Product Description
CPP Extreme Duty G56 Transmission — Built for Tow, Tune & Longevity
CPP’s Extreme Duty G56 is a thoroughly re-engineered 6-speed manual for 2005–2018 Ram 2500/3500 Cummins trucks. It’s assembled with upgraded internals, precision-set clearances, and verified shift quality—purpose-built to handle diesel torque, frequent towing, and serious daily miles.
- Price: $6,995.00
- SKU: G56EX
- Core Charge: +$2,000 option (refund on approved core return)
- Reviews: 5★ average (2 reviews)
Why This Beats a “Basic Reman”
- Upgraded/hardened wear items for diesel load and heat
- Precision assembly with documented endplay/runout targets
- Matched top cover & shifter by year and drivetrain (2WD/4WD)
- 3-Year, Unlimited-Miles Craftsmanship Warranty
Vehicle Fitment
Designed for 2005–2018 Ram 2500/3500 equipped with the G56 6-speed manual. Choose 2WD or 4WD and your model year at checkout.
What’s Included
- Fully built CPP Extreme Duty G56 transmission
- Matched shifter/top cover (year-correct)
- Fill & break-in guide
- Core return instructions
Recommended Supporting Parts (Finish the install right)
- Shop all G56 clutch kits
- Valair OEM Replacement G56 (stock organic): NMU70G56
- South Bend G56-OR-HD (HD organic single disc): G56-OR-HD
- South Bend G56-OFEK (organic/feramic single disc): G56-OFEK
- South Bend SSDD3600CBG (Super Street dual disc): SSDD3600CBG
- Valair Quiet Street Dual Disc Ceramic: QG56DDSN
- Hydraulics (pre-bled master/slave): Valair NMU70HYD-03
Comparison Table
Feature | Factory G56 (Used/Core) | Typical Reman | CPP Extreme Duty |
---|---|---|---|
Internals | OEM, unknown wear | Mixed replacement | Upgraded/hardened selections |
QC & Testing | None | Basic checks | Runout, endplay & shift checks + build sheet |
Warranty | N/A | Limited | 3-yr, unlimited-miles craftsmanship |
Best For | Light use | Stock daily | Towing, tuned diesels, longevity |
Build-Sheet & QC Highlights
- Input/output shaft runout and endplay within CPP spec
- Shift rail detent & synchronizer function check
- Case/cover torque & seal integrity verification
- Road-test for shift quality prior to shipment
Shipping & Core
Choose freight and core-handling options at checkout. You can ship your core first, or add the refundable core charge (+$2,000) to speed up delivery. Return shipping pickup is available.
Warranty
3-Year, Unlimited-Miles Craftsmanship Warranty from CPP.
FAQ
Will this fit my truck?If you have a 2005–2018 Ram 2500/3500 with a G56 manual transmission, yes. Select 2WD or 4WD and your model year before adding to cart.
Do I need a clutch upgrade?
Stock power and light towing can use OEM-style kits. Tuned trucks, heavy tow, or oversized tires benefit from a rated clutch. See our G56 clutch kits.
What’s the break-in procedure?
Follow the included fill & break-in guide. Avoid abusive launches during initial miles and recheck for leaks/fasteners after heat cycles.
How does the core charge work?
You can ship your core first (no charge added) or add the refundable core charge to your order to ship the CPP unit sooner. Core must be acceptable—see instructions in the box.
Warranty Information
3 YEAR UNLIMITED MILES CRAFTSMANSHIP WARRANTYProduct Videos
Custom Field
Product Reviews
2 Reviews Hide Reviews Show Reviews
-
Long wait but worth it!
Have 2500 miles on it now and it still shifts smooth and does not make any noises. Transmission took a month longer to get than what was told when order was placed but was well worth it in the end.
-
It shifts smooth as silk
This trans shifts smooth as silk. No issues with the gears. I would definitely recommend the product to others. The only issue is the length of time it takes to get the product.