Transmission: 1 - filler plug; 2 - reverse light switch; 3 - gearbox housing; 4 - breather; 5 - load of the gear shift mechanism; 6 - gear shift lever; 7 - clutch housing; 8 - gear selection lever; 9 - speed sensor; 10 - left wheel drive oil seal; 11 - cover; 12 - drain plug.
Gearbox identification number
The identification number of the gearbox H51973 337661 is decoded as follows:
- H - type (H: M5AF3);
- 5 - year of issue (2005);
- 1973 - final drive ratio code (1973: gear ratio 3.842; 2073: gear ratio 3.650;
- 337661 - serial number (000001-999999).
The gearboxes of the 1.3 liter and 1.6 liter engines differ in the gear ratios of the final drive.
The gearbox converts the torque transmitted from the engine in magnitude and direction. This is necessary to ensure optimal speed and flotation of the vehicle, as well as for the most economical operation of the engine and reversing of the vehicle. In addition, the gearbox separates the engine and transmission when the vehicle is stopped and parked, and when it coasts with the engine running.
The gearbox parts are housed in the crankcase, which is bolted to the rear of the engine.
Torque from the engine through the clutch is transmitted to the input shaft of the gearbox. The output shaft of the gearbox transmits torque through the differential to the drive shafts. The gear is engaged by moving the synchronizer sliding clutch, as a result of which the gear is rigidly connected to the gearbox shaft.
The gearbox is a very complex unit and its repair must be carried out in a specialized workshop, so this chapter only shows the removal and installation of the gearbox.
To remove the gearbox, raise the vehicle and secure it in this position. It is also necessary to use a stationary jack.
Manual Transmission
Transmission (installation information)
The gear ratios of the gearbox aggregated with various engines are shown in the table.
Gear ratios of a manual transmission
Gearbox transmission | Engine capacity, l | |||
1,1 | 1,3 | 1,5 | 1,6 | |
I | 3,615 | 3,615 | 3,615 | 3,615 |
II | 1,950 | 1,950 | 1,950 | 1,950 |
III | 1,286 | 1,286 | 1,286 | 1,286 |
IV | 0,971 | 1,030 | 0, 971 | 1,031 |
V | 0,780 | 0,825 | 0,825 | 0,825 |
Reverse | 3,250 | 3,250 | 3,250 | 3,250 |
main gear | 4,294 | 3,842 | 3,650 | 3,650 |
The following special tools and fixtures are required for repair and maintenance of the gearbox:
- traverse for hanging the engine when removing and installing the gearbox (part number for spare parts and accessories 09200-38001);
- a set of traverse supports for hanging the engine when removing and installing the gearbox (spare parts and accessories catalog number 09200-1С000).
Data for checks and adjustments, mm
Axial clearance of the rear bearing input shaft | 0,01-0,09 |
Axial clearance of secondary bearing shaft | 0,05-0,10 |
Bearing preload differential | 0,15-0,20 |
Axial clearance of pinion main gear | 0,025-0,15 |
Axial clearance of the front bearing input shaft | 0,01-0,12 |