
SKU: ALLISON-11UP
🔔 Important Notice: This product may be temporarily out of stock. Orders are still accepted, but additional processing time may be required before shipping. Contact us to confirm current availability.
TransGo shift improvement kit for the Allison 1000/2400, fitting 2011-2024 GM 6.6L Duramax (LML/L5P). Corrects shift feel and firms clutch apply pressure for improved durability under towing and performance use.
FrankBUILT transmissions only - unlimited miles
Continental U.S., restrictions apply
Every build assembled by our team
Team ready to help