I have a problem with my tranny , it's not shifting right

. It's a new tranny from TCI that I bought a little over a year ago and has less than 1 mile on it .
Here's the problem , the tranny is a 3 speed. It has park , reverse , neutral , and 2nd . It seems that 1st is not there and when it goes to shift from 2nd to drive there's nothing , it's like drive doesn't exist.
I've tried adjusting the shifting linkage , but still nothing , and the fluid level is full. The shifter goes through all the gears but no drive when it's running.
Anybody have a clue whats the problem ?
Rocky
You're welcome Mike, glad it worked out for you. Roger, it's taken a few years but my inventory of excess parts has shrunk a fair bit from 1 1/2 garage stalls to about an eight by eight space. ...
1968 Plymouth Valiant 1st Gen HEMI