Cause | Method of elimination |
Knocking in the driveshaft when starting off, during sharp acceleration or gear shifting | |
| Loosening of bolts and nuts securing the flexible coupling and cardan joint flanges | Tighten the nuts to the torques specified in subsection 3.4 |
| Increased circumferential clearance in the splined connection of the front propeller shaft | Check the gap size, if it is more than 0.30 mm, replace worn parts |
| Increased clearance in universal joint bearings | Repair the hinges by replacing worn parts |
Noise and vibration of the driveline | |
| Deformation of cardan shafts | Straighten on a press or replace the shafts |
| Misalignment of the mounting marks on the front shaft and the corresponding coupling | Remove the driveshaft and align the marks made during disassembly |
| Imbalance of cardan shafts | Check the balancing; if the imbalance exceeds 2.15 N·mm (220 gf mm), proceed as described in subsection 5.3.7 |
| Wear or damage to the centering sleeve of the flexible coupling flange and the centering ring of the secondary shaft of the gearbox | Replace the flexible coupling flange assembly with the bushing and the secondary shaft centering ring |
| Increased clearance in the intermediate support bearing | Replace the bearing |
| Damage to the intermediate support | Replace the support |
| Loosening the nuts securing the crossmember to the vehicle body | Tighten the crossmember mounting nuts |
| Increased clearance in cardan joint bearings or sticking of joints | Repair the hinges by replacing worn parts |
| Loosening of the seal collar of the flexible coupling flange | Press the seal and crimp its collar; if there is a grease leak, replace the seal |
| Loosening the front propeller shaft fork mounting nut | Disconnect the front shaft from the rear shaft and tighten the nut, then calk the nut |
| Insufficient lubrication of the spline connection | Lubricate the splined connection with FIOL-1 grease |
Grease leak | |
| Loosening of the seal collar of the flexible coupling flange, wear of the seal | Press the seal and crimp its collar, replace the worn seal |
| Damage or wear of cardan joint seals | Disassemble the hinges and replace the seals |
(The material is posted on the website: «VAZbook.ru»)