On my 5.3 8 speed with less than 500 miles, when i put it in reverse, from either park or drive, it slams or jerks into gear. It feels like the same jerk you get when parked on a slight incline or when you shift before the rpms have settled down after start up. But in my case i can be on level ground with the rpms at low idle and i still get it. It doesnt do it when shifting into drive, just reverse. I noticed that when i go to neutral then back to reverse its still does it but not as bad, but straight from park to reverse is when its the worst. I know in general, this isnt normal, but is it normal for these 8 speeds? Btw, it shifts smooth while driving, so no problems there.