2001-2004 GM 2500HD/3500HD 6.6L LB Duramax Transmission Upgrades

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Randy's Transmission 311241033 Stage 3 Allison 1000 Transmission 900HP Max | 2001-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Randy's Transmission 311241033 Stage 3 Allison 1000 Transmission 900HP Max | 2001-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Randy's Transmissions

Randy's Transmission 311241033 Stage 3 Allison 1000 Transmission 900HP Max | 2001-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: RTS311241033
Price
$7,995
PPE 128020200 Billet C-2 Clutch Hub | 2001-2020 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 128020200 Billet C-2 Clutch Hub | 2001-2020 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 128020200 Billet C-2 Clutch Hub | 2001-2020 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE128020200
Price
$719.99
PPE 128020500 Billet Intermediate Shaft | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 128020500 Billet Intermediate Shaft | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 128020500 Billet Intermediate Shaft | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE128020500
Price
$692.99
BD Diesel 1064702SS TowMaster Allison 1000 Transmission & Converter Package | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7 2WD
BD Diesel 1064702SS TowMaster Allison 1000 Transmission & Converter Package | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7 2WD

BD Diesel

BD Diesel 1064702SS TowMaster Allison 1000 Transmission & Converter Package | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7 2WD

SKU: BDD1064702SS
Price
$5,625
BD Diesel 1031361 Allison Tap Shifter Kit | 2003-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
BD Diesel 1031361 Allison Tap Shifter Kit | 2003-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

BD Diesel

BD Diesel 1031361 Allison Tap Shifter Kit | 2003-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: BDD1031361
Price
$482.95
BD Diesel 1030606-5/8 Xtrude Auxiliary Transmission Oil Cooler with Fan Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
BD Diesel 1030606-5/8 Xtrude Auxiliary Transmission Oil Cooler with Fan Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

BD Diesel

BD Diesel 1030606-5/8 Xtrude Auxiliary Transmission Oil Cooler with Fan Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: BDD1030606-5/8
Price
$735.95
BD Diesel 1030470Transmission Valve Body | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7
BD Diesel 1030470Transmission Valve Body | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

BD Diesel

BD Diesel 1030470Transmission Valve Body | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

SKU: BDD1030470
Price
$1,204.95
SunCoast ALLISONSK Shift Kit | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7/LLY
SunCoast ALLISONSK Shift Kit | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7/LLY

SunCoast Performance

SunCoast ALLISONSK Shift Kit | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7/LLY

SKU: SUNALLISONSK
Price
$315.25
TransGo A1-LU-BST Boost Valve | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7
TransGo A1-LU-BST Boost Valve | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

TransGo

TransGo A1-LU-BST Boost Valve | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

SKU: RPMA1-LU-BST
Price
$90.25
ATS 601-904-4308 Allison 6-Speed Conversion Co-Pilot Transmission Controller | 2006-2024 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
ATS 601-904-4308 Allison 6-Speed Conversion Co-Pilot Transmission Controller | 2006-2024 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

ATS Diesel Performance

ATS 601-904-4308 Allison 6-Speed Conversion Co-Pilot Transmission Controller | 2006-2024 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: ATS601-904-4308
Price
$1,204.99
ATS 601-904-4248 Allison 5-Speed Conversion Co-Pilot Transmission Controller | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
ATS 601-904-4248 Allison 5-Speed Conversion Co-Pilot Transmission Controller | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

ATS Diesel Performance

ATS 601-904-4248 Allison 5-Speed Conversion Co-Pilot Transmission Controller | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: ATS601-904-4248
Price
$1,204.99
PPE 128020210 P1 Sun Gear Cut for Billet C2 Hub | 2001-2020 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 128020210 P1 Sun Gear Cut for Billet C2 Hub | 2001-2020 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 128020210 P1 Sun Gear Cut for Billet C2 Hub | 2001-2020 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE128020210
Price
$359.99
ATS 301-900-4248 Allison Deep Transmission Pan | 2001-2018 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
ATS 301-900-4248 Allison Deep Transmission Pan | 2001-2018 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

ATS Diesel Performance

ATS 301-900-4248 Allison Deep Transmission Pan | 2001-2018 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: ATS301-900-4248
Price
$384.99
SunCoast A1-P1B-6 Modified P1 Sun Gear | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
SunCoast A1-P1B-6 Modified P1 Sun Gear | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SunCoast Performance

SunCoast A1-P1B-6 Modified P1 Sun Gear | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: SUNA1-P1B-6
Sale price
$247.35
Regular price
$255
BD Diesel 1071240 Allison 1000 Proforce 3D Torque Converter | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
BD Diesel 1071240 Allison 1000 Proforce 3D Torque Converter | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

BD Diesel

BD Diesel 1071240 Allison 1000 Proforce 3D Torque Converter | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: BDD1071240
Price
$1,681.95
BD Diesel 1030230 Performance Torque Converter | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
BD Diesel 1030230 Performance Torque Converter | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

BD Diesel

BD Diesel 1030230 Performance Torque Converter | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: BDD1030230
Price
$1,294.95

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DIESEL TRUCK EXPERTS STANDING BY

If you've thrown on some high-performance mods on your 2001-2004 GM 6.6L Duramax, your transmission and Transfer case will feel the strain of increased horsepower and torque to your truck's entire drivetrain. Our premium transmission upgrades for your GM 2500HD/3500HD truck ensures your transmission stays in one place when you add on a ton power for improved drivability and towing capability. Here at Alligator Performance, we offer transmission upgrades such as transmission pans, torque converters, flex plates, modules, and even complete transmissions to give your 6.6L Duramax consistent performance you can count on! Our excellent transfer case help keep the heart of your 4x4 system reliable and high performing to tackle any terrain in your path! Pair your transmission and transfer case upgrades with our full array of Engine Upgrades and Fuel System Upgrades! GM Duramax Fitments: 2001, 2002, 2003, 2004 GM 6.6L Duramax. Submodel Fitments: WT, Custom, LT, LTZ, High Country, 1LT, 2LT, Pro, SLE, SLT, AT4, Denali. Some exceptions apply, please see individual product pages for specific fitments.

GM Duramax>2001-2004 6.6L LB7

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