🔥 Twisted Pro™ 6L80E Performance Transmission — 550 HP

More Clutch Capacity. Stronger Holding Power. Built the Twisted Torque™ Way.

The Twisted Pro™ 6L80E is our 550 HP performance transmission for GM cars, trucks, and SUVs running modified engines that demand more clutch holding power than a standard performance rebuild.

Every Pro includes the factory-weakness corrections found in our Twisted Street™ build, with increased 3-5-Reverse and 4-5-6 clutch capacity and performance-matched pressure control for higher horsepower applications.

Every unit is completely torn down, cleaned, inspected, and rebuilt in-house with updated factory parts, high-energy performance clutches, new matching steels, and a NEW pump and bellhousing assembly.

We finish every build with our Super Duty Billet Cover Torque Converter at factory stall speed — INCLUDED.

Performance Rating: Up to 550 HP

⚡ TEHCM PROGRAMMING — INCLUDED

Every 6L80E includes a programmed TEHCM matched to your application. Factory replacements are programmed using your vehicle's VIN. Engine swaps and aftermarket applications may require a compatible donor VIN or base calibration. If you require a BLANK, unprogrammed TEHCM, just let us know when ordering. Installation Fast Learn or additional vehicle tuning may still be required.

⚙️ TWISTED PRO™ 6L80E BUILD SPECIFICATIONS

✔ Complete Teardown, Cleaning & Inspection

Every transmission is stripped down to the bare case. We clean and inspect the clutch drums, shafts, planetary gearsets, hubs, and internal parts for cracks, worn splines, damaged surfaces, and excessive wear before assembly.

✔ NEW Pump & Bellhousing Assembly

Every Twisted Pro™ receives a NEW pump and bellhousing assembly, not a reused or resurfaced original.

The pump supplies the fluid pressure needed to apply the clutches and keep the transmission lubricated. Starting with a new assembly addresses common problems associated with worn pump bodies, damaged pump surfaces, and worn pressure-regulator bores.

✔ High-Energy Performance Clutches & NEW Steels

We install high-energy performance friction plates with new matching steels, selected for the application.

PRO UPGRADE: Increased friction capacity in the 3-5-Reverse and 4-5-6 clutch assemblies provides additional holding surface for higher engine torque and demanding driving conditions.

✔ Updated 1-2-3-4 Clutch Assembly

The 1-2-3-4 clutch is rebuilt with new performance frictions, matching steels, and an updated apply piston.

The original factory piston is known to crack, causing pressure loss and slipping in forward gears. We correct this weakness rather than reusing the early design.

The clutch housing, snap-ring grooves, wave plate, and retaining rings are checked for the proper updated arrangement.

Clutch pack clearance is measured and set during assembly.

✔ PRO UPGRADE — High-Capacity 3-5-Reverse Clutch & Drum

Additional Friction & Steel Plate — Increased Clutch Holding Capacity

The 3-5-Reverse clutch receives an upgraded high-capacity apply-ring arrangement, allowing an additional friction and steel plate over our Street build.

The increased clutch surface helps hold higher engine torque and handle the added heat produced during harder acceleration.

We inspect the drum for cracked welds, damaged snap-ring grooves, worn splines, and other common failure points. Updated drum parts are installed where applicable, and the clutch pack is measured and clearanced for the selected high-capacity arrangement.

✔ PRO UPGRADE — High-Capacity 4-5-6 Clutch Assembly

Additional Friction Capacity — High-Capacity Apply Piston & Heavy-Duty Backing Plate

The 4-5-6 clutch receives an upgraded high-capacity apply-piston arrangement that allows an additional friction plate over our Street build.

The additional clutch surface provides increased holding power, while the heavy-duty backing plate helps resist flexing and uneven clutch application.

The clutch pack is measured, clearanced, and checked for proper engagement before assembly.

✔ Updated 2-6 Clutch Assembly

The 2-6 clutch is rebuilt with new frictions and steels, using the updated friction design where applicable.

We inspect the apply piston, seals, and related parts for wear and damage.

Clutch clearance is measured before assembly.

✔ Updated Low/Reverse Clutch & Sprag

The Low/Reverse clutch is rebuilt with new friction plates, matching steels, and seals.

Early 30-element low-sprag designs are updated to the later 38-element arrangement where applicable.

The sprag, races, and related parts are checked for wear or damage before installation.

✔ PRO UPGRADE — Pump & Valve Body — Modified & Updated the Twisted Torque™ Way

The valve body is completely disassembled, cleaned, inspected, and recalibrated to correct common factory pressure-control problems.

Pro receives performance-matched pressure-control adjustments for the increased 3-5-Reverse and 4-5-6 clutch capacity.

These adjustments provide stronger clutch holding pressure under load while maintaining controlled, predictable shifts during everyday driving.

✔ TransGo TCC & Clutch-Select Valve Corrections

We correct known torque converter clutch regulator and clutch-select valve problems using TransGo updates.

These repairs improve converter lockup control and help prevent sticking clutch-select valves, converter cycling, low-speed shudder, and related shifting problems.

✔ Pressure Regulator & Boost Valve Updates

The pressure regulator and boost-valve system is inspected and corrected to address common factory pressure-control failures.

