Why does the Fast Gear 8-speed transmission always make noise when shifting?
2 Answers
The reason why the Fast Gear 8-speed transmission always makes noise when shifting is due to the shifting mechanism, which includes the gear lever, linkage rod, selector shaft, and selector fork. Here is an introduction to car shifting: 1. Introduction: It should be referred to as "gear shifting." Shifting refers to the transmission, which is used to change the torque and speed of the engine crankshaft. 2. Function: It adapts to the different needs of the driving wheels' traction and speed under various driving conditions such as starting, accelerating, driving, and overcoming road obstacles. 3. Technique: First, remember the principle of "accelerate before upshifting, decelerate before downshifting." Before upshifting, "rev" the throttle to increase the speed first, and before downshifting, "release" the throttle to reduce the speed first.
As a veteran truck driver with over 20 years of experience, I know all too well the frustration of gear grinding in Fast 8-speed transmissions. The key lies in clutch control—you must depress the clutch decisively without hesitation. If you hear grinding when starting in gear, first check the clutch pedal free travel—if it's too loose and doesn't fully disengage, gear shifts will definitely clash. If it particularly grinds during heavy-load hill climbs, chances are the auxiliary box synchronizer is worn out—once that copper ring wears smooth, you won't be able to engage gears. Last time I encountered grinding between 3rd and 5th gears, upon disassembly I found the shift fork shaft was worn and deformed. RPM matching in small 8-speeds is much more precise than in cars—for example, when shifting from 5th to 6th, wait until RPM drops to 1200 before engaging, and the throttle-clutch coordination should be as precise as keeping musical rhythm. Don't skimp on gear oil changes—using 85W-90 oil in winter with poor fluidity can also affect synchronization.
