This Factory Service Repair Workshop Manual covers multiple generations of Toyota vehicles, specifically focusing on models equipped with the G58, R150, R150F, W55, and W56 transmission families. These transmissions, primarily 5-speed manual units with the R150F also offering 4WD capability, are found in a range of Toyota pickup trucks, 4Runners, and other vehicles from the 1980s and 1990s. These vehicles are known for their robust engineering and reliability, often paired with inline-4 or V6 naturally aspirated engines ranging from 1.6L to 3.0L, making them suitable for a variety of demanding applications.

This comprehensive manual provides detailed information essential for the maintenance and repair of these Toyota transmissions. It includes in-depth procedures for disassembly, assembly, troubleshooting, diagnostics, and component replacement, along with critical specifications, torque values, and diagrams. The manual also outlines general transmission maintenance, including recommended fluid types such as GL-3 or GL-4 Hypoid Gear Oil, fluid capacities of approximately 2.0-2.5 liters, and recommended viscosities of 75W-90 or 80W-90. This resource is designed to assist owners, mechanics, and technicians in ensuring the longevity and optimal performance of their vehicles.