Pacific Performance Engineering 128035511 Stage5G Allison Transmission Upgrade Kit Without Torque Converter

The Pacific Performance Engineering (PPE) Stage5G Transmission Upgrade Kit (PN 128035511) is a top-tier performance rebuild solution engineered for the GM Allison 1000, 2000, and 2400 Series transmissions found in 2001–2004 6.6L Duramax LB7 trucks. This kit is sold without a torque converter, making it ideal for builders who already have a compatible converter or wish to source one separately.

Key Features:

• Valve Body Recalibration Kit — Increases clutch holding power without altering factory shift points for a smooth, streetable driving experience
• Converter Flow Valve — Optimizes fluid flow through the transmission for improved efficiency and reliability under load
• Upgraded C1, C2, C3, and C4 Clutches — High-friction clutch packs paired with Kolene-treated steels for superior heat resistance and clamping force
• Boost Valve and Pump Shim — Included for a complete, straightforward installation
• Necessary Gaskets Included — Everything needed for a full rebuild is packaged together
• 50 States Emissions Legal — Certified under CARB Executive Order E.O. D-701-18

Built to withstand the demands of street driving, heavy towing, sled pulling, and drag racing, the Stage5G kit represents one of PPE's most capable Allison transmission upgrade solutions. The "G" designation reflects PPE's updated generation of Stage 5 components, featuring refined friction materials and improved internal geometry for maximum durability under high-horsepower and high-torque conditions. Kits may vary in clutch quantity, thickness, and material based on specific transmission configuration requirements.

PPE's Stage5G kit is an excellent choice for LB7 Duramax owners running performance-modified engines with upgraded injectors, performance tuning, or forced induction enhancements who demand a transmission that can reliably handle elevated power output.