I was having a rough shift…
I was having a rough shift on my Silverado. I changed my transmission filter and fluid. I also ensured when starting my truck, I allowed the fluid to work thru transmission. Look at your dash gages, the needles will go up, down, and to their normal position. After this shift into drive. I