Disconnect the cardan shaft from the secondary shaft flange by unscrewing the nuts of the elastic coupling mounting bolts from the gearbox side so that the elastic coupling remains on the cardan shaft.
Disconnect the rear propeller shaft from the final drive pinion flange.
Disconnect the intermediate support cross member from the body floor.
Remove the driveshaft assembly by removing the front driveshaft from the centering sleeve of the gearbox secondary shaft flange.
The installation of the cardan transmission assembly is carried out in the reverse order of removal, taking into account the following:
- after installing the driveshaft assembly, screw on the mounting bolts without tightening them and check the alignment of the driveshaft using the 6006-4 device or a template made by yourself;
- if necessary, adjust the centering by lateral displacement of the intermediate support (displacement of the mounting bolts in the oval holes of the mounting cross member) or by adjusting its height by placing washers on the bolts securing the intermediate support crossmember to the bottom of the body;
- apply a 2mm preload to the intermediate support towards the front of the vehicle by moving its crossmember before tightening the crossmember mounting nuts;
- to prevent deformation of the elastic coupling, tighten its bolts by turning the nuts while holding the bolt heads.
Note: The driveshaft is balanced when assembled. Therefore, if one of the driveshafts is damaged, the driveshaft assembly must be replaced.
On vehicles from the 1977 model year, the installation of the cardan transmission is carried out taking into account the following:
- check the condition of the front propeller shaft centering unit and, if necessary, lubricate it with Longterm 2 grease. If faulty, replace it;
- if there is a knocking or scratching noise in traffic, eliminate the play of the spline end of the front shaft by applying a special Loctite glue of a Non-green color to them. To do this, mark the position of the slots with the edge. Unscrew the clamping sleeve 1 (see photo) and remove the felt ring. Clean the slots and spray the activator type Activator Q on them. Apply special glue to the shaft slots. Assemble the driveshaft and tighten the clamping sleeve. The curing time of the special Loctite No.75 type adhesive is about 2 hours.
Warning: The driveshaft is balanced as an assembly, so the driveshaft must be returned to its original position when connecting the front and rear shafts.