GunnyJ

What up folks, hope someone can help with this. My 02 trans am shifts fine when the car is off however, when I start her up the shifting gets very notchy as if it does not want to go into gear. From 1st to reverse. There are times when I have to sit and wait a minute before I can drive off. Reverse is the woest, when I get in my car to back out, its like I have to move around the other gears first. I installed a centerforce dual fric clutch, new slave, tick MC and speedbleeder, and a MGW shifter about 1500 miles ago. any ideas? Could it be the tranny? Thanks in advance for any help.