Allison 1000 Shift Kit 2011-2019

Overview

This is a shift correction and reprogramming kit for the Chevrolet, GMC, Duramax Allison1000 automatic transmission (2011-2019). Built to OEM specification and engineered as a direct-fit replacement for a professional-grade Allison1000 repair or rebuild. Every Allison1000 order ships fast and is backed by our support team.

What's Included

• recalibrated valve-body springs and valves
• checkballs and separator-plate components as applicable
• step-by-step installation instructions

Fitment

Fits Chevrolet, GMC, Duramax vehicles equipped with the Allison1000 automatic transmission, 2011-2019. Please confirm your transmission model and year before ordering to ensure correct fitment.

Common Symptoms & When to Use

Consider this Allison1000 part when you experience:

• soft, mushy or delayed shifts
• slipping or shift flare between gears under load
• harsh or erratic shifts and shift-related codes
• clutch and band burnup on towing or high-power builds

Specifications

• Transmission: Allison1000
• Year Range: 2011-2019

Quality & Service

In-stock parts ship fast; special-order items ship within 3 business days. Free shipping on orders over $70. Backed by Core Transmission Parts — your source for Allison1000 transmission parts.