Another transmission bites the dust

[My68myway]

I know absolutly nothing about transmissions, but im going to try and see what yall might think is wrong, I had this transmission (turbo 350) rebuilt a year ago and they put in a manual valve body along with the rebuild, all was going good, i had the transmission in the car for about a year and only put around 1000 miles on it well about 2 hours ago i was driving around and shifted into 3rd at around 1500 rpm's and it wasnt there went back to second it was gone to, first as well. it made no noises when it went, the fluid is full and still looks brand new. reverse still works fine i just lost all my forward gears so im lost. I'm going to call the shop that rebuilt it in the morning and see what they say but i was just wondering what yall had to say about it. thanks for any feedback