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The Gates Micro-V high-capacity HD V-belt is a heavy-duty replacement for 1987–1998 Peterbilt 379 trucks with Caterpillar 3406 diesel engines, intended for alternator and A.C. accessory duties. Labeled HD to address higher accessory loads on heavy trucks, it follows factory routing for the listed years and serves as a direct-replacement during maintenance. The overview retains the specific truck and engine application.
Gates 87-98 Peterbilt 379 Caterpillar 3406 Diesel Alt. & A.C. High Capacity HD V-Belt
