Detroit DT12 Transmission Service Repair Manual

Covers: Detroit DT12 Automated Manual Transmission
Pages: 654
Format: PDF
File size: 393mb
Compatibility: Windows/Mac/Tablet/Smartphone
Notes: Bookmarked, searchable, printable, instant download

This downloadable manual contains common service, repair and troubleshooting procedures for Detroit DT12 transmissions. Detailed photos and illustrations, specifications, technical data, and step-by-step procedures are included in the manual. View the PDF manual on your computer/tablet, or print pages as needed.

Dated March 2020.

Topics:

• Introduction
• TCM
• Electronic Features
• Communication Protocols
• Transmission Special Requirements
• TCM Wiring Harness
• Parameter Lists
• DT12 Gear Ratios
• External Component Repair
• Air Pressure Sensor
• Countershaft Speed Sensor
• Oil Breather Vent
• Oil Plug Repair
• Oil Pump Cover
• Oil Screen
• Oil Temperature Sensor
• Output Shaft Seal
• Output Shaft Speed Sensor
• PTO
• Shift Actuator Seal
• Range Cylinder
• Range Position Sensor
• Speedometer Tone Ring
• TCM
• Shift Controller
• Wire Harness (Cascadia 125)
• Wire Harness (Western Star 5700)
• Yoke
• Disassembly/Reassembly for Base Transmission
• Programming After Complete Transmission Replacement
• Programming After TCM/AMT Replacement Only
• DT12 Learning Matrix
• Internal Component Repair
• Clutch Position Sensor
• Clutch Actuator Assembly
• Counter Shaft Brake Valve
• Counter Shaft Brake Piston Seals
• Input Shaft Seal
• Main Shaft Speed Sensor
• Pilot Bearing
• Range Group
• Range Piston Seal
• Split Rod Bushing Repair
• Split-Pin Bushing Repair Instructional Video (mp4 format)
• Removal of the Clutch
• Clutch Inspection and Measurement
• Installation of the Clutch
• Symptom Diagnostics – AMT Shift Controller Inspection
• Symptom Diagnostics – Clutch Inspection and Measurement
• Symptom Diagnostics – Engine RPM Flare During Upshifts
• Symptom Diagnostics – Input Shaft Pilot Bearing Measurement Specification
• Symptom Diagnostics – Oil Leaks
• Symptom Diagnostics – Output Shaft Yoke End Play
• Symptom Diagnostics – Transmission Failed Learn Procedure
• Symptom Diagnostics – Transmission Fluid Inspection
• Symptom Diagnostics – Range Up or Down Shift Issue
• Symptom Diagnostics – Range Piston Housing Inspection
• Symptom Diagnostics – Will Not Go Into Gear after Cold Soak
• SPN/FMI Codes