650 HP 01-16 Allison 1000

TSP Performance Allison 1000 Performance Rebuild Kit – 650HP Rated

Designed for higher-power Allison 1000 trucks, this performance rebuild kit focuses on increased strength, improved hydraulic control, and long-term durability while maintaining excellent street and towing manners. Shift feel is firm, short, and consistent without being harsh, making it well-suited for daily driving, towing, and performance use.

This kit addresses known Allison 1000 weak points by strengthening critical components, improving pressure regulation, and upgrading clutch capacity to reliably support increased horsepower. To achieve the full horsepower capability of this kit, an upgraded torque converter is required.

Included components:

• Complete bushing kit

• Complete Torrington bearing kit

• Upgraded pressure control system

• Shift valve spring upgrades

• High-capacity trim springs

• Valve end sleeve upgrade

• Complete precision gasket and seal kit

• C1, C2, C3, C4, and C5 clutch packs

• New internal transmission filter

• Genuine Allison external spin-on filter

• New filter magnet

• Modified converter flow valve

• Billet shallow filter lock

• Billet PTO covers

• Sleeved C2 hub assembly

• Machined P1 sun gear for C2 hub upgrade

• Updated C3/C4 molded clutch apply piston

• Updated C3/C4 return spring assembly

• Internal harness bulkhead seal kit

• Internal harness case retainer

• Deep transmission pan for increased fluid capacity and cooling

All internal wear items are replaced during the rebuild process to ensure proper clutch apply and long-term reliability.

This kit is ideal for higher-power street trucks, tow rigs, and performance applications, with torque converter options available in both upgraded stock-stall and high-stall configurations to match your build and driving style.  Backed by a 2 year / 25,000 mile warranty.