I'm looking for some advice on what to do in my current situation. I have bled the clutch already, the tranny fluid is good, and the tranny was just rebuilt and is brand new.

Initially, shifting to every gear is done quite easily (except for 5th and reverse). When I put the car into 1st gear, and slowly release the clutch pedal, the pedal will stick down a little, then after a small delay, it will force its way into my foot. Same thing happens in 2nd. In 3rd and 4th gear, that no longer occurs. Instead, when i apply the throttle, the shifter pushes back on my hand (like it wants to go back into neutral). Sometimes, if I don't keep my hand on it, it will pop back to neutral.
5th and reverse are difficult to get into (unless you double clutch, or something like that).

Any help would be appreciated.

 

what kind of setup is this? It almost sounds to me like your shift linkage isn't the correct length. I had this problem once when I did a b16 crx, after lengthening the linkage about a half inch it was fine.

 

It's an H23 transmission with custom gearing. I am using the stock shifter linkages. In neutral with the car off, I can get the car into all gears quite easily.