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L5P Duramax Transmissions

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    BD Diesel FleX-Plate - Chevy 2001-2011 Duramax 6.6L w/Allison Trans

    BD Diesel
    $622.00 - $622.00
    $622.00
    $674.00
    $674.00 - $674.00
    $674.00

    BDs FleX-Plate is designed specifically for modified applications, and can reliably handle up to 1,500 lb.-ft. of torque. Twice as thick as the sto...

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    $622.00 - $622.00
    $622.00
    $674.00
    $674.00 - $674.00
    $674.00
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    Mishimoto 01-19 Duramax Allison A1000 Transmission Pan Cast GR

    Mishimoto
    $663.00
    $663.00 - $663.00
    $663.00
    $603.00
    $603.00 - $603.00
    $603.00

    This Mishimoto Aluminum Transmission Pan is a direct-fit, high-performance upgrade for your 2001-2019 Chevy/GMC 6.6L Duramax. Cast from high-qualit...

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    $663.00
    $663.00 - $663.00
    $663.00
    $603.00
    $603.00 - $603.00
    $603.00
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  • 2020-2025 Sierra/Silverado 2500HD/3500HD 10L1000 Allison Firepunk F1 Transmission | 500HP Rated. 2020-2025 Sierra/Silverado 2500HD/3500HD 10L1000 Allison Firepunk F1 Transmission | 500HP Rated.

    2020-2025 Sierra/Silverado 2500HD/3500HD 10L1000 Allison Firepunk F1 Transmission | 500HP Rated

    Firepunk
    $11,716.00 - $14,646.00
    $11,716.00
    $11,716.00 - $14,646.00
    $11,716.00

    2020-2025 Sierra/Silverado 2500HD/3500HD 10L1000 Allison Firepunk F1 Transmission | 500HP Rated These transmissions feature: -DPC Billet Triple Dis...

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    $11,716.00 - $14,646.00
    $11,716.00
    $11,716.00 - $14,646.00
    $11,716.00
  • 2017-2019 Sierra/Silverado 2500HD/3500HD Allison Firepunk F3 Transmission | 1000HP Rated. 2017-2019 Sierra/Silverado 2500HD/3500HD Allison Firepunk F3 Transmission | 1000HP Rated.

    2017-2019 Sierra/Silverado 2500HD/3500HD Allison Firepunk F3 Transmission | 1000HP Rated

    Firepunk
    $14,646.00 - $16,075.00
    $14,646.00
    $14,646.00 - $16,075.00
    $14,646.00

    2017-2019 Sierra/Silverado 2500HD/3500HD Allison Firepunk F3 Transmission Package Features: Great For Highly Modified Trucks Up To 1000HP 2-Year U...

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    $14,646.00 - $16,075.00
    $14,646.00
    $14,646.00 - $16,075.00
    $14,646.00
    Select Options
  • 2017-2019 Sierra/Silverado 2500HD/3500HD Allison Firepunk F1 Transmission | 750HP Rated. 2017-2019 Sierra/Silverado 2500HD/3500HD Allison Firepunk F1 Transmission | 750HP Rated.

    2017-2019 Sierra/Silverado 2500HD/3500HD Allison Firepunk F1 Transmission | 750HP Rated

    Firepunk
    $10,250.00 - $10,250.00
    $10,250.00
    $10,250.00 - $10,250.00
    $10,250.00

    2017-2019 Sierra/Silverado 2500HD/3500HD Allison Firepunk F1 Transmission Package Features: Great For Mildly Modified Trucks Up To 750HP 2-Year Un...

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    $10,250.00 - $10,250.00
    $10,250.00
    $10,250.00 - $10,250.00
    $10,250.00
    Select Options
  • 2017-2019 Sierra/Silverado 2500HD/3500HD Allison Firepunk F2 Transmission | 900HP Rated. 2017-2019 Sierra/Silverado 2500HD/3500HD Allison Firepunk F2 Transmission | 900HP Rated.

    2017-2019 Sierra/Silverado 2500HD/3500HD Allison Firepunk F2 Transmission | 900HP Rated

    Firepunk
    $12,448.00 - $12,448.00
    $12,448.00
    $12,448.00 - $12,448.00
    $12,448.00

    2017-2019 Sierra/Silverado 2500HD/3500HD Allison Firepunk F2 Transmission Package Features: Great For Mildly Modified Trucks Up To 900HP 2-Year Un...

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    $12,448.00 - $12,448.00
    $12,448.00
    $12,448.00 - $12,448.00
    $12,448.00
    Select Options
  • Firepunk 10L1000 Hard Anodized F-Clutch Drum. Firepunk 10L1000 Hard Anodized F-Clutch Drum.

    Firepunk 10L1000 Hard Anodized F-Clutch Drum

    Firepunk
    $2,197.00 - $2,197.00
    $2,197.00
    $2,197.00 - $2,197.00
    $2,197.00

    Firepunk 10L1000 Hard Anodized F-Clutch Drum – Extended Service Life Upgrade If you’ve serviced the 10L1000 transmission, you may have already enco...

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    $2,197.00 - $2,197.00
    $2,197.00
    $2,197.00 - $2,197.00
    $2,197.00
  • Firepunk 2011-2019 Allison 6 Speed Master Rebuild Kit. Firepunk 2011-2019 Allison 6 Speed Master Rebuild Kit.

