Stage 6 Allison LCT1000 Crate Transmission

Features:

• Complete Stage 6 transmission package
• PTO compatible for added versatility
• Includes Five Star torque converter
• Deep transmission pan improves cooling
• Features ATS Co-Pilot controller
• Billet input, output, and intermediate shafts
• Upgraded billet P2 carrier and C2 hub
• Modified P1 sun gear for extra strength
• Designed for high torque applications
• Ideal for heavy towing or performance builds
• $500 shipping surcharge applies

Ready for Big Power and Hard Work

If your LB7 Duramax is built to pull hard and push limits, the ATS Stage 6 Allison LCT1000 Crate Transmission is the upgrade that keeps up with your truck’s demands. Designed specifically for 2003 to early 2004 Silverado and Sierra 2500HD/3500HD models with 4WD and PTO, this transmission package delivers serious durability and performance where it matters most. From towing heavy loads through mountain passes to launching down the track, this setup is built to handle the stress without flinching. The heart of the package includes a fully upgraded Allison transmission paired with ATS’s Five Star torque converter for improved torque transfer and smooth, confident engagement under load.

Engineered for Strength, Tuned for Confidence

This isn’t just a stronger transmission—it’s a complete performance system. It comes with billet input, output, and intermediate shafts to prevent twisting and breakage under extreme torque. The billet P2 carrier and C2 hub add another level of strength, while the modified P1 sun gear ensures reliable operation even in high-stress situations. The ATS Co-Pilot transmission controller is included to fine-tune shift points and maintain consistent performance whether you’re cruising or working your truck hard. The deep transmission pan helps manage fluid temperature during long hauls or aggressive driving, and the PTO compatibility means you’re not giving up utility in the name of power. This package is made for diesel owners who demand more from their transmission without sacrificing everyday drivability. Just keep in mind, a $500 shipping surcharge applies with this setup, but it’s a small price to pay for the level of capability you’re getting.

Fits: 2003, 2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7 PTO 4WD