5.9L / 6.7L Diesel Transmission Upgrades
aFe Power Street Series Front Diff Cover Raw Machined Fins: Ram 2013-2018 5.7L/6.4L
aFe
$298.00
- Unit price
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Banks Ram-Air Diff Cover Kit Black Ops: Ram 1500 26 3.6L V6, Ram 2500 / 3500 19-24 6.4L 392
Banks Power
Regular price
$472.22
$425.00
Sale
- Unit price
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Banks Ram-Air Diff Cover Kit Satin Black: Ram 1500 26 3.6L V6, Ram 2500 / 3500 19-24 6.4L 392
Banks Power
Regular price
$472.22
$425.00
Sale
- Unit price
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Banks Power Sway Bar Spacer Kit: Fits Most Ram (11-25)
Banks Power
Regular price
$43.33
$39.00
Sale
- Unit price
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Victor Reinz Axle Housing Cover Gasket: Fits Most Dodge/Jeep (91-06)
Victor Reinz
$16.73
- Unit price
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Revolution Gear & Axle 4.10 Ratio Gear Package: Dodge Ram (94-01)
Revolution Gear & Axle
$865.99
- Unit price
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Revolution Gear & Axle 4.88 Ratio Gear Package: Dodge Ram (94-01)
Revolution Gear & Axle
$849.99
- Unit price
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Revolution Gear & Axle Front Disconnect Ring & Pinion Master Install Kit: Dodge Ram (94-01)
Revolution Gear & Axle
$201.99
- Unit price
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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
Sale
- Unit price
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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
Sale
- Unit price
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Eaton ELocker4 Dana 60 Performance 35 Spline Differential: Dodge Ram 2500/Ram 3500 94-00 8.0L/5.9L Diesel/5.2L
Eaton
Regular price
$1,584.03
$1,488.99
Sale
- Unit price
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Eaton ELocker4 Dana 60 Performance 35 Spline Differential: Dodge Ram 2500/Ram 3500 94-00 8.0L/5.9L Diesel/5.2L
Eaton
Regular price
$1,584.03
$1,488.99
Sale
- Unit price
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Eaton Detroit Locker Diff 31 Spline (REAR): Fits Most Chrysler/Dodge (92-10)
Eaton
Regular price
$1,246.72
$1,146.99
Sale
- Unit price
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Eaton Helical LSD Detroit Truetrac Diff 31 Spline (REAR): Fits Most Chrysler/Dodge (92-10)
Eaton
Regular price
$891.29
$819.99
Sale
- Unit price
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Eaton Helical Gear 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
Sale
- 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
$1,372.28
$1,249.99
Sale
- 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
Yukon Gear & Axle Hi-Perf Ring & Pinion Gear Set 9.25" 4.88 Ratio: Fits Most Dodge 8.0L/5.9L Diesel/5.7L/5.2L/3.9L/3.7L (94-10)
Yukon Gear & Axle
$565.89
- 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
$179.63
$153.99
Sale
- Unit price
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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
- /per
Eaton Rear Master Install Kit: Fits Most Chrysler/Dodge (92-10)
Eaton
Regular price
$191.61
$163.99
Sale
- Unit price
- /per
Eaton Master Install Kit (FRONT AND REAR): Fits Most Dodge 8.0L/5.9L Diesel/5.7L/5.2L/3.9L (94-02)
Eaton
Regular price
$263.47
$225.99
Sale
- Unit price
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Wehrli Grey Rear Diff Cover (REAR): Fits Most Dodge/Ram 6.7L Diesel/5.9L Diesel (03-18)
Wehrli
Regular price
$414.00
$401.58
Sale
- Unit price
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Wehrli Gloss White Rear Differential Cover: Ram 2500 / 3500 19-24 6.7L Diesel/6.4L
Wehrli
Regular price
$389.00
$377.33
Sale
- Unit price
- /per
Wehrli Red Rear Differential Cover: Ram 2500 / 3500 19-24 6.7L Diesel/6.4L
Wehrli
Regular price
$414.00
$401.58
Sale
- Unit price
- /per
Mishimoto Cast Transmission Pan Gunmetal Gray (BOTTOM): Fits Ram 2008-2023 6.7L Diesel
Mishimoto
Regular price
$417.00
$378.95
Sale
- Unit price
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Fleece Performance PowerFlo 750: Dodge Ram 2500 / Ram 3500 03-07 5.9L Diesel
Fleece Performance
$2,049.00
- Unit price
- /per
Fleece Performance PowerFlo 750: Fits Most Dodge/Ram 6.7L Diesel/5.9L Diesel (07-18)
Fleece Performance
$1,999.00
- Unit price
- /per
Fleece Performance CP3K Fuel Pump: Fits Most Dodge/Ram 6.7L Diesel/5.9L Diesel (07-18)
Fleece Performance
$1,399.00
- Unit price
- /per
Fleece Performance CP3K Fuel Pump: Dodge Ram 2500 / Ram 3500 03-07 5.9L Diesel
Fleece Performance
$1,449.00
- Unit price
- /per
Fabtech Transmission Mount Bracket: Dodge Ram 2500 / Ram 3500 06-07 5.9L Diesel
Fabtech
$125.51
- Unit price
- /per
Fabtech Auto Transmission Mount Bracket: Fits Most Dodge/Ram 6.7L Diesel/5.9L Diesel (07-13)
Fabtech
$125.51
- Unit price
- /per
ARB Black Diff Cover D60/D50: Dodge Ram 2500 94-02 8.0L/5.9L Diesel/5.7L/5.2L
ARB
$219.95
- Unit price
- /per
ARB Airlocker Dana 44 30 Spl 3.92+ Diff (REAR): Fits Most Dodge/Jeep (91-06)
ARB
$1,299.95
- Unit price
- /per
ARB Airlocker Dana 44 30 Spl 3.73 & Down Diff (REAR): Fits Most Dodge/Jeep (91-17)
ARB
$1,299.95
- 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
- /per
ARB Airlocker Dana 60 32 Spl S/N: Dodge Ram 2500/Ram 3500 94-02 8.0L/5.9L Diesel/5.7L/5.2L
ARB
$1,399.95
- Unit price
- /per
ARB Airlocker Dana 60 HD 35 Spline 4.56 Up: Dodge Ram 2500/Ram 3500 94-03 8.0L/5.9L Diesel/5.7L/5.2L
ARB
$1,399.95
- 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.