ALLISON 1000/2000 – Automatic Transmission Service Group



ALLISON 1000 2000 - Automatic Transmission Service Group PDF

INTRODUCTION ALLISON 1000/2000 SERIES

Beginning at the start of production for the 2000 model year, General Motors introduced two new Allison automatic transmissions referred to as the 1000 Series and the 2000 Series, for light duty (8600-19850 GVW) and medium duty (19850-3000 GVW) commercial trucks.

The 1000 and 2000 Series transmissions both have helical cut planetary gear systems to minimize noise concerns and come in two different gear ratio configurations. The 1000 Series uses closer steps to improve the shift quality that we now expect from an automatic transmission. The 2000 Series uses wider steps to accommodate the greater vehicle weights associated with the 2000 Series. The gear ratios for both of the new units are shown in this Manual.

The 1000 and 2000 Series transmissions have a Park position, Reverse, Neutral and five forward speeds with 5th gear being overdrive, and are completely electronic shift controlled. Notice that the standard General Motors case connector has been utilized, and the Park/Neutral switch is exactly the same switch used currently on the THM 4L60-E transmission. Two different bottom pan configurations are also provided to make these units even more versitile. The 1000 and 2000 Series transmissions utilize five clutch packs (No Bands-No Freewheels) to obtain the five forward gears and reverse. This manual will cover the dis-assembly, rebuild of all components and re-assembly of both the 1000 and 2000 Series units.

Allison 1000 Applications:

Allison 2000 Applications:

  • B-7 bus
  • C-Series truck
  • Cheetah MMPV
  • F-Series truck (Ford F-650)
  • International XT Series

CONTENTS

  • CLUTCH AND SOLENOID APPLICATION CHART
  • TRANSMISSION IDENTIFICATION TAG INFORMATION
  • GENERAL DESCRIPTION AND OPERATION
  • ELECTRICAL OPERATION
  • THROTTLE POSITION SENSOR
  • NEUTRAL START BACK UP SWITCH
  • TRANSMISSION CONTROL MODULE CONNECTOR IDENTIFICATION
  • DIAGNOSTIC TROUBLE CODE IDENTIFICATION
  • SOLENOID IDENTIFICATION AND OPERATION
  • INTERNAL WIRING HARNESS SCHEMATIC AND RESISTANCE CHART
  • EXTERNAL WIRING HARNESS SCHEMATIC AND TERMINAL IDENTIFICATION
  • PRESSURE SWITCH ASSEMBLY IDENTIFICATION AND OPERATION
  • RETRIEVING DIAGNOSTIC TROUBLE CODES
  • LINE PRESSURE TESTS
  • BELL HOUSING OIL PASSAGE IDENTIFICATION
  • MAIN CASE “FRONT” OIL PASSAGE IDENTIFICATION
  • MAIN CASE “REAR” OIL PASSAGE IDENTIFICATION
  • OIL PUMP COVER OIL PASSAGE IDENTIFICATION
  • SHIFT VALVE BODY OIL PASSAGE IDENTIFICATION
  • MAIN VALVE BODY “TOP VIEW” OIL PASSAGE IDENTIFICATION
  • MAIN VALVE BODY “BOTTOM VIEW” OIL PASSAGE IDENTIFICATION
  • MAIN CASE “BOTTOM VIEW” OIL PASSAGE IDENTIFICATION
  • TRANSMISSION DISASSEMBLY PROCESS
  • COMPONENT REBUILD
  • TRANSMISSION CASE ASSEMBLY
  • OIL PUMP AND BELLHOUSING ASSEMBLY
  • FOUR DIFFERENT BELL HOUSINGS IDENTIFICATION
  • C1/C2 CLUTCH HOUSING ASSEMBLY
  • C1/C2 CLUTCH HOUSING SNAP RING IDENTIFICATION
  • VALVE BODY ASSEMBLY
  • SOLENOID AIR CHECKS
  • EXTENSION HOUSING ASSEMBLY
  • GEAR TRAIN PARTS
  • CASE CLUTCH PARTS
  • FINAL TRANSMISSION ASSEMBLY PROCESS
  • BOLT IDENTIFICATION CHART
  • TORQUE SPECIFICATION CHART

Language: English
Format: PDF
Pages: 120
Size: 8.37 Mb
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