Hello. I just had my transmission rebuilt (locally) and put about 100 miles on the transmission. I had first gear for a while, but now the transmission will kick me out of first, or I can't get in at all, or it feels like I'm in gear but instead it just grinds. Third gear was iffy from the start - again not letting me in - or it would feel like it was in gear but instead it would just grind. Now it is completely inoperable. Reverse is similar - it is hard to get into - it will feel like I'm in gear but just grind. When it works - there is a strong "click" as the clutch is let out.
I have a short shifter with shift stops- but I loosened those up so the top stop completely. The transmission was rebuilt with a steel shift fork, new synchros, new gears, new bearings, new mainshaft, etc.
I jacked up the rear of the car to verify that the clutch was fully engaging - and it was. The clutch is 150 miles old and in good shape. The clutch pedal feels fine and I re-bled the system.
No particular event brought this on - when I was driving I did some quick 1-2 shifts (with the clutch), but that is it. The first and reverse problem developed after about 80 miles of driving - and third gear became completely inoperable at this time as well.
The rebuilder drove it and is stumped - any ideas????