Pressure control is checked for proper clutch application, converter operation, and lubrication under increased engine load.

✔ Complete Bushing Replacement

New replaceable bushings are installed throughout the transmission.

Shaft support, bushing fit, and internal clearances are checked during assembly.

✔ New Gaskets, Seals & Sealing Rings

New internal gaskets, seals, and sealing rings are installed throughout the transmission to reduce internal pressure leaks.

✔ New Transmission Filter

A new transmission filter is installed with every build.

✔ Internal Hard Parts Inspected & Measured

Input and output shafts, clutch drums, hubs, planetary gearsets, sun gears, bearings, and related hard parts are inspected for cracks, wear, and damage.

Parts that do not meet our build specifications are repaired or replaced. Clutch packs are measured and air-checked before final assembly.

✔ Application-Specific Assembly & Setup

Each transmission is assembled for the correct vehicle, engine, drivetrain, and factory transmission configuration.

2WD, 4WD, AWD, car, truck, and specialty applications are verified before assembly.

💥 SUPER DUTY BILLET COVER TORQUE CONVERTER — INCLUDED

The factory 6L80 torque converter is one of the most common sources of transmission failure. When the converter clutch wears out, it can send metal through the pump, valve body, and rest of the transmission.

Our Twisted Pro™ includes a Super Duty Billet Cover Torque Converter, built for improved strength and dependable converter clutch operation.

The billet cover helps resist flexing under load while maintaining factory-style stall speed and everyday driving characteristics.

✔ Super Duty Billet Cover

✔ Factory Stall Speed

✔ Matched to Vehicle Application

✔ Included With Every Twisted Pro™ Build

🔥 BUILT FOR

• Daily-driven performance Chevrolet, GMC, Cadillac, Pontiac, and Hummer vehicles
• Tuned 5.3L, 6.0L, and 6.2L GM V8 engines
• Camshaft, intake, exhaust, and other common performance modifications
• Street-driven LS combinations and engine swaps
• Select mild boost or nitrous applications within the build's limits
• Performance towing and hauling within vehicle-rated limits
• Customers needing additional clutch holding power without aggressive race-transmission behavior

Performance Rating: Up to 550 HP

Vehicle weight, engine torque, tire size, tuning, modifications, and intended use are considered when determining the proper transmission build.

🚗 GM 6L80E VEHICLE APPLICATIONS

The Twisted Pro™ 6L80E is built for select Chevrolet, GMC, Cadillac, Pontiac, and Hummer vehicles originally equipped with the GM 6L80 / 6L80E six-speed automatic transmission (RPO MYC).

CHEVROLET

• 2009–2021 Silverado 1500 — Select 4.3L, 5.3L, and 6.2L applications
• 2009–2020 Tahoe — Select 5.3L V8 applications
• 2009–2020 Suburban / Suburban 1500 — Select 5.3L V8 applications
• 2009–2013 Avalanche — Select 5.3L applications
• 2010–2015 Camaro SS — 6.2L V8 automatic
• 2014–2017 Chevrolet SS Sedan — 6.2L V8 automatic
• 2011–2017 Caprice PPV — Select V8 automatic applications

GMC

• 2009–2021 Sierra 1500 — Select 4.3L, 5.3L, and 6.2L applications
• 2009–2020 Yukon — Select 5.3L V8 applications
• 2009–2020 Yukon XL 1500 — Select 5.3L V8 applications
• 2007–2014 Yukon Denali — 6.2L V8
• 2007–2014 Yukon XL Denali — 6.2L V8

CADILLAC

• 2007–2014 Escalade — 6.2L V8
• 2007–2014 Escalade ESV — 6.2L V8
• 2007–2013 Escalade EXT — 6.2L V8
• Early 2015 Escalade / ESV — Only vehicles verified with factory 6L80 (RPO MYC)

PONTIAC

• 2008–2009 G8 GT — 6.0L V8 automatic
• 2009 G8 GXP — 6.2L V8 automatic

HUMMER

• 2008–2009 Hummer H2 — 6.2L V8
• 2008–2009 Hummer H2 SUT — 6.2L V8

SPECIALTY 6L80 APPLICATIONS

Select Corvette, Cadillac XLR/XLR-V, and Cadillac STS-V vehicles were factory equipped with the 6L80, but these applications require separate fitment and performance-rating verification. Contact us before ordering.

IMPORTANT FITMENT INFORMATION

This listing is for the GM 6L80 / 6L80E (RPO MYC) ONLY. It is NOT a replacement for the 6L90E (RPO MYD).

Model years listed are general application ranges. Not every vehicle or trim within those years was equipped with a 6L80.

VIN and factory transmission identification are required before ordering.

🔥 NEED MORE THAN PRO?

The Twisted Pro™ 6L80E is built for tuned daily drivers and street performance applications up to 550 HP.

Running higher boost, nitrous, aggressive tuning, oversized tires, or regular track use?

Check out our Twisted Punisher™ and Twisted Executioner™ 6L80E Performance Transmissions for additional internal upgrades and higher horsepower capability.

Tell us the vehicle. Tell us the motor. Tell us the modifications. Tell us how you're actually going to drive it.

We'll help match the right transmission to your build.

📞 833-858-9612

Twisted Torque™ — Built for the Application. Not the Catalog.