This is how to change the drive axle flanges on a baywindow VW bus with 002 or 091 transaxle.
 
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Drain the gear oil
Check the oil pan for anything suspicious
Remove the drive flange centre caps
They have a hole in the middle
Just pry them off
Remove the flange retaining ring
You need a puller to get the flange off
It’s off
Side cover screws might be rusty and stuck
Remove screws
Put the flange back in so dirt will not get inside
Pry cover and it comes out
Below cover is another seal
This is the important seal to replace
You need a seal puller to get it out
Work the tool around gently
Then it will come out
There it is
Below flange is a spring ring
Clean up the inside
Spring ring back in
This is a home-made seal tool
A few bits of scrap steel and a long bolt
This will drive the new seal into the transaxle
New seal is deeper than the old one
Drive the seal in with the tool
Seal is in
Rubber ring seal
New style side cover
Screws for the cover and special washers
Special washers
Flange retaining ring
Place ring in position
It will not seat all the way
Use a puller to compress the spring ring
Once it is compressed...
You can click it all the way into the groove
Ring is in
New flange plug
Use a mandrel to drive the plug home
All done!