i had this simular problem with my 91 na. i put a SR lightweight flywheel in my 91. i was told this this problem was common with the na flywheels from sr. well i was also told that this was not common with the turbo flywheels. well after putting one in my t2 im getting the same problem only the car doesnt shoot forward like it did in my na. I adjusted the clutch and im still getting it.. well i dropped my tranny and found that the guide pin in the shifter housing was pushed out . would this be a reason why it wouldnt shift with the car running? I checked the pressure plate for run marks or binding as well as the flywheel. nothing .. with the na flywheel ithad rasied edges where the clutch release spring sits and thats where it binds up. the turbo flywheel is flat and i cant see how or why it would bind up. my hyrdolics are working . but my question is it strong enough to move the pp ??? can someone help me out here??

 

All the shifter pin does is keep the shifter itself from rotating.

It is quite common for some of the after market hd pp's to overpower a weak hydraulic system.