blubirdtp

since the other day ive been noticing this. at low rpms when im just cruising around and not beating on the car hard when i shift into 3rd and 4th at low rpm its gettin tough to get into gear. its the complete opposite if im racing though it goes into every gear smooth as can be. i had the whole clutch set up replaced about 2500 miles ago and its never given me any problem at all until this. its not horrible but its noticable to me. any ideas?