| Item name | Spare part catalog number | Description |
| 1 | - | Protective cap |
| 2 | - | Mounting sleeve assembly |
| 3 | - | Sealing |
| 4 | - | Bearing assembly |
| 5 | - | Front tube |
| 6 | - | Bolt, 4 pcs. |
| 7 | - | Sealing ring |
| 8 | - | Drain plug |
| 9 | - | Bolt, 14 pcs. |
| 10 | - | Cover assembly |
| 11 | - | Lid seal |
| 12 | - | Outer ring of roller bearing |
| 13 | - | Bearing preload spacer sleeve |
| 14 | - | Tapered roller bearing |
| 15 | - | Bolt, 10 pcs. |
| 16 | - | Differential housing |
| 17 | - | Cylindrical pin |
| 18 | - | Gear assembly |
| 19 | - | Tapered roller bearing |
| 20 | - | Outer ring of roller bearing |
| 21 | - | Washer |
| 22 | - | Deformable spacer sleeve |
| 23 | - | Outer ring of roller bearing |
| 24 | - | Tapered roller bearing |
| 25 | - | Oil seal |
| 26 | - | Internal deflector |
| 27 | - | External deflector |
| 28 | - | Flange |
| 29 | - | Pinion Nut Lock |
| 30 | - | Pinion Nut |
| 31 | - | Mounting sleeve assembly |
| 32 | - | Bridge support bracket |
| 33 | - | Information sign |
| 34 | - | Breather tube |
| 35 | - | Lid |
| 36 | - | Filler plug |
| 37 | - | Bolt, 3 pcs. |
| 38 | - | Tapered roller bearing |
| 39 | - | Bearing preload spacer sleeve |
| 40 | - | Outer ring of roller bearing |
| 41 | - | Thrust washer |
| 42 | - | Planetary gear |
| 43 | - | Shaft |
| 44 | - | Sun gear |
| 45 | - | Thrust washer |
| 46 | - | Mounting sleeve assembly |
The housing consists of two halves with machined contact surfaces. When assembled, the joint between the cast iron halves of the housing is sealed with a thin film of Loctite 5999 sealant, and the halves themselves are fastened with 14 bolts. A breather tube is connected to the housings. This allows you to install a plastic tube and bring it out at a high point in the engine compartment to prevent water from penetrating when the car is fording.
The right half of the housing is equipped with a drain plug. The capacity of the front differential is approximately 0.7 l when dry.
The differential is a traditional hypoid gear design. It uses a driven gear and a bevel hypoid pinion gear that is offset upward relative to the driven gear axis. This design allows for a larger pinion gear, which increases its strength and reduces noise during operation.
There are 3 types of front differentials with different gear ratios. In cars with V8 and V6 petrol engines, a front differential with a final drive ratio of 3.73:1 is used. In cars with a Tdv6 diesel engine and an automatic transmission, the final drive ratio is 3.54:1, and with a manual transmission - 3.07:1. Changing the number of teeth between the driven gear and the driving gear of the final drive leads to a change in the gear ratio.
The differential consists of a pinion shaft, a hypoid bevel gear, and a driven gear of the main transmission with an integrated housing containing 2 planetary gears. The housing also contains 2 sun gears that transmit torque to the drive shafts.
The pinion shaft is mounted on two opposing tapered roller bearings with a deformable bushing between them. The bushing is used to center the bearings and is also deformed when force is applied to the pinion nut. This allows the nut to be tightened to a specified torque, at which the bushing is deformed, providing the necessary bearing preload.
The pinion shaft has an externally splined outer end that engages with the primary flange, which is secured with a pinion nut. The opposite end of the output flange has internal splines for rigid fixation of the front propeller shaft. The flange is equipped with an external annular seal that seals the protective cover of the front propeller shaft to prevent dirt and moisture from entering the splines. A seal is pressed into the left crankcase that seals the connection of the primary flange with the differential. A bevel hypoid gear is installed at the inner end of the pinion shaft that engages with the driven gear of the main transmission.
The driven gear is located on the cup and secured with 10 screws. The cup is mounted on tapered roller bearings located in each half of the housing. The bearings are pressed into the housing, and a spacer sleeve is installed on the outside, adjusting the lateral clearance and providing bearing preload.
(The article was taken from this resource: «LRman.ru»)
The cup is equipped with a shaft on which 2 planetary gears are fixed. The shaft is fixed to the cup with a cylindrical pin. The sun gears are located in the cup recesses and engage with the planetary gears. Thrust washers are installed between the sun gears and the cup, which ensure the engagement of the sun gears with the planetary gears. Each sun gear has a machined splined hole for the drive shaft. A groove is machined in the hole for a retaining ring, which is installed on the drive shaft, ensuring its rigid fixation.
Comments on this article