Hey H-T. I recently got my tranny rebuilt about 80 miles ago with a new differential bearing, carbon coated synchros for 3-4 gear and honda synchros for the rest of the gears. I kept my same clutch, flywheel, and TOB. For the first 40 miles everything was perfect and shifted great under normal driving conditions and even when taking it to redline.

Now everytime I redline it say from 1st to 2nd it feels like the gate gets blocked off and wont go in until the rpms drop, but there is no grind. If I Redline 2nd going into 3rd it is fine, although I did feel it get a little tough to get into once but that could have just been me. And finally redlining 3rd to 4th it feels like it gets blocked again. The clutch does not slip at all and holds the power great. Im thinking it may be the throw out bearing, but not totally sure. Anyone have any ideas on what may be the problem??