一辆奔驰2026A型车,在行驶途中出现高、低档换档困难的现象,无论将操纵手柄由高档区换入低档区,还是由低档区换入高档区都会出现操作困难,甚至不能变换的现象。检查分析经检查,该车离合器工作正常。分解检查分动器顶端高低档变换助力缸,其活塞、低档进气管和活塞推杆轴均无锈蚀、破损或发卡的现象。拆下助力缸高、低档进气管, A Mercedes-Benz 2026A car, traveling in the high, low gear shift phenomenon, whether the handle from the high-end into the low-end zone, or from the low-end into the high-end area will be operating difficulties, or even can not change the phenomenon . Inspection and Analysis After checking, the car clutch is working properly. Decomposition check the transfer case top gear shift booster cylinder, the piston, low-end intake pipe and piston rod axis are no rust, damage or hairpin phenomenon. Remove the booster cylinder high, low intake pipe,