SKU: ATS309-842-4290

Stage 4 Allison LCT1000 Crate Transmission

Ships From Manufacturer in 15-20 Days
Confirmed fitment below
YEARS
2004.5-2005
MAKE / MODEL
GM/Chevrolet/GMC / Silverado/Sierra
SERIES
2500HD/3500HD
ENGINE
6.6L Duramax LB7/6.6L Duramax LLY
Price
$8,314.99
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PRODUCT DETAIL

Key Features & Description

Features:

  • Complete Stage 4 transmission upgrade package
  • Includes ATS Five Star torque converter
  • Deep transmission pan improves cooling capacity
  • ATS Co-Pilot controller for improved shifting
  • Billet input shaft adds durability and strength
  • Billet intermediate shaft handles added torque
  • Designed for 2004.5-2005 LLY Duramax engines
  • Fits Silverado and Sierra 2500HD/3500HD trucks
  • 2WD compatible for rear-wheel drive models
  • Ideal for towing and performance applications
  • $500 shipping surcharge applies at checkout

Ready to Handle the Miles Ahead

If your 2004.5-2005 Duramax is still going strong but the stock transmission is starting to show its limits, the ATS Stage 4 Allison LCT1000 Crate Transmission is exactly what you need to bring new life to your truck. Designed for 2WD Silverado and Sierra 2500HD and 3500HD models with the LLY Duramax, this package takes proven ATS technology and wraps it into a complete, ready-to-install solution. Whether you’re towing heavy loads, stacking performance upgrades, or just trying to keep your truck reliable for the long haul, this transmission is built to keep up with everything you throw at it.

Complete Performance and Durability Package

Inside the crate, you’ll find more than just a transmission. ATS includes their Five Star torque converter to improve how your truck puts power to the ground. You also get a deep transmission pan that boosts fluid capacity and helps keep temperatures in check when you’re working your truck hard. The Co-Pilot transmission controller gives you better control over shifting and helps prevent premature wear by managing line pressure under load. On top of that, billet input and intermediate shafts are included to strengthen the drivetrain where it matters most. This 2WD-specific package arrives ready to install, with a $500 shipping surcharge applied at checkout to ensure safe freight delivery right to your door.

Fits: 2004.5, 2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY 2WD

Includes:

  • ATS 2WD 2004.5-2005 Allison LCT1000 Performance Transmission
  • ATS Allison LCT1000 Five Star Torque Converter (302-950-4248)
  • ATS Allison LCT1000 Deep Transmission Pan (301-900-4248)
  • ATS Co-Pilot Transmission Controller (601-924-4248)
  • Billet Input Shaft
  • Billet Intermediate Shaft

Note: $500 Shipping surcharge will be added at checkout

FITMENT GUIDE

Exact Fitment — Verify Your Year

Year RangesYears
Make
Model
Series
Engine
2004.5-2005
GM/Chevrolet/GMC
Silverado/Sierra
2500HD/3500HD
6.6L Duramax LB7/6.6L Duramax LLY

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