Sliding element design
1 guide sleeve
2 Hinge disc
3 Bolt M10
4 Bolt M10
5 Self-locking nut
6 Middle support
7 Deep groove ball bearing
8 Bolt M8
9 Duster
10 Dust
11 Retaining ring
12 Threaded sleeve
13 Serrated washer
14 Clamping ring
15 Bolt M10
16 Self-locking nut M10
17 Cross
Loosen threaded ring -arrow- with BMW tool 261040 a few turns. If this tool is not available, loosen the threaded ring with a pipe wrench.
Unbolt driveshaft from gearbox.
Vehicles with vibration damper: Remove vibration damper from gearbox. Rotate the vibration damper by 60°and attach it to the rubber sleeve. The vibration damper is removed together with the cardan shaft.
Front cross design
Support the gearbox on a wooden jack.
Remove transverse beam and gearbox mount.
Loosen the cross nuts.
Remove the driveshaft from the rear axle reduction gear. In doing so, block the shaft with a pry bar.
Attention: On constructions with a constant velocity joint, put a cap on the joint to protect it from dirt. Check grease filling.
Remove center support A.
Bend the cardan shaft downwards and pull it out of the centering pin in the gearbox. If necessary, push the shaft completely into the movable joint.
Attention: Do not separate the cardan shaft at the point of the sliding element.
Caution: Do not drop the cardan shaft. The rubber cuff of the constant velocity joint can be especially damaged.
Installation
In the presence of vibrations and noises, the cardan hall must be balanced in the workshop. In addition, you can check the angle of inflection of the cardan shaft.
Attention: The cardan shaft is balanced as a set and can only be replaced as an assembly. Replace worn cardan shafts.
Before installing, check the centering disk of the cardan shaft, if necessary, lubricate the disk with Moiykore Longtherm 2. Replace the damaged disk.
Push the propeller shaft with an assistant into the centering pin of the gearbox.
Screw on the center support with a tightening torque of 22 Nm. In this case, shift the middle support with an interference fit E = 4-6 mm in the direction of travel. Cardan shaft without sliding element: E = 2-4 mm.
Screw driveshaft to rear axle reduction gear. If possible, only the nuts or only the bolts on the flange side should be turned to avoid overtightening of the cardan shaft. Install new self-locking nuts with a tightening torque of 70 Nm.
CV joint design: Check seal, replace if necessary. Screw driveshaft to rear axle reduction gear.
Tightening torques:
- M8 bolts - 32 nm
- bolts M10 - 70 nm
Vehicles with front cross: Tighten new lock nuts to 70 Nm.
Screw the gearbox hanger and cross member, remove the jack.
On vehicles with vibration damper: Insert vibration damper by 60°.
Screw propshaft to gearbox with new self-locking nuts.
Tightening torques:
- bolts M8-8.8 - 45 nm
- bolts M10-10.9 - 70 nm
- bolts M12 - 80 nm
If possible, only the nuts or only the bolts on the flange side should be turned to avoid overtightening of the cardan shaft. Block the cardan shaft from turning with a pry bar.
On vehicles with automatic transmission: Screw on the gearbox suspension.
Tighten the threaded ring to 17 Nm. If there is no special tool, tighten with a pipe wrench.
On vehicles without sliding element: Screw the yoke to the bearing pin in the middle of the propshaft with a tightening torque of 110 Nm.
Screw on the heat shield of the catalytic converter.
Install the exhaust system.
Install the protective tray of the unit.
Lower the car.