Separating the propeller shaft from the gearbox (BMW 5 Series E34)

Sliding element design

Using the BMW 261040 tool, loosen the threaded ring "arrow" a few turns. If you do not have this tool, loosen the threaded ring with a pipe wrench.



Unscrew the cardan shaft from the gearbox.



Vehicles with vibration damper: Remove the vibration damper from the gearbox. Turn the vibration damper 60° and attach it to the rubber coupling. The vibration damper is removed together with the propeller shaft.

Front crossbar design

Support the gearbox on a jack with a wooden block.



Remove the cross beam and gearbox mount.

Loosen the crosspiece nuts.



Remove the cardan shaft from the rear axle gearbox. Block the shaft with a crowbar.

Caution: On constant velocity joint designs, place the cap on the joint to protect it from dirt. Check for grease filling.

Remove the middle 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.

Caution: Do not disconnect the cardan shaft at the sliding element.

Caution: Do not drop the cardan shaft. The rubber seal of the constant velocity joint may be damaged in particular.

Installation

If there are vibrations and noises, the cardan hall should be balanced in a workshop. In addition, the bending angle of the cardan shaft can be checked.

Note: The cardan shaft is balanced as a set and can only be replaced as an assembly. Replace worn cardan shafts.

Before installation, check the centering disk of the cardan shaft, if necessary, lubricate the disk with Moiykore Longtherm 2. Replace the damaged disk.

With the help of an assistant, push the cardan shaft into the centering pin of the gearbox.



Tighten the middle support with a tightening torque of 22 Nm. At the same time, shift the middle support with an interference fit of E = 4-6 mm in the direction of travel. Cardan shaft without sliding element: E = 2-4 mm.

Screw the cardan shaft to the rear axle gearbox. To avoid overtightening the cardan shaft, if possible, only the nuts or bolts on the flange side should be turned. Install new self-locking nuts with a tightening torque of 70 Nm.



Constant velocity joint design: Check seal, replace if necessary. Bolt propeller shaft to rear axle gearbox.

Tightening torques:

• m8 bolts - 32 Nm
• m10 bolts - 70 Nm

Vehicles with front crosspiece: Tighten new lock nuts to a tightening torque of 70 Nm.

Screw on the gearbox mount and cross beam, remove the jack.

On vehicles with vibration damper: Insert the vibration damper with a 60° rotation.

Screw the cardan shaft to the gearbox with new self-locking nuts.

Tightening torques:

• bolts M8-8.8 - 45 nm
• bolts M10-10.9 - 70 nm
• m12 bolts - 80 Nm

To avoid overtightening the cardan shaft, if possible only the nuts or bolts on the flange side should be turned. Block the cardan shaft from turning with a crowbar.

On vehicles with automatic transmission: Bolt the transmission mount.

Tighten the threaded ring to a torque of 17 Nm. If there is no special tool, tighten with a pipe wrench.

On vehicles without a sliding element: Tighten the fork to the support pin in the middle of the propeller shaft with a tightening torque of 110 Nm.

Screw on the catalytic converter heat shield.

Install the exhaust system.

Install the protective tray of the unit.

Lower the car.

[You can read the original on the website «BMWMAN.ru»]