Transmissions - Automatique

This is the Fram Deep Sump Pan internal transmission filter for your GMC/Chevy LLY/LBZ/LB7/LMM 6.6L truck. No need to spend time locating the correct transmission filter, get it right here.

This is the Baldwin internal in-pan transmission filter for your GMC/Chevy LLY/LBZ/LB7/LMM 6.6L truck. No need to spend time locating the correct transmission filter, get it right here.

This is the Baldwin internal in-pan transmission filter for your GMC/Chevy LLY/LBZ/LB7/LMM 6.6L truck. No need to spend time locating the correct transmission filter, get it right here.

No need to spend time locating the right deep sump filter service kit for your Allison transmission, get it right from the source.

New genuine Allison transmission pan gasket for your 2001-2019 6.6L LB7/LLY/LBZ/LMM/LML/L5P Duramax

2003-2005 GM 6.6L Duramax LB7 LLY - Add fingertip control to your Allison transmission for easier shifting when passing, pulling, hill climbing or wherever you need to switch gears quickly – just like the newer trucks.

Install the Allison 29546972 Pressure Switch Assembly to your 2001-2019 GM 6.6L Duramax and get an OEM replacement component.

2004.5 - 2005 GM 6.6L Duramax LLY ($500.00 Refundable Core Charge Will Apply)

Mishimoto's new transmission cooler for your 2003.5-2005 GMC/Duramax LB7/LLY has 174% greater core volume and 192% greater external fin surface area over the stock OEM cooler. If you tow, then this cooler is a must!

This heavy duty oil pan adds 3.5 quarts to the transmission's oil system, extending the life of your Allison by keeping it running cool under harsh conditions. Fits 2001-2018 GMC/Chevy Duramax 6.6L trucks with LB7, LLY, LBZ, LMM, or LML engines.

2001-2016 GM 6.6L Duramax LB7 LLY LBZ LMM LML w/ 5/8" Cooler Lines - BD's Double stacked cores deliver over 40,000 BTU/HR of cooling and over 350% temperature drop versus the factory system.

The ATS 3059004248 Billet Flex Plate for your 2001-2015 GM 6.6L Duramax an excellent alternative to stock and other manufacturers flexplates, solving the breakage issues so commonly found.

Reliably handle up to 1500 lbs-ft of torque with BD's heavy duty Black Oxide Flexplate for your 2001-2016 GMC/Chevy 6.6L Duramax. Forged from billet steel, this flexplate has twice the material of the stock plate, is precision balanced, and will fit any OEM or aftermarket torque convertor. SFI 29.3 approved!

2001 - 2010 GM 6.6L Duramax LB7/LLY/LBZ/LMM ($400.00 Refundable Core Charge Will Apply)

2001 - 2016 GM 6.6L Duramax LB7/LLY/LBZ/LMM/LML ($400.00 Refundable Core Charge Will Apply)

2004.5 - 2006 GM 6.6L Duramax LLY ($2350.00 Refundable Core Charge Will Apply)

Cognito's Allison Transmission Bracket for your 2005-2019 Chevrolet and GMC 2500HD / 3500HD 4WD trucks (equipped with 6 speed Allison only).

The Merchant Automotive 10193 Performance Transfer Case Oil for your 2001-2016 GM 6.6L Duramax is specially designed for use in GM Transfer Cases.

2004.5-2006 GMC Chevy Duramax LLY 2WD - Increase the durability of your drivetrain with BD's heavy duty Allison A1000 transmission complete with billet input shaft, matched and dyno tested with a triple disc billet Torque Converter, all in one package. A $2750.00 refundable core charge will apply.

2004.5-2006 GMC Chevy Duramax LLY 4WD - Increase the durability of your drivetrain with BD's heavy duty Allison A1000 transmission complete with billet input shaft, matched and dyno tested with a triple disc billet Torque Converter, all in one package. A $2750.00 refundable core charge will apply.

2004.5-2006 GMC Chevy Duramax LLY 2WD - Increase the durability of your drivetrain with BD's heavy duty Allison A1000 transmission, matched and dyno tested with an enhanced stall billet Torque Converter, all in one package. A $2750.00 refundable core charge will apply.

2004.5-2006 GMC Chevy Duramax LLY 4WD - Increase the durability of your drivetrain with BD's heavy duty Allison A1000 transmission, matched and dyno tested with an enhanced stall billet Torque Converter, all in one package. A $2750.00 refundable core charge will apply.

2001 - 2018 GMC/Chevy Duramax 6.6L (LB7 / LLY / LBZ / LMM / LML / L5P)

2001-2016 GM 6.6L Duramax LB7 LLY LBZ LMM LML w/ 5/8” Cooler Lines - BD Coolers provide 22% more cooling over other designs. The 200 Micro Extruded passages provide a large surface area to transfer heat for external air flow cooling while turbulent oil flow design promotes a more complete cooling.

The XDP X-Tra Cool Transmission Oil Cooler is a direct fit upgrade for the factory transmission oil cooler in your 2001-2005 GMC/Chevy 6.6L Duramax truck.