Randy's Transmissions - Allison 1000 6-Speed Stage 3 (900HP) Transmission + Torque Converter
Part # 311241033-L5P
Tow and Race Ready – Built for 900 HP
The Stage 3 Allison transmission is engineered for the Duramax owner who demands the best of both worlds: heavy-duty towing capability and high-performance racing readiness. Whether you’re pulling a heavy load or pushing your truck to the limits on the track, this transmission is built to deliver reliable performance with precision and power. Rated for up to 900 horsepower, the Stage 3 Allison is the ultimate transmission upgrade for serious Duramax enthusiasts.
Built for Strength and Performance
With custom-machined pressure plates, upgraded clutch packs, and billet components, the Stage 3 Allison transmission is designed to handle extreme power while maintaining smooth, reliable shifting. Our focus on durability and power delivery ensures that your truck is ready for any challenge, whether you’re towing or hitting the drag strip.
Top-Tier Components for Maximum Durability
- Raybestos or ALTO G3 C-3 and C-4 Torque Kit with custom-machined pressure plates
- LML Style Pistons and Return Springs for enhanced performance under heavy load
- Raybestos or ALTO G3 C-1, C-2 Torque Kit for increased clutch holding capacity
- Ratio Tek Pressure Upgrades for improved hydraulic performance and reliability
- Transgo Trim Valves for precise pressure control and enhanced shifting
- New Torrington Bearings for reduced friction and extended lifespan
- Randy’s Torque Converter with Billet Stator with custom stall options for towing or racing
- Billet Input Shaft for maximum torque transfer and durability
- Billet C-2 Hub to handle extreme power loads
- Heavy Duty Cast Aluminum Deep Pan for superior fluid cooling and capacity
Why Choose Randy’s Stage 3 Allison?
Randy’s Transmissions takes pride in building the most reliable, high-performance transmissions on the market. Our Stage 3 Allison transmission is rigorously tested to ensure it holds up under extreme conditions, whether you’re hauling a heavy load or putting your truck through its paces on the race track. We stand behind every transmission we build because we test what we sell.
Backed by Innovation and Experience
Years of research and development have gone into the Stage 3 Allison transmission to bring you unmatched performance and durability. When you choose Randy’s, you’re choosing a product that has been fine-tuned through countless hours of testing, ensuring you get the best possible transmission for your Duramax.
Warning: cores must be like-for-like - A 5-Speed core will not be accepted for a 6-Speed transmission or vice-versa.
