Viscous coupling case replacement
 

Hi, I need to replace a viscous coupling case on a 993 TT transmission, I already worked on 996 and 997 transmission but never in a 993 AWD system.
A friend of mine told me that remove the bearings from the borken case to install them in the new one can be a difficult job.
I got the workshop manual but it didn't talk about any special bearing or special tool to remove them.
Someone did this kind of job? this could be difficult? I got the tool 9253 to block the drive shaft, but I never heard something about any specia procedure with the viscous coupling bearings.
Any help is more than welcome!

Regards
Hernan