5.9L / 6.7L Diesel Transmission Upgrades
ATS Diesel 2WD G56 Manual Transmission: Dodge Ram 2500 / Ram 3500 2004-2010
ATS Diesel
$6,794.99
- Unit price
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ATS Diesel Manual Transmission: Dodge Ram 2500 / Ram 3500 2004-2010
ATS Diesel
$6,794.99
- Unit price
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ATS Diesel NV4500 Transmission: Dodge Ram 2500 / Ram 3500 (96-99)
ATS Diesel
$3,234.99
- Unit price
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ATS Diesel NV4500 Transmission: Dodge Ram 2500 / Ram 3500 1996-1999
ATS Diesel
$3,234.99
- Unit price
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ATS Diesel NV4500 Transmission: Dodge Ram 2500 / Ram 3500 1994-1998
ATS Diesel
$3,234.99
- Unit price
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ATS Diesel Billet Flexplate: Ram 2500 11-12 6.7L Diesel/5.7L, Ram 3500 11-12 5.7L Hemi
ATS Diesel
$459.99
- Unit price
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ATS Diesel Five Star Torque Converter Mid Stall: Ram 2500 11-12 6.7L Diesel/5.7L, Ram 3500 11-12 5.7L Hemi
ATS Diesel
$1,649.99
- Unit price
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ATS Diesel Racing Edition Valve Body: Dodge Ram 2500 / Ram 3500 1994-1995
ATS Diesel
$699.99
- Unit price
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ATS Diesel Five Star Torque Converter: Dodge Ram 2500 / Ram 3500 2003-2004
ATS Diesel
$1,509.99
- Unit price
- /per
ATS Diesel Five Star Torque Converter: Dodge Ram 2500 / Ram 3500 2003-2004
ATS Diesel
$1,509.99
- Unit price
- /per
ATS Diesel Five Star Torque Converter: Dodge Ram 2500 / Ram 3500 1994-2007
ATS Diesel
$1,509.99
- Unit price
- /per
ATS Diesel TripleLok Torque Converter: Dodge Ram 2500 / Ram 3500 1994-2007
ATS Diesel
$1,299.99
- Unit price
- /per
ATS Diesel Rear Differential Cover: Ram 2500 11-12 6.7L Diesel/5.7L, Ram 3500 11-12 5.7L Hemi
ATS Diesel
$289.99
- Unit price
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Fleece Performance CP3K Fuel Pump: Dodge Ram 2500 / Ram 3500 03-07 5.9L Diesel
Fleece Performance
$1,449.00
- Unit price
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PPE Transmission Pan Gasket Aisin AS69RC: Ram 2500 / 3500 2013-2024 6.7L Diesel
PPE
$32.99
- Unit price
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PPE MicroPure Spin-On Transmission Fluid Filter: Ram 2007-2024 65RFE/66RFE/68RFE
PPE
$19.99
- Unit price
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PPE HD Cast Aluminum Front Diff Cover 9.25"-14-Bolt: Dodge Ram 2003-2013 5.7L/6.7L Diesel
PPE
from $319.99
- Unit price
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PPE HD Cast Aluminum Rear Diff Cover: Ram 2500 / 3500 2019-2024 6.4L 392 / 6.7L Diesel
PPE
from $329.99
- Unit price
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PPE HD Cast Aluminum Rear Diff Cover 11.5"-14-Bolt: Fits GM Dodge Ram 2001-2019
PPE
from $319.99
- Unit price
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PPE HD Cast Aluminum Rear Diff Cover: Fits GM RAM 2001-2019 AAM 11.5"-14-Bolt
PPE
from $319.99
- Unit price
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PPE HD Cast Aluminum Transmission Pan: Ram 2500 / 3500 2013-2024 6.7L Diesel
PPE
from $329.99
- Unit price
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PPE 7Y-Spoke Billet Aluminum Pulley Wheel: Dodge Ram 1994-2009 5.9L/6.7L Diesel
PPE
$199.99
- Unit price
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PPE Bar and Plate Transmission Cooler: Ram 2500 / 3500 2015-2018 6.7L Diesel
PPE
$439.99
- Unit price
- /per
ARB Airlocker Dana 70/80 32 Spline Low Speed S/N: Dodge Ram 2500/Ram 3500 94-02 8.0L/5.9L Diesel/5.7L/5.2L
ARB
$1,499.95
- Unit price
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Eaton Detroit Truetrac Helical LSD 30 Spline (REAR): Dodge Ram 2500/Ram 3500 94-02 8.0L/5.9L Diesel/5.7L/5.2L
Eaton
Regular price
$1,358.69
$1,249.99
8% off
- Unit price
- /per
ARB Airlocker Dana 60 30 Spl 4.56+ Diff (REAR): Dodge Ram 2500/Ram 3500 94-03 8.0L/5.9L Diesel/5.7L/5.2L
ARB
$1,399.95
- Unit price
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ARB Airlocker Dana 70/80 37 Spline High Speed: Dodge Ram 2500/Ram 3500 94-02 8.0L/5.9L Diesel/5.7L/5.2L
ARB
$1,499.95
- Unit price
- /per
Eaton Detroit Locker Diff 31 Spline (REAR): Fits Most Chrysler/Dodge (92-10)
Eaton
Regular price
$1,246.73
$1,146.99
8% off
- Unit price
- /per
Yukon Gear & Axle Semi-Floating Axle Blank w/ C-Clip: Fits Most Dodge 6.7L Diesel/5.9L Diesel/5.7L (09-10)
Yukon Gear & Axle
$319.89
- Unit price
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Yukon Gear & Axle 9.25in Open Loaded Carrier Case: Fits Most Dodge (94-10)
Yukon Gear & Axle
$440.89
- Unit price
- /per
Eaton Rear Master Install Kit (REAR): Fits Most Dodge 8.0L/5.9L Diesel/5.7L/5.2L/3.9L/3.7L (97-04)
Eaton
Regular price
$174.40
$149.99
14% off
- Unit price
- /per
Victor Reinz Axle Housing Cover Gasket: Fits Most Dodge/Jeep (91-06)
Victor Reinz
$16.73
- Unit price
- /per
ARB Airlocker Dana 70/80 37 Spline Low Speed S/N: Dodge Ram 2500/Ram 3500 94-02 8.0L/5.9L Diesel/5.7L/5.2L
ARB
$1,499.95
- Unit price
- /per
Eaton ELocker4 Electronic Diff Dana 60 30 Spline (REAR): Fits Most Dodge 8.0L/5.9L Diesel/5.7L/5.2L/3.9L (92-02)
Eaton
Regular price
$1,776.58
$1,669.99
6% off
- Unit price
- /per
Eaton ELocker4 Dana 60 30 Spline Electronic Locking Diff (REAR): Fits Most Dodge 8.0L/5.9L Diesel/5.7L/5.2L/3.9L (92-02)
Eaton
Regular price
$1,776.58
$1,669.99
6% off
- 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.