To compensate for the difference in the number of wheel revolutions when turning, there is a differential in the rear axle gearbox. Depending on the model and year of manufacture, cars can be equipped with differentials of two different designs. A differential without limiting the difference in wheel revolutions and with a 25% limitation of the difference (limited slip differential) to improve the vehicle's cross-country ability when one of the wheels slips.
Rear axle components
1 — ring;
2 - spacer sleeve;
3 - rear roller bearing;
4 - front roller bearing;
5 — oil seal;
6 - flange nut;
7 - lock washer;
8 — anther;
9 — drive gear flange;
10 — differential box;
11 — pulse sensor wheel;
12 - driven bevel gear set;
13 - Hex bolt;
14 - spring retaining ring;
15 - spacer washer;
16 - disc spring;
17 — drive shaft gear;
18 — differential bevel satellite;
20 - expansion pin;
21 - spring retaining ring;
22-23 — drive shaft flange;
23 — boot;
26 - tapered roller bearing;
27 - spacer washer;
28 — ring;
29 - Hex bolt;
30 — main gear housing;
31 — cover;
32 - about laying;
33 - spring washer B10;
34 - Hex Bolt;
37 — speedometer pulse sensor;
38 — ring;
39 - mounting plate;
40 - safety cover;
41 — bolt;
46 - washer;
47 — bolt.
[Information obtained from this online resource BMWMAN.RU]