Twisted Street™ 6L90E Performance Transmission

Rated Up To 550 HP / 550 LB-FT at the Crankshaft

NEW Pump Assembly • High-Energy Clutches & Steels • Hydraulic Updates

STOCK-STALL TORQUE CONVERTER INCLUDED

The Twisted Street™ 6L90E is our upgraded street, work and towing build for vehicles equipped with the GM MYD 6L90.

Every unit is completely torn down, cleaned, inspected and rebuilt in-house. We verify the VIN, application, 2WD/4WD configuration, valve body and TECHM before the transmission is built.

Twisted Street™ 6L90E Build

✔ NEW Pump Assembly

Every Twisted 6L90 gets a NEW pump assembly.

We do not reuse the original pump on a fresh build.

✔ High-Energy Clutches & Matching Steels

All clutch packs are disassembled, inspected, rebuilt and properly clearanced.

• 1-2-3-4 — 6 Frictions
• 2-6 — 6 Frictions
• 3-5-Reverse — 5 Frictions
• 4-5-6 — 7 Frictions
• Low/Reverse — High-Energy Frictions & Matching Steels

✔ 6L90 4-5-6 Clutch Assembly

The correct 7-friction 6L90 4-5-6 clutch pack is rebuilt and clearanced.

The 6L90-specific hub and intermediate shaft are inspected for spline wear, heat damage and wear at the factory hub/shaft connection.

Higher-level Twisted builds receive upgraded 6L90-specific billet/300M hard parts.

✔ Complete Bushing Service

Bushings are replaced throughout the transmission to restore proper shaft support, oil control and internal clearances.

✔ Valve Body & Hydraulic Corrections

The correct early or late 6L90 valve body is identified before assembly.

Known hydraulic wear areas are inspected and corrected as required, including:

• TCC regulator circuit
• Pressure-regulator circuit
• Clutch-select circuit
• Clutch boost circuits
• Line-pressure control
• End-plug leakage

✔ Planetary & Hard-Part Inspection

We inspect the:

• Input and output planetaries
• Drums
• Shafts
• Hubs
• Stator support
• One-way clutch
• Lubrication passages
• Case and related hard parts

Serviceable OE hard parts are reused only when they meet our specifications.

✔ New Gaskets, Seals, Sealing Rings & Filter

Complete sealing service with the correct application filter.

STOCK-STALL TORQUE CONVERTER — INCLUDED

Every Twisted Street™ 6L90E includes a stock-stall torque converter matched to the vehicle application.

There is not one universal 6L90 converter.

Truck, van, CTS-V and Camaro ZL1 applications can require different converter configurations, so we match the converter to the actual vehicle and engine.

Converter Upgrades Available

• HD Billet-Cover Truck / Van Converter
• Billet Performance Converter
• CTS-V / Camaro ZL1 Performance Converter
• Custom Stall
• Multi-Disc Options

TECHM / Internal Electronics

The 6L90 uses several different TECHM hardware families.

We match the electronics by:

OE Number + Application + VIN

TECHM Options

Correct Blank TECHM — INCLUDED

or

Fully Programmed TECHM by VIN — Available Upgrade

Programming, Fast Learn and relearn procedures may still be required after installation depending on the application.

2WD & 4WD Configurations

The 6L90 uses different output configurations.

2WD

36-Spline Output

4WD / Transfer Case

29-Spline Output

We verify the actual transmission and drivetrain configuration before building.

Common 6L90 / MYD Applications

Chevrolet

• Silverado 2500HD / 3500HD 6.0L Gas
• Silverado 2500HD / 3500HD 6.6L L8T Gas
• Express 2500 / 3500
• Heavy-Duty Suburban Applications Equipped With MYD
• Camaro ZL1 Automatic

GMC

• Sierra 2500HD / 3500HD 6.0L Gas
• Sierra 2500HD / 3500HD 6.6L L8T Gas
• Savana 2500 / 3500

Cadillac

• CTS-V Automatic

Commercial

• Certain Isuzu Gas Chassis Equipped With GM 6L90

VIN & RPO Verification Required

RPO MYD = 6L90

RPO MYC = 6L80

Do not assume a vehicle has a 6L90 because a parts catalog groups the 6L80 and 6L90 together.

Corvette is not a 6L90 application.

Built For

• Daily Driving
• Work Trucks
• Towing
• Hauling
• Commercial Vans
• Fleet Use
• Stock Engines
• Mild Performance Builds
• Street-Driven Performance Cars

Power Rating

Up To 550 HP / 550 LB-FT at the Crankshaft

This rating is intentionally conservative because the 6L90 is used in everything from performance cars to heavy trucks and commercial vehicles.

Vehicle weight, tire size, gearing, tuning, converter choice and towing load all affect transmission load.

If your combination is over 550 HP / 550 LB-FT, heavily modified, used for racing, heavy towing or hard launches, contact us before ordering.

We may recommend a Twisted Pro™, Punisher™, Executioner™ or Xtreme™ 6L90E.

Twisted Torque™

Built for the application — not just the part number.

833-858-9612