89 80 trans drive flange replacemnt

[George Selby]

I'm replacing the transmission on my 80 due to diff or pinion bearing 
failure in the old one.  The replacement trans I got has different size 
drive flanges on it (larger,) so I need to swap them out.  It's a 012 2WD 
trans.  I can't get them out.  I looked for a bolt in the center but there 
isn't one.  I tried popping them out like a CV joint in a car with slip in 
drive shafts (with a two foot screwdriver,) but they aren't budging.  I 
unbolted the housing on the bad trans, but drive flange holds it in, which 
leads me to believe it is a pop in unit, I just need a slide hammer to pull 
it out.  Am I barking up the right tree or is there a special technique to 
get the sucker out?

Next question:  does anyone have a vacuum diagram for a 89 Audi 80 4 
cyl?  I discovered a few loose hoses and a few bad ones while removing the 
transmission (which is probably the reason for my hard starting problem, 
one large hose leading right to the intake had large holes in it.)

George Selby