Product description
Recommended to add transmission cooler & Billet Flexplate to order.
Sales Tech will call to verify build details.
Stage 2 Allison Transmission for Chevy & GMC Duramax Trucks
Built for Serious Towing and Heavy-Duty Work
The Stage 2 Allison 1000 is designed for drivers who depend on their truck to handle demanding loads without sacrificing reliability. From pulling a loaded trailer through steep grades to hauling an RV across long distances, this transmission is built to stay strong under pressure while delivering smooth, consistent power.
Engineered for Performance
This upgraded Allison transmission focuses on both strength and refined power delivery. With precision-machined pressure plates, LML-style pistons, and enhanced return springs, it incorporates advanced components that help maintain dependable performance in tough conditions.
Key Features
Raybestos or ALTO G3 C-3/C-4 Torque Kit with Custom Pressure Plates — Maximizes holding strength and durability during high‑torque operation, reducing the risk of slip when the load gets heavy.
LML-Style Pistons & Return Springs — Improves shift quality and responsiveness, keeping the transmission stable even during demanding use.
Raybestos or ALTO G3 C-1/C-2 Torque Kit — High‑capacity clutches designed for increased holding power in performance‑focused builds.
Ratio Tek Pressure Enhancements — Fine‑tuned internal pressure for better power transfer and long-term reliability.
Transgo Trim Valves — Helps maintain proper fluid control, resulting in cleaner, more accurate shifts and reduced internal wear.
New Torrington Bearings — Low‑friction bearings that extend component life and improve overall efficiency.
Randy’s Torque Converter with Billet Stator — A heavy‑duty billet converter engineered for stronger torque multiplication and dependable performance under load.
New OE Filters — Ensures clean, consistent fluid flow to protect internal components and extend service life.
Heavy‑Duty Cast Aluminum Deep Pan — Adds fluid capacity for improved cooling during intense towing or hauling.
Custom Billet PTO Covers — Designed to optimize fluid direction and enhance internal efficiency.
Why Choose Randy’s Transmissions?
Every transmission we build goes through extensive testing to ensure long‑term reliability and consistent performance. Our Stage 2 Allison is assembled with meticulous attention to detail, giving you confidence whether you’re towing a fifth‑wheel or transporting heavy equipment.
Years of Development Behind Every Build
Randy’s Transmissions has dedicated years to refining and strengthening Allison builds for Duramax owners. Our ongoing research and hands‑on experience allow us to deliver products that meet and exceed real‑world demands.
2‑Year / Unlimited‑Mile Warranty
The Stage 2 Allison Transmission comes backed with a 2‑year, unlimited‑mile warranty for total peace of mind. Whether you’re working your truck hard or running higher power levels, you can trust that your build is protected and ready for the long haul.
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