Jeep Grand Cherokee

1993-1999 of release

Repair and car operation

Driveshafts, differentials and bridges - the general information

Driveshafts

The driveshaft serves for capacity transfer from transmission (2WD) or a transfer case (4WD) to the back bridge of the car. On all-wheel drive (4WD) models this driveshaft carries the name of the back. The second driveshaft of all-wheel drive models serves for capacity transfer from a transfer case to the forward bridge and is called as forward.

At car movement on a rough paving bridges start to "float" up-down therefore driveshafts work in the conditions of continuous change of a corner of the situation in relation to transmission / to a transfer case and suspension bracket bridges. Such mode of functioning appears possible thanks to inclusion in structure of shaft (from both of them the ends) kardanny hinges. Change of corners of position of driveshafts naturally conducts to need of continuous change of their length that is reached thanks to application of sliding holders of crosspieces.

On models of 1993 вып. in the forward driveshaft the kardanny hinge of a series 1310, and in a back shaft - the series 2950 hinge is established. Two types of kardanny knots - with one hinge and two hinges are used.

Components of typical kardanny knot of dvukhsharnirny type

On models of 1994 вып. on both (forward and back) driveshafts kardanny hinges of a series 1310 are applied. Again two types of kardanny knots - with one hinge, or with two are applied.

On models of 1995 вып. three types of kardanny knots - with one hinge, with two hinges and with the CV hinge are used. The CV hinge is not subject to repair; in case of damage of the hinge or its protective cover the driveshaft assembled should change.

On all-wheel drive models of 1995 вып. three types of the forward driveshaft are applied. Shaft of the First and Second types are equipped with odnosharnirny kardanny knots from the party turned to the bridge of a suspension bracket and dvukhsharnirny knots from a transfer case. The unique difference of one of these types of shaft from another is application of a various design of protection of holders of crosspieces from a dust and dirt. On the First type the dustproof cover whereas on the second the rubber cover is used is applied. Shaft of the Third type are not equipped by the sliding holder of a crosspiece. Instead of it in them the CV hinge established from the forward bridge is applied. Need for use of the sliding holder disappears in view of ability of the CV hinge to be compressed and extend. The shaft equipped with shlitsa in the CV hinge allows to support constantly length of the driveshaft in the course of car movement on optimum value. However, the full length of the driveshaft in this case is exposed in the course of its manufacturing. Do not try to make adjustment of length of the driveshaft of the Third type.

Fabrichno the established kardanny knots do not need greasing. Greasing of sliding holders of crosspieces of the forward driveshaft of all-wheel drive models 1993 and 1994 of вып. and driveshaft of the First type of models of 1995 вып. it should be made regularly, according to the schedule of routine maintenance of the car (Head of Control and routine maintenance). Sliding holders of crosspieces of such shaft are equipped for this purpose with the lubricant union of the ZERK type.

In the course of installation on the car careful and very exact balancing both forward, and back driveshafts is made. In view of the last, each time after removal shaft should be established into place in accuracy in the same way as they stood earlier. The neglect implementation of this requirement is fraught with development of strong vibrations and, as a result, serious damages of the transmission line of the car.

Differentials

The differential is located in the pig-iron case which, in turn, is an integral part of assembly of the bridge. The stamped steel cover приболчена to the open back party of the case also serves for ensuring access to its internal components in the course of survey and preventive maintenance. For represents transfer of gipoidny type the central line of a leading gear wheel in which is located below the central line of a conducted gear wheel of the main transfer. Except differential of a standard design on cars of this brand Trac-Lock blocks with blocking (only to back bridges of Model 35) can be established also. If one of wheels starts to revolve, having lost coupling with a paving, the Trac-Lock block starts to transfer its twisting percent to the opposite. In a type of need of application for adjustment and major maintenance of differentials of the special tool, and also existence of a certain qualification of the personnel, these works are a prerogative of experts of a workshop of car-care center or dealer office of the Chrysler company.

Bridges

Forward power shafts of all-wheel drive (4WD) are placed in a sleeve of forward Bridge Modeli 30. The bridge represents two steel sleeves, welded on the pig-iron central case in which differential assembly is placed. The block is equipped with the ventilation serving for dumping of superfluous internal pressure, arising owing to evaporation and thermal expansion of lubricant liquid. Peredny Bridge is equipped with power shafts of semi-floating type on which loading is perceived by bearings of naves. Shaft fasten to bearings of naves by means of nuts. Service of bearings is made only assembled, i.e. they are not subject to restoration. The external ends of power shafts are equipped with hinges of equal angular speeds (CV hinges) that provides possibility of turn of forward wheels to the right-to the left. Besides, the bridge is equipped with system of anti-blocking of brakes (ABS). ABS sensors are fixed in assemblies of rotary fists; rotors of sensors are pressed in shaft near flanges of naves. Outside to a cover of the case of differential of Bridge Modeli 30 fastens шильда with data on serial number and transfer number. The identification code of a date of issue of the bridge is beaten out behind on its sleeve. At bridge replacement always consider these data.

Back semi-axes (all models) are placed in sleeves of Bridge Modeli 35 which is almost identical on a design to assembly described above Model 30 of the forward bridge. Sometimes Bridge Modeli 35 can be in addition equipped with the Trac-Lock block and differential of limited sliding. Serial number and transfer number of differential of Bridge Modeli 35 can be besides found on fixed on a differential cover шильде. The code of date of manufacturing is beaten out on the back party of a sleeve. All these data surely should be taken into consideration at bridge replacement.

Fuller information on a beam of the forward bridge of not all-wheel drive (2WD) of models, sleeves of the forward bridge of 4WD models and sleeves of the back bridge of all models can be found in Head the Suspension bracket and a steering.