3.2.2. Gear wheels and gear shifting lever
On primary to a shaft of a mechanical transmission 5 or 6 gear wheels of a forward course (5-or a 6-step box) and one backing are executed. All leading gear wheels of a forward course are in continuous gearing with the corresponding conducted gear wheels. The part of gear wheels is executed for a single whole with shaft, others are established on needle bearings which provide silent rotation of gear wheels. At neutral position of the lever of gear shifting the torque from the leader to a conducted shaft is not transferred.
Gear wheels rotate freely while the lever of switching is in neutral situation. Inclusion of transfers is carried out by moving of the sliding coupling of the synchronizer therefore the gear wheel rigidly incorporates to transmission shaft. For this purpose on everyone for the corresponding gear wheels the synchronizers are established to a shaft.
That gear wheels entered into gearing with each other, the number of their turns should be balanced. It is reached by means of synchronizers which before gearing of gear wheels adjoin with each other and by a friction compare number of turns of shaft.
The number of turns of the first three transfers is less, than number of turns of the engine, number of turns of the fourth transfer (straight line) same, as at an engine shaft. At the fifth and sixth transfers the number of turns increases in comparison with number of turns of the engine. For a backing the additional gear wheel which changes the direction of rotation of a shaft serves. For prevention of possibility of casual inclusion of a reverse gear at advance on Passat cars the switching mechanism in which the reverse gear traditionally joins with preliminary pressing the lever down is established.
By means of the handle of switching choose the necessary transfer. The handle of switching is connected to a transmission means of drafts, vilochny pushers and levers.
Differential and transmission oil
The differential is connected to a transmission. It is established on two conic bearings between coupling and transmission cases. Two epiploons of different diameters condense places of an exit of shaft outside. The leading gear wheel of differential is fixed in the case and connected to gear wheels of shaft of a drive of wheels.
For greasing of details of mechanical transmissions long-term synthetic oil is provided. Unlike the engine oil in a transmission practically is not spent. If outside on a transmission there are traces потеков some no oil, means, its level did not go down. Nevertheless oil level is necessary for checking from time to time. In automatic transmissions level of working liquid can be checked only in the main transfer, level in a transmission should be checked on STOA by means of the special diagnostic device.
Check and repair
Oil can follow outside because of a leakage of consolidations. Check connections in the following places:
– between a transmission and the engine;
– a place of an exit of shaft from a transmission;
– stopper of a bulk opening;
– stopper of a drain opening.
All shesterenchaty knots of a transmission have very long service life. If the box fails, it is necessary for repairing in a technical center as the qualified experts by means of the special tool should carry out repair.
If you decided to carry out repair independently, consider that accuracy and very pure workplace are necessary for high-quality repair of a transmission. In addition repair will need the special tool.