All-wheel drive vehicles are usually classified as SUVs. However, AUDI Allroad vehicles, while having all-wheel drive, remain representatives of their class and are not SUVs.
A well-known disadvantage of SUVs is the need to engage the rear-wheel drive only when driving on rough terrain. When driving on a flat road surface, this drive must be disengaged, because when turning, the radius of the front wheels is greater than the rear ones, and the car becomes difficult to control.
In AUDI cars this problem is solved by means of the so-called distribution (interaxle) differential (torsen distribution differential), developed by Gleason. Using this differential provides permanent all-wheel drive. There is no need to disconnect the differential, as is done in SUVs, when driving on a road with a smooth and hard surface (see illustration 1.0a).
The code, serial number and designation of the gearbox are stamped on its body (see arrows in illustration 1.0b).
1.0. Six-speed gearbox 01E
1.0a. Six-speed gearbox and Torsen differential:
1 - gearbox
2 - gearbox mounting bolts (6 pcs.). Tightening torque 25 Nm
3 - disc spring. The concave side of the larger diameter should face the washers
4 - washers
5 - pocket for transmission oil in - bolt with a head for a multi-sided socket wrench. Tightening torque 150 Nm
7 - inner ring of the primary shaft ball bearing
8 - pressure spring
9 - Torsen differential. Repair is possible only at the manufacturer
10 - bolt (5 pcs.). Tightening torque 25 Nm 11 - gearbox cover
12 - gasket. To be replaced after each dismantling
13 - centering sleeve (2 pcs.)
14 - gearbox
15 - drain plug thread
16 - magnet (2 pcs.) for catching metal particles
17 - bracket
18 - support bracket mounting bolts. Tightening torque 25 Nm
1.0b. Gearbox marking and data location
(The original version is on the portal AUDImanual)