5.9L / 6.7L Diesel Transmission Upgrades
Yukon Gear & Axle Yoke 9.25in AAM Front: Dodge Ram 2003-2016 5.7L/6.7L/6.4L
Yukon Gear & Axle
$184.89
- Unit price
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Tuff Country Rear Axle U-Bolts 4in Axle Tube Lifted 4in Blocks (REAR): Fits Dodge Ram 2500/3500 2003-2013 5.7L/6.7L Diesel/Hemi
Tuff Country
$59.57
- Unit price
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Yukon Gear & Axle Front Axle 9.25in Chrysler 1555 U-Joint (FRONT): Fits Ram 1500/2500/3500 2003-2025 3.6L/3.7L/5.7L/6.4L 392/6.7L
Yukon Gear & Axle
$130.89
- Unit price
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Yukon Gear & Axle 9.25in Front Axle 1485 U-Joint (FRONT): Fits Dodge Ram 2003-2016 3.6L-8.3L
Yukon Gear & Axle
$192.89
- Unit price
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BD Diesel Front Diff Cover AA 14-9.25 Cast Aluminum (FRONT): Dodge Ram 2500/3500 2003-2013 5.7L/5.9L/6.7L Diesel
BD Diesel
$353.95
- Unit price
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Yukon Gear & Axle Finned Aluminum Diff Cover: Fits Dodge Ram 2003-2016 5.7L/6.4L/6.7L Diesel
Yukon Gear & Axle
$403.89
- Unit price
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BD Diesel Differential Cover: Fits Dodge Ram / Chevy Duramax 2003-2018
BD Diesel
$347.95
- Unit price
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Yukon Gear & Axle Master Overhaul Kit 11.5in Diff: Ram 2500 6.7L / 3500 6.7L 2011-2016
Yukon Gear & Axle
$882.89
- Unit price
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BD Diesel AISIN AS69RC Deep Sump Trans Pan: Ram 3500 2013-2024 6.7L Diesel
BD Diesel
$475.95
- Unit price
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Yukon Gear & Axle Master Overhaul Kit 9.25in: Ram 2500 6.7L Diesel / 3500 6.7L Diesel / 2500 6.4L 392 2019-2023
Yukon Gear & Axle
$434.89
- Unit price
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Yukon Gear & Axle Master Overhaul Kit 9.25in Front Diff (FRONT): Fits Dodge Ram 2003-2018 3.6L-8.3L
Yukon Gear & Axle
$540.89
- Unit price
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Yukon Gear Master Overhaul Kit Rear: Ram 2500 / 3500 2019-2026 6.7L Diesel / 6.4L 392
Yukon Gear & Axle
$614.89
- Unit price
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Yukon Gear & Axle Master Overhaul Kit: Ram 2500 2014-2018 6.7L/6.4L
Yukon Gear & Axle
$867.89
- Unit price
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BD Diesel Deep Sump Trans Pan: Fits Dodge/Ram 2002-2024 5.7L/6.4L/6.7L Diesel/Hemi
BD Diesel
$363.95
- Unit price
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BD Diesel Transmission Pressure Enhancer 68RFE: Fits Dodge/Ram 2007-2019 Diesel/Hemi
BD Diesel
$235.95
- Unit price
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BD Diesel 68RFE One Way Clutch: Dodge Ram 2500 / 3500 2007-2018 5.9L / 6.7L Diesel
BD Diesel
$368.95
- Unit price
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Yukon Gear & Axle Reverse Ring & Pinion 4:88 Gear Ratio: Ram 2500 6.7L / 3500 6.7L 2011-2023 w/ Solid Front
Yukon Gear & Axle
$583.89
- Unit price
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Yukon Gear & Axle Reverse Ring & Pinion 4:30 Gear Ratio: Fits Ram 2014-2023 6.7L Diesel/6.4L 392
Yukon Gear & Axle
$583.89
- Unit price
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Moog Front Hub Assembly (FRONT): Ram 2500 / 3500 2013-2018 6.7L Diesel / 6.4L 392 / 5.7L Hemi
Moog
$606.37
- Unit price
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Tuff Country Rear Axle U-Bolts 4in Axle Tube Lifted 2in Blocks (REAR): Fits Dodge Ram 2500/3500 2003-2013 5.7L/6.7L Diesel/Hemi
Tuff Country
$87.23
- Unit price
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Tuff Country Rear Axle U-Bolts 3.5in Axle Tube Lifted 2in Blocks (REAR): Fits Dodge Ram 2500/3500 2003-2013 5.7L/6.7L Diesel/Hemi
Tuff Country
$57.86
- Unit price
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Yukon Gear & Axle Hi-Perf Ring & Pinion Gear Set 4.88 Ratio: Ram 2500 2014-2019 6.7L/6.4L
Yukon Gear & Axle
$656.89
- Unit price
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Yukon Gear & Axle Hi-Perf Ring & Pinion Gear Set 4.30 Ratio: Ram 2500 2014-2019 6.7L/6.4L
Yukon Gear & Axle
$656.89
- Unit price
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Yukon Gear & Axle Hi-Perf Ring & Pinion Gear Set 3.73 Ratio: Ram 2500 2014-2019 6.7L/6.4L
Yukon Gear & Axle
$656.89
- Unit price
