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GM 10L100 Allison 10 Speed Deep
    GM 10L100 Allison 10 Speed Deep
    Purchase GM 10L100 Allison 10 Speed Deep
    • GM 10L100 Allison 10 Speed Deep
      Part Number 11174

    • Prototype parts expected December 2022. Let us know you are interested by signing up for our mailing list (scroll down).

      10 Speed GM 10L100 Allison Transmission Pan, Extra Capacity, for 2020 and newer 2500, 3500, 4500 Duramax trucks.

    Number of Bolts: 16 bolts (18 holes, 16 bolt holes and 2 holes to locate gasket)

    Subscribe to our GM Allison 10 Speed Transmission Pan mailing list

    Please sign up for our email list so we know that you're interested in this pan. You will get updates about this project (like 2 or 3 emails per year).

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    In 2020, heavy duty GMC and Chevy Silverado and Sierra trucks started using the new Allison GM 10L100 10 speed. The Duramax diesels are usually paired with this new transmission on 2500 and 3500 models.

    In 2020, 4500, 5500 and 6500 trucks still use the classic 6 speed Allison transmission.

    Allison 10L100 stock transmission pan  OEM Allison Stock Transmission Pan. Click on image to view larger.

    PML GM 10L100 Allison Pan Development

    We are collecting information on vehicles and fitment and any clearance issues, like exhaust routing, drive shaft and frame cross members.

    Any suggestions or pictures from your vehicle would be welcome! Email us at or call 310-671-4345.

    Benefits of PML Design

    • Extra capacity
    • Finned to increase surface area for heat dissipation
    • Drain and magnetic drain plug
    • Thick walls and gasket flange
    • Heavy duty construction