This document provides an overview of the Allison 1000/2000 series transmissions. It describes the key features and components including:
- Five speeds forward with overdrive fifth gear, plus reverse and neutral controlled electronically through six solenoids.
- Planetary gear sets and five clutch packs provide the gear ratios and shifting.
- Fully automatic operation controlled by the transmission control module (TCM).
- Common hydraulic system and oil pump provides pressure for clutches and lubrication.
- Variety of shift selector positions available depending on model and application.