5.9L / 6.7L Diesel Transmission Upgrades
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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ARB Airlocker 35 Spl High Speed Dana 70/80 Diff: 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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Revolution Gear & Axle 4.10 Ratio Gear Package: Dodge Ram (94-01)
Revolution Gear & Axle
$865.99
- 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
6% off
- Unit price
- /per
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
6% off
- Unit price
- /per
Eaton Helical LSD Detroit Truetrac Diff 31 Spline (REAR): Fits Most Chrysler/Dodge (92-10)
Eaton
Regular price
$891.29
$819.99
8% off
- 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
8% off
- 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
$255.80
$219.99
14% off
- Unit price
- /per
Wehrli Gloss Black Rear Diff Cover: Fits Most Dodge/Ram 6.7L Diesel/5.9L Diesel (03-18)
Wehrli
Regular price
$389.00
$377.33
3% off
- Unit price
- /per
Wehrli Gloss Black Rear Differential Cover: Ram 2500 / 3500 19-24 6.7L Diesel/6.4L
Wehrli
Regular price
$389.00
$377.33
3% off
- Unit price
- /per
Wehrli Rear Differential Cover (REAR): Ram 2500 / 3500 19-24 6.7L Diesel/6.4L w/ Grey
Wehrli
Regular price
$414.00
$401.58
3% off
- Unit price
- /per
Wehrli Gloss White Rear Differential Cover: Ram 2500 / 3500 19-24 6.7L Diesel/6.4L
Wehrli
Regular price
$389.00
$377.33
3% off
- 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
3% off
- Unit price
- /per
Mishimoto Cast Transmission Pan Gunmetal Gray (BOTTOM): Fits Ram 2008-2023 6.7L Diesel
Mishimoto
Regular price
$417.00
$378.95
9% off
- Unit price
- /per
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
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 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
ARB Airlocker Dana 60 HD 4.10 and Down S/N: 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 35 Spl Low Speed Dana 70/80 Diff: Dodge Ram 2500/Ram 3500 94-02 8.0L/5.9L Diesel/5.7L/5.2L
ARB
$1,499.95
- Unit price
- /per
ARB Airlocker 29 Spl Chrysler 8.25in Diff: Fits Most Dodge/Jeep 8.0L/6.1L/5.9L Diesel/5.7L/3.7L (95-10)
ARB
$1,299.95
- Unit price
- /per
ATS Diesel Aluminum +5 Qt Transmission Pan: Dodge Ram 2500 / Ram 3500 1994-2010
ATS Diesel
$344.99
- Unit price
- /per
ATS Diesel Governor Pressure Solenoid Block Conversion Kit: Dodge Ram 2500 / Ram 3500 1996-2007
ATS Diesel
$194.99
- Unit price
- /per
ATS Diesel Signal Conditioner: Dodge Ram 2500 / Ram 3500 1998-2002
ATS Diesel
$24.99
- Unit price
- /per
ARB Airlocker Diff 11.5in 30 Spline (REAR): Fits Most Dodge/Ram (03-19)
ARB
$1,299.95
- Unit price
- /per
ATS Diesel Billet Aluminum Transmission Filter Coupler: Ram 2500 11-12 6.7L Diesel/5.7L, Ram 3500 11-12 5.7L Hemi
ATS Diesel
$39.99
- Unit price
- /per
ATS Diesel Performance Valve Body: Ram 2500 11-12 6.7L Diesel/5.7L, Ram 3500 11-12 5.7L Hemi
ATS Diesel
$889.99
- Unit price
- /per
Exedy Stage 1 Organic Clutch: Dodge Ram 2500 / Ram 3500 05-10 6.7L Diesel/5.9L Diesel
Exedy
Regular price
$1,339.45
$1,138.50
15% off
- Unit price
- /per
Exedy Stage 2 Cerametallic Clutch w/ Cushion Button Disc: Dodge Ram 2500 / Ram 3500 05-10 6.7L Diesel/5.9L Diesel
Exedy
Regular price
$2,043.35
$1,736.80
15% off
- Unit price
- /per
Exedy Stage 1 Organic Clutch: Dodge Ram 2500 / Ram 3500 01-04 5.9L Diesel
Exedy
Regular price
$749.23
$636.83
15% off
- Unit price
- /per
Exedy Stage 2 Cerametallic Clutch w/ Cushion Button Disc: Dodge Ram 1500/Ram 2500/Ram 3500 01-04 5.9L Diesel/5.7L
Exedy
Regular price
$1,453.13
$1,235.13
15% off
- Unit price
- /per
aFe Power Pro Series Rear Differential Cover: Fits Most Dodge/Ram 5.9L Diesel/5.7L (03-13) (Machined)
aFe
$370.00
- Unit price
- /per
aFe Power Transmission Pan: Fits Most Dodge/Ram 6.7L Diesel/5.9L Diesel (07-14) w/ Black Machined Fins
aFe
$382.00
- 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.