This manual is the operator's manual of Allison Transmission AT, MT, HT series on-highway transmissions. The main content includes the operating instructions, maintenance and repair instructions, and fault troubleshooting instructions.
This manual provides operating instructions for Allison Transmission AT, MT, and HT series on-highway automatic transmissions. It covers the introduction to the transmission system, including the torque converter and lockup clutch, and explains how to use the shift selectors for various models.
The document also includes driving tips for throttle control, cold weather operation, and using the engine for downhill braking. A significant portion is dedicated to care and maintenance, detailing periodic inspections, fluid checks (cold and hot), and recommended fluid types and change intervals.
| Document Revision | Revision 2 |
|---|---|
| Document Number | OM1334EN |
| Print Location | U.S.A. |
The torque converter multiplies engine torque during starts and acts as a hydraulic cushion between the engine and gearing.
The lockup clutch engages automatically after the vehicle is moving and the torque multiplication demand is low.