Manual transmission general information (Peugeot 405)

The BE type gearbox is housed in an aluminum alloy crankcase and attached to the left end of the engine. It consists of a gearbox, final drive and differential. The gearbox has five synchronized forward gears and one reverse gear. The gearbox housing consists of three parts made from die-cast aluminum alloy. There are two types of manual transmission on cars. Both types of gearboxes are similar and work as follows.

Torque from the crankshaft of the engine is transmitted through the clutch to the input shaft of the gearbox, on which the clutch disc is mounted. The input shaft is mounted on ball bearings. Further, the torque is transmitted to the secondary shaft, the right end of which is mounted on a roller bearing, and the left end on a ball bearing. From the secondary shaft, torque is transmitted to the differential and to the drive shafts. In the neutral position, the input shaft and output shaft gears rotate freely and do not transmit torque to the differential.

Synchronization of 1st and 2nd gears occurs on the secondary shaft, and synchronization of 3rd, 4th and 5th gears occurs on the input shaft. New Process synchronizers applied. Cast iron forks have a molybdenum coating on the bearing surfaces (5th gear forks are made of bronze).

The gearshift mechanism is operated by a lever located on the floor of the vehicle. The shift mechanism moves the corresponding fork, which moves the synchronizer and provides a rigid connection between the mainshaft gear and the mainshaft.

The differential is of the classic type, has two satellites and two side gears. The differential case is made of spheroidal cast iron. The slip rings of the satellites are made of polyamide saturated with molybdenum dioxide.