    Firepunk 2011-2019 Allison 6 Speed Master Rebuild Kit

    Firepunk
    $2,931.00 - $2,931.00
    $2,931.00
    $2,931.00 - $2,931.00
    $2,931.00

    Our 11-19 Allison master rebuild kit includes all the parts you need to rebuild your owntransmission. These are the main components we use in all o...

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    $2,931.00 - $2,931.00
    $2,931.00
    $2,931.00 - $2,931.00
    $2,931.00
  • User 1 Photo - Primary Save 9% Save %

    Mishimoto 2020+ Chevrolet / GMC Duramax L5P 6.6L Transmission Cooler

    Mishimoto
    $566.00
    $566.00 - $566.00
    $566.00
    $515.00
    $515.00 - $515.00
    $515.00

    Mishimoto Part # - MMTC-DMAX-20The factory transmission cooling on the 2020+ Chevrolet and GMC Duramax L5P 6.6L is sized for stock duty, and fluid ...

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    $566.00
    $566.00 - $566.00
    $566.00
    $515.00
    $515.00 - $515.00
    $515.00
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  • Photo - Primary Photo - Primary

    ATS Diesel 17-19 L5P Duramax 6.6L Billet Flexplate

    ATS Diesel
    $1,180.00 - $1,180.00
    $1,180.00
    $1,180.00 - $1,180.00
    $1,180.00

    ATS Diesel Model 305-900-4440ATS Diesel 17-19 L5P Duramax 6.6L Billet Flexplate

    $1,180.00 - $1,180.00
    $1,180.00
    $1,180.00 - $1,180.00
    $1,180.00
  • Photo - Unmounted Photo - Primary

    aFe 17-19 GM Sierra 3500 HD Power ProGuard OE Replacement Air Filter

    aFe
    $56.00 - $56.00
    $56.00
    $56.00 - $56.00
    $56.00

    aFe Model 35-11006The deeply pleated, high-quality filter media offers exceptional filtration capacity, preventing harmful particles from reaching ...

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    $56.00 - $56.00
    $56.00
    $56.00 - $56.00
    $56.00
  • Photo - Close Up Photo - Primary

    aFe 20-25 GM Sierra 3500 HD Power ProGuard OE Replacement Air Filter

    aFe
    $56.00 - $56.00
    $56.00
    $56.00 - $56.00
    $56.00

    aFe Model 35-11005The deeply pleated, high-quality filter media offers exceptional filtration capacity, preventing harmful particles from reaching ...

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    $56.00 - $56.00
    $56.00
    $56.00 - $56.00
    $56.00
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    XDP EPC Solenoid Fooler Plug XD345

    XDP
    $87.00 - $87.00
    $87.00
    $87.00 - $87.00
    $87.00

    XDP Model XD345Increase the durability, line pressure, and performance of the Allison transmission in your 2011-2019 GM 6.6L Duramax LML and L5P wi...

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    $87.00 - $87.00
    $87.00
    $87.00 - $87.00
    $87.00
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    Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve Kit

    Mishimoto
    $162.00
    $162.00 - $162.00
    $162.00
    $147.00
    $147.00 - $147.00
    $147.00

    The Allison transmission is the backbone of your L5P Duramax. It's responsible for transmitting large quantities of torque from your V8 diesel powe...

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    $162.00
    $162.00 - $162.00
    $162.00
    $147.00
    $147.00 - $147.00
    $147.00
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    Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve Kit

    Mishimoto
    $239.00
    $239.00 - $239.00
    $239.00
    $217.00
    $217.00 - $217.00
    $217.00

    The Allison transmission is the backbone of your L5P Duramax. It's responsible for transmitting large quantities of torque from your V8 diesel powe...

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    $239.00
    $239.00 - $239.00
    $239.00
    $217.00
    $217.00 - $217.00
    $217.00
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    BD Diesel Deep Sump Trans Pan - 2001-2010 Chev Allison 1000

    BD Diesel
    $600.00 - $600.00
    $600.00
    $645.00
    $645.00 - $645.00
    $645.00

    High volumes of cool transmission fluid equate to long transmission life. BDs deep aluminum pans increases the oil capacity by 1qt on the 1989-2007...

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    $600.00 - $600.00
    $600.00
    $645.00
    $645.00 - $645.00
    $645.00
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    Mishimoto 17-19 GM 6.6L Duramax (L5P) Transmission Cooler - Silver

    Mishimoto
    $806.00
    $806.00 - $806.00
    $806.00
    $733.00
    $733.00 - $733.00
    $733.00

    There’s no greater enemy for a transmission than heat. Whether your 2017-2019 Chevy/GMC 6.6L L5P Duramax is a dedicated tow vehicle, hardworking ...

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    $806.00
    $806.00 - $806.00
    $806.00
    $733.00
    $733.00 - $733.00
    $733.00
    Save 9% Save %

L5P Duramax transmissions for 2017 and newer Chevy Silverado HD and GMC Sierra HD trucks.

2017 to 2019 L5P trucks use the Allison 1000 6 speed. 2020 and newer trucks use the Allison 10 speed. Confirm your transmission before ordering.

Related: L5P tuning, L5P fluids, L5P suspension and driveline. Browse all L5P Duramax parts.

Not sure what fits? Send us your VIN and we will match the right part.

Powerhouse Diesel