Variable pressure range section actuator assembly

摘要

An auxiliary transmission section (14) shift control system (230)/method is provided which includes control members (246) to prevent auxiliary section synchronized clutch (92, 128) damage if the main transmission section (12) is engaged during an auxiliary section shift. Upon sensing (254, 256) synchronized jaw clutch assembly blocked position during a shift into the auxiliary section high-speed ratio, the force used to engage the high speed ratio is gradually reduced from a first (p*a224) to a considerably lower second (p*(a224-a222)) level.