Late-model GM trucks Archives - Transmission Digest
Magna Powertrain Transfer Cases, Part 4

Last month we discussed the design features and mechanical operation of the Magna Powertrain MP3023/3024 (RPO Code NQH), and this article reviews the electronic operation of these transfer cases and the diagnostic routines to troubleshoot problems. These are “active,” computer-controlled transfer cases, which are capable of biasing torque to the front wheels without driver input.