Saturn – Automatic Transmission Service Group



Saturn TAAT - Automatic Transmission Service Group PDF

The Saturn TransAxle Automatic Transmission (TAAT) first appeared in the 1991 Saturn vehicles. The general design of the Saturn automatic transaxle is a parallel shaft front wheel drive transmission which also contains the final drive. The transaxle provides four speeds forward and one reverse using four multiple disc clutches, a four element torque converter with a lock up clutch, 1st gear sprag clutch, and a servo actuated dog clutch. The most significant departure from the traditional automatic transaxle comes from the use of electronic controls. This unit utilizes five electro-hydraulic actuators in conjunction with a powertrain control module (PCM) and it’s sensors to control shift timing, shift feel, and provide on-board diagnostics.

This manual will cover tear down and re-assembly of the transaxle along with basic diagnostics for both mechanical and electrical. Special items included in this manual are: powerflow application chart, actuator application chart, line pressure testing specifications and transaxle identification.

INDEX

  • TRANSAXLE FLUID
  • CLUTCH APPLICATION CHART
  • GENERAL DESCRIPTION AND OPERATION
  • DESIGN CHANGE INFORMATION
  • ACTUATOR INFORMATION
  • LINE PRESSURE CHECKS
  • ELECTRICAL DIAGNOSTICS
  • DIAGNOSTIC TROUBLE CODES (1991-1995)
  • WIRING PCM INPUTS AND OUTPUTS (91-94)
  • HYDRAULIC VALVES AND CIRCUITS
  • TROUBLESHOOTING CHARTS
  • TRANSAXLE DIS-ASSEMBLY
  • SUB ASSEMBLY OVERHAUL
  • SPRAG ROTATION
  • VALVE BODY OVERHAUL
  • TRANSAXLE ASSEMBLY
  • SPECIFICATION CHARTS
  • SPECIAL TOOLS
  • SCAN TOOL DEFINITIONS
  • NEW FEATURES:
  • 1996 AND UP OBD-ll TROUBLE CODES
  • GRIND OR BIND UP IN REVERSE
  • NEW ACTUATOR FOR 2000 AND UP
  • ERRATIC SHIFTS AND OR GEAR RATIO ERRORS
  • DELAYED AND OR NO REVERSE
  • DELAY IN DRIVE AND/OR BIND IN REVERSE

Language: English
Format: PDF
Pages: 120
Size: 10.7 Mb
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