Disconnect the cardan shaft from the gearbox (see Replacing the cardan transmission) and move it back.
For ease of use...
...using a 13 mm socket, unscrew the two nuts securing the cross member to the body and lower the rear part of the box until it stops.
Using two 19 mm wrenches, unscrew the three nuts securing the elastic coupling to the flange.
To make it easier to remove and install the coupling, you can put a special clamp on it or wrap it with tape (see Features of repair of a five-speed gearbox).
Prying it off with a screwdriver,...
...we remove the elastic coupling.
Remove the centering ring seal.
Using a puller, remove the retaining ring from the secondary shaft.
Using the bolt in the flange of the elastic coupling as a lock, use a 30 mm wrench to loosen the nut that secures it a few turns to move the centering ring.
View the original on the internet resource (VazBook.ru)
Using two screwdrivers, remove the centering ring of the elastic coupling.
After unscrewing the nut and removing the spring washer,...
...we use a puller to pull off the elastic coupling flange...
...and we take it off.
Using a screwdriver, we remove the secondary shaft seal.
Before installation, lubricate the cuff with a thin layer of any lubricant.
We press the new cuff through a pipe of a suitable diameter or an old cuff.
We install the removed parts in the reverse order.