Timing Pin Replacement

[TooManyAudis at aol.com]

I have good reason to believe that the flywheel timing pin on my 91 200q is  
no longer with us.  Can it be replaced with the tranny still on the car, or  
is this a pull tranny, replace timing pin, replace tranny kind of deal?
 
Thanks,
 
 
Tom
91 200q
88 80q