i took it to the dealership once already, but they just told me that they were unable to replicate the issue and asked if i would take their tech for a ride along. He had already gone home though, so i need to make an apt. to go back. problem is that he has the same work hours that i do
However, since then i have installed the perrin rear-shift bushing and the whiteline positive shift kit. The problem has certainly improved. It doesn't happen EVERY time now, just occasionally. But when it does happen, it is a pretty severe crunch and has even refused to go into 5th. Luckily i keep the clutch in and re-tried from 4th-->5th. hopefully some better transmission oil will help some more.
on a side note: The only negatives i have with the shifter bushing/positive shift kit are that my trans in now pretty noisy when creeping along, such as in a parking lot. Also have a bit of a gear whine noise accelerating through lower RPMs. As to be expected though. And Unfortunately, i put them both in at the same time, so i couldn't tell you how they affect the car separately.