ATS 309-813-4290 Stage 1 Allison LCT1000 Crate Transmission | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY PTO 2WD

Features:

• Designed for 2004.5-2005 6.6L LLY Duramax
• Fits 2WD GM Silverado and Sierra trucks
• Includes ATS Five Star Torque Converter
• Comes with ATS Deep Transmission Pan
• Built for improved towing and durability
• Performance tuned for daily and light work use
• Enhances power transfer and shift quality
• Helps reduce heat with deep pan design
• Includes PTO compatibility for utility needs
• Direct fit upgrade for factory transmission
• Improves long-term drivetrain reliability
• $500 shipping surcharge applied at checkout

Unlock The Strength Your Duramax Was Built For

If your truck’s been working harder than ever and your stock transmission is starting to show its age, the ATS Stage 1 Allison LCT1000 Crate Transmission is a smart move forward. This complete upgrade is built specifically for 2004.5-2005 2WD Duramax LLY trucks and offers a strong balance of durability and everyday drivability. Whether you're towing equipment during the week or hauling toys on the weekend, this setup helps your truck handle the load with confidence. The included Five Star Torque Converter brings better torque multiplication and smoother shifts, giving your truck a more responsive and refined feel behind the wheel. You’ll also appreciate how the ATS Deep Transmission Pan helps reduce heat, which is one of the biggest enemies of transmission longevity. With a design focused on reliability and real-world performance, this package doesn’t just replace what you had, it significantly upgrades it. If you’re tired of worrying about weak shifts or rising temps under load, this is the kind of fix that actually delivers peace of mind.

Engineered To Handle More Than The Daily Grind

At the heart of the ATS Stage 1 package is a precision-built LCT1000 transmission tailored for the demands of your 6.6L LLY Duramax. This system is engineered to outperform factory specs, giving you a transmission that handles higher torque loads with improved consistency and reduced internal stress. The ATS Five Star Torque Converter features a billet cover and multi-disc clutch setup that enhances lock-up control, especially under heavy load conditions. Paired with the ATS Deep Pan, you gain increased fluid capacity and better thermal regulation, both crucial when dealing with prolonged towing or commercial-duty use. Built-in PTO compatibility ensures this transmission is ready for work truck applications requiring additional power accessories. Everything comes designed to integrate directly with your truck’s drivetrain, so installation is straightforward with no major modifications. This isn’t just a stock rebuild, it’s a well-rounded upgrade built to improve drivability, durability, and long-haul performance.

Fits: 2004, 2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY PTO 2WD

Notes:

• Designed specifically for 2004.5–2005 LLY Duramax engines
• Fits GM 2500HD and 3500HD 2WD models with PTO
• Includes ATS Five Star Torque Converter and Deep Transmission Pan
• Stage 1 transmission is ideal for light to moderate performance needs
• Offers improved torque handling over stock transmissions
• Transmission is performance built and not a stock replacement
• Requires proper fluid fill and break-in procedures for longevity
• Professional installation is highly recommended for optimal results
• PTO support is beneficial for work truck applications
• $500 shipping surcharge will be added at checkout