[Oldskool153]

ok so I jus got a gorgeous 94 z28 off an older woman, its completly stock and i love it..my question is im not real fimiliar with automatic transmissions, it shifts nice and crisp but i've noticed that it doesnt shift into high gear/OD until around 50mph and when comming to a stop i can feel when it down shifts from 2cd to 1st, is this normal or culd it be the way it was rebuilt, or am i paranoid?? lol