Well I've been trying to find out why my car has been shifting hard for a while now. I was about to order a new clutch even though it wasn't slipping. After hours of research looking for the right fluid I decided to put in Amsoil synthetic ATF to see if it helped, it didn't. I ordered a quadrant and fire wall adjuster and played with the adjustment for hours, didn't help either. I found a few threads on here by a user named "Helomech74" saying to add a 4oz bottle of Ford friction modifier, the stuff you'd put in a rear end. And damn it worked perfect! The syncros don't work correctly with fluid that's too slick or slippery. They need to be able to slow down and match speeds before the shift will complete. The friction modifier does just that and it worked wonders for me! Now it's time to go back to the track so I can see what I can actually run with a good shifting transmission.