Contents: For vehicles with single-wheel drive…⤓ For vehicles with all-wheel drive…⤓ Front axle design elements (4WD) ⤓ Control and adjustment parameters ⤓ Lubrication (4WD) ⤓ Transmission oil level in the front…⤓
The front axle of a four-wheel drive vehicle consists of the main transmission installed in a housing fixed to the body, and drive shafts transmitting rotation to the wheels. The differential is offset to the left of the longitudinal axis of the vehicle.
Moreover, in order for the drive shafts to have a length close to the same, a so-called internal shaft is installed in the main gear housing, which is, in fact, an extension that compensates for the displacement of the main gear from the vehicle axis.
A special feature of the front axle in the all-wheel drive version is the presence of a mechanism that disconnects the right drive shaft from the front axle differential. Moreover, the front axle is disconnected in the transfer case, which contains a sensor (limit switch) for disconnecting the front axle. And the mechanism installed in the front axle, using a vacuum drive, disconnects the right drive shaft from the differential so that energy is not wasted on rotating the cardan shaft (via the overdrive) and the transfer case mechanisms associated with it. This reduces the resistance to rotation of the front wheels in the rear-wheel drive mode (2WD).
For vehicles with single-wheel drive (hereinafter 2WD)
For vehicles with all-wheel drive (hereinafter 4WD)
Front axle design elements (4WD)
1. Drive shaft (RH); 2. Inner shaft; 3. Drive for engaging/disengaging the right drive shaft from the front axle differential; 4. Overrunning clutch of the mechanism for disconnecting the right drive shaft from the differential; 5. DOJ - inner joint of the drive shaft
Control and adjustment parameters
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Lubrication (4WD)
Front differential oil performance package: oil for hypoid gears of GL5 group or higher according to API classification.
Viscosity:
- at temperatures above 10°C: SAE 90;
- at temperatures below 10°C: SAE 80W.
The amount of oil in the front axle gearbox: 1.2 l.
The amount of consistent grease placed in the inner CV joint: 125±10 g.
The amount of consistent grease placed in the outer CV joint: 120±10 g.
Transmission oil level in the front axle gearbox (4WD)
The transmission oil level should be at least 8 mm from the lower edge of the filler hole (as shown in Fig. M2 5.002). Tightening torque of the filler plug: 50±10 Nm.
