

• Internal cooling fins run inline with the drain port, with streamlined passageways
• Downward-facing port eases the oil change process
• Low fluid aeration means longer fluid life

Technical Specs

• 1/8 NPT port for aux temp sensor
• 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 die-cast with CNC machined surfaces

Oil service

• High temp resistant Ferrite Magnetic Drain Plug
• Fully drains the oil pickup tube for quicker oil changes
• Banks recommends Amsoil ATF
• Adds 3.0 quarts of additional capacity (Check OEM Owners Manual)

Don't see your question? Ask us anything about this product.

• ?

  Does the factory dipstick still measure the level properly with the 3 extra quarts, or do I need to check the level through the fluid level check plug?

  Your factory dipstick will still measure the fluid level perfectly.

• ?

  Will this void my warranty

  Installing the Banks Ram-Air Transmission Pan on your Duramax is unlikely to void your entire vehicle warranty. However, if a warranty claim arises and the dealership determines that the aftermarket pan caused or contributed to the issue, they may deny coverage for that specific repair.