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Yukon Gear & Axle Hi-Perf Gear Set 10.5in 4.11 Ratio: Fits Dodge Ram 2003-2013 3.6L-8.3L
Yukon Gear & Axle
$733.89
- Unit price
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Eaton Detroit Truetrac LSD Diff 9.25in 31T: Ram 1500/2500/3500 2011-2018 3.6L-6.7L
Eaton
Regular price
$793.46
$729.99
Sale
- Unit price
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Yukon Gear LSD 12.0in Rear Differential: Ram 3500 2019-2024 6.7L Diesel / 6.4L 392
Yukon Gear & Axle
$1,044.89
- Unit price
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Yukon Gear & Axle Spin Free Locking Hub Conversion Kit: Dodge Ram 2500 / 3500 DRW 2010-2011 5.7L / 6.7L Diesel
Yukon Gear & Axle
$3,389.89
- Unit price
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Yukon Gear & Axle 4340 Chromoly Axle 38.1in Long (FRONT): Dodge Ram 2500 / 3500 2010-2013 5.7L / 6.7L Diesel
Yukon Gear & Axle
$326.89
- Unit price
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Yukon Gear & Axle 4340 Chromoly Outer Stub Axle Spin Free Kit: Dodge Ram 2500 / 3500 2010-2015 5.7L / 6.7L Diesel / 6.4L 392
Yukon Gear & Axle
$289.89
- Unit price
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Skyjacker Transfer Case Indexing Ring: Fits Dodge Ram 1500/2500/3500 2002-2012 3.7L/3.9L/5.7L Hemi/Diesel
Skyjacker
$405.60
- Unit price
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Yukon Gear & Axle Right Hand Axle Assembly (FRONT): Dodge Ram 2500 / 3500 2010-2013 5.7L / 6.7L Diesel
Yukon Gear & Axle
$620.89
- Unit price
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Banks Power Black Diff Cover Kit 11.5/11.8-14 Bolt: Fits RAM 1500/2500/3500 3.6L-8.3L 2001-2024
Banks Power
Regular price
$438.89
$395.00
Sale
- Unit price
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Yukon Gear & Axle Rear Axle 11.5in (REAR): Fits Ram 3500 2003-2016 5.7L/6.7L/6.4L 392
Yukon Gear & Axle
$253.89
- Unit price
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Yukon Gear & Axle Rear Axle 11.5in (REAR): Fits Dodge Ram 2003-2018 5.7L/6.4L/6.7L Diesel
Yukon Gear & Axle
$253.89
- Unit price
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Yukon Gear & Axle Pinion Install Kit 9.25in Front Diff (FRONT): Fits Dodge Ram 2003-2018 3.6L-8.3L
Yukon Gear & Axle
$293.89
- Unit price
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BD Diesel Billet Input Shaft: Fits Dodge Ram 2007-2018 5.7L/6.7L Diesel
BD Diesel
$1,325.95
- Unit price
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BD Diesel Roadmaster Transmission & Converter Package: Ram 3500 2013-2018 6.7L Diesel
BD Diesel
$6,767.95
- Unit price
- /per
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Durable Transmission Upgrades for 5.9L Magnum and 6.7L Cummins Diesel Engines
The 5.9L Magnum and 6.7L Cummins diesel engines are built to deliver exceptional torque and towing strength in Ram trucks. These transmissions face intense stress from heavy loads and high torque output, making specialized upgrades essential for maintaining smooth shifting and long-term drivetrain reliability.
How transmission upgrades enhance torque handling on 5.9L and 6.7L diesels
Both the 5.9L Magnum and 6.7L Cummins engines generate substantial torque that can overwhelm stock transmission components over time. Upgrading with heavy-duty clutches, reinforced gears, and improved valve bodies helps these transmissions withstand increased torque loads while reducing wear and heat buildup.
- Strengthened internal components resist clutch slippage and gear failure
- Improved hydraulic circuits enhance shift firmness and response
- Upgraded cooling solutions prevent overheating under heavy towing
- Compatibility tailored to 5.9L Magnum and 6.7L Cummins transmissions
Key considerations when selecting transmission upgrades for diesel trucks
Choosing the right transmission upgrade depends on your truck’s usage, whether heavy towing, off-road hauling, or performance driving. It’s important to match upgrades to your engine’s torque curve and intended load to ensure reliable operation without sacrificing drivability or shift quality.
Shop 5.9L and 6.7L diesel transmission upgrades at FastHemis
FastHemis offers a range of transmission upgrade components designed specifically for the 5.9L Magnum and 6.7L Cummins diesel platforms. Enhance your Ram truck’s towing capability and drivetrain durability with parts engineered for these torque-heavy engines. Browse our collection to find the right transmission solutions for your diesel build.