SLIDING MESH GEARBOX

                                                            SLIDING MESH  GEARBOX

The sliding mesh gearbox which is the simp

lest and oldest historically consist of three shaft and a set of gears and gear selecter mechanism and gear shift lever.The engine is coupled through the clutch and clutch shaft,to short gearbox input shaft.this shaft carries a pinion.a lay shaft or counter which is arranged parellel to the gearbox shaft carries five wheels of different sizes.These are the driven gear,third speed gear.second speed gear,first speed gear and reverse gear.The gearbox shaft pinion meshes continuously with the driven gear on the lay shaft.There is a transmission main shaft(gearbox output shaft)in the line with the gearbox input shaft.This shaft is supported at one end in a ball bearing housed in the casing,and at the other end by the spigot which is part of transmission shaft and which fix in a bushed hole in the gearbox input shaft.There are 2 gears on the main shaft.These gears maybe shifted back and fourth along the splines on shaft,by operating gear shift lever in the driver compartment.The splines are matching internal and external teeth that permit end wise movement of the gears but caused gears and main shaft to rotate together.The transmission main shaft is connected by the propeller shaft,gears in the final drive and differential mechanism and axial shaft to the wheels of the vehicle.

watch working of sliding mesh gearbox