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PDF-4X4 Download: Understanding & Diagnosing Today's Domestic 4x4 Systems
Understanding and Diagnosing Today’s Domestic 4X4 Systems by Pete Huscher is a technical guide published by the Automatic Transmission Rebuilders Association (ATRA). It provides technicians with the essential information needed to identify, describe, and diagnose modern domestic four-wheel drive and all-wheel drive systems.
The manual covers a wide range of systems from GM, Ford, and Chrysler, detailing electronic components, inputs, and outputs. It includes step-by-step diagnostic routines for popular transfer cases like the NVG233 and BW4405, as well as comprehensive disassembly/reassembly procedures, wiring schematics, and a "quick fixes" section for common field issues.