Abstract: A gear type transmission unit which includes a transmission unit housing, a bearing retainer mounted at a front wall portion of the transmission unit housing, and a first bearing held in the bearing retainer for supporting an input shaft, and is characterized by an upper portion of a bearing holding portion of the bearing retainer, formed to project toward the side of a gear speed changing mechanism. This projecting upper portion is formed with an oil groove for lubricating oil introduction, communicated with an oil hole for bearing lubrication formed in the bearing retainer.

Abstract: A vehicle gear transmission having an overdrive and reverse gear stages. The counter-overdrive gear and the counter-reverse gear on the countershaft are rotatably mounted on the countershaft and a synchronizing mechanism is provided between the counter-overdrive gear and the counter-reverse gear. The clutch hub sleeve of the synchronizing mechanism is actuated by a manual shift lever through a reversing lever which functions to reverse the direction of movement of the shift lever before the movement is transmitted to the clutch hub sleeve.