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Allison Transmission AT Series User Manual

Allison Transmission AT Series
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iii
TABLE OF CONTENTS
Page
INTRODUCTION
Warnings, Cautions, And Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
Keeping That Allison Advantage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Typical AT, MT, And HT Model Transmissions . . . . . . . . . . . . . . . . . . . . . . . . . 2
A Brief Description Of The Allison Automatic . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Torque Converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Lockup Clutch (AT 1500, MT(B) 600, HT 700) . . . . . . . . . . . . . . . . . . . . . . . . . 3
SHIFT SELECTORS
Allison Automatics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Typical AT, MT, HT Shift Selector Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Range Selection — AT 500 Series And AT 1500 Series With A Second
Neutral (Park) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Range Selection — AT 500 Series And AT 1500 Series Without A Second
Neutral (Park); MT 640, MT(B) 643, MT 643R, MT(B) 644, MT 647;
HT 740, HT 747. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Range Selection — MT 650; MT(B) 653DR . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Range Selection — HT 750CR, HT 754CR, MT(B) 654CR . . . . . . . . . . . . . . . . 13
Range Selection — HT 750DR, HT 750DR DB . . . . . . . . . . . . . . . . . . . . . . . . . 15
DRIVING TIPS
Throttle Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Downshift Inhibit Feature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Operating In Cold Weather. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Using the Engine For Downhill Braking To Slow The Vehicle
Or Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Using The Hydraulic Retarder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Auxiliary Transmission. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Two-Speed Axle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Towing Or Pushing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Parking Brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Driving On Ice Or Snow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Rocking Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Temperatures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

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Allison Transmission AT Series Specifications

General IconGeneral
BrandAllison Transmission
ModelAT Series
CategoryMicrophone system
LanguageEnglish

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