Hello all, I’ve recently been having some issues with a c4 transmission I bought for a 302/c4 swap in my early foxbody. The motor and transmission is in the car and It seems to go into every gear, and will go into drive but won’t shift automatically or go into 3rd. I have tried pulling the vacuum line from the vac modulator and turning the adjustment screw inside the nipple counter clockwise as a forum I read said to do, but still no luck. I’m thinking it might be a weak vacuum port on my manifold.? Any help or ideas would be awesome, thanks!!