Not sure if anyone is even reading this anymore, but here goes. I thought I'd lost 4th gear (of all gears). The synchro seemed shot, and I had to rev match to get it in to 4th (up and down). Then I burned up my ACT Street clutch. So, I put in an ACT 6 puck, sprung-hub, and thought I'd drive it till the tranny gave up for good. After the clutch install, 4th gear seems to have fixed itself. I know that can't be true, and that perhaps the first ACT was not totally disengaging or something. But 4th was still a problem as that clutch wore to nothing. Anyway, I expect the problem will reappear, but it's been almost 8,000 miles on the new clutch, and I have zero problems. I did change the tranny fluid when I put in the clutch, but the car only had 28K on it, so I doubt the fluid was so messed up that it effected the synchros. But maybe?