Service of the Infiniti QX4 since 1996 of release
1. Introduction
2. Maintenance instruction
3. Routine maintenance
4. Engine
5. Cooling system and heating
6. Feed and control systems
7. Systems of start and charge
8. Transmission line
8.1. 4-staged automatic transmission
8.2. Transfer case
8.2.1. General information
8.2.2. Removal and installation of the transfer case
8.2.3. Removal and installation of a driving electric motor of the actuation mechanism of the transfer case
8.2.4. Replacement of an oil filter of the transfer case
8.2.5. Replacement of epiploons of an output shaft of the transfer case
8.2.6. Replacement of an epiploon of a rod of switching of the transfer case
8.3. Differentials, power shafts / half shafts
8.4. Driveshafts
9. Brake system
10. Suspension bracket and steering
11. Body
12. Electric equipment



8.2. Transfer case

The transfer case is installed behind the power unit. The torque of the engine is transmitted through transmission and the transfer case on lobbies and back driving shaft / half shafts by means of driveshafts.

On a design and the principle of action the transfer case used on the Infiniti QX4 models belongs to full-regime (All-mode) with electronic and hydraulic management — see the following illustrations:

The module of management of automatic transmission (TCM) acts as the think-tank. Failures of the system of 4WD are fixed in memory of the module of management and there can be schitana by means of the CONSULT scanner, or on signals of a control lamp. Failure diagnostics of AT and system 4WD has to be made in the conditions of a workshop of car service.

Authors of the present manual do not recommend to motorists to make in house conditions of attempt of independent performance of recovery repair of the failed transfer case. Work demands existence of special tools and a certain qualification of the performer. Nevertheless, independent performing procedures of removal and installation of the transfer case which description is provided further will allow in an essential measure to cut down the expenses connected both with repair, and with replacement of the failed assembly.

Schematic diagram of functioning of a control system of AT/4WD

Basic principles of functioning of the transfer case

Function chart of a hydraulic contour of management of system 4WD

Function chart of a control system of 4WD

"on the page back
8.1.11. Capital repairs of AT
on the following page"
8.2.1. General information