So I've recently ran into a problem with my 03 GT. I just had the heads redone and its all back together and running, however, for some strange reason it suddenly wont shift into fourth and fifth gears. To be more specific, the shift **** will go into the fourth gear spot but unless you are pedaling it, it will not catch. when in fifth it just boggs down. reverse and first through third gear work perfectly. In addition the clutch is less than a year old, its a McLeod stage 2 clutch. Any one have an idea of what this problem could be?