Stage 3 Allison LCT1000 Crate Transmission

Features:

• Fits 2001–2002 GM 2500HD/3500HD 2WD
• Designed for 6.6L Duramax LB7 engines
• Includes ATS Stage 3 LCT1000 transmission
• Comes with Five Star torque converter
• Billet input shaft for added durability
• Deep transmission pan increases fluid capacity
• Co-Pilot controller improves shift performance
• Built for towing and performance applications
• Improves torque handling and drivability
• Complete drop-in transmission upgrade package

Built for the Daily Grind and Heavy Pulling Power

If you drive a 2001–2002 GM 2500HD or 3500HD with the 6.6L LB7 Duramax and you're starting to push the limits of the stock transmission—or just want to future-proof your build—the ATS Stage 3 Allison LCT1000 Crate Transmission is the upgrade your truck deserves. This isn’t a patch job or a lightly refreshed unit. It’s a fully built, drop-in-ready transmission designed specifically for 2WD models that see hard use—whether that’s towing, hauling, or running with aftermarket tuning. Inside the package, you’re getting ATS’s performance-built LCT1000 transmission, engineered to handle increased torque with smoother, more precise shifts under load. Paired with the ATS Five Star torque converter, you’ll notice better throttle response, stronger lockup, and improved drivability in both unloaded cruising and under heavy trailer weight.

Reinforced Where It Counts, Controlled Like Never Before

What takes this transmission to the next level is what’s happening inside—and how it responds in real time. ATS includes a billet input shaft, specifically chosen to prevent failure under high torque conditions common with tuned diesels or heavy-duty towing. The deep transmission pan not only boosts fluid capacity but also helps keep operating temps in check, a crucial detail when working in hotter climates or pulling over long distances. Finally, the ATS Co-Pilot Transmission Controller brings it all together by optimizing shift timing and firmness based on load and throttle, reducing slippage and maximizing the life of your transmission. It’s a package built not just to survive hard use, but to make your truck feel tighter, smoother, and more confident in the process. Whether you're a working contractor or an enthusiast with a taste for torque, this Stage 3 system delivers the reliability and performance you need without compromise.

Fits: 2001, 2002 GM 2500HD/3500HD 6.6L Duramax LB7 2WD

Includes:

• ATS 2WD 2001-2002 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
  

Note: $500 Shipping surcharge will be added at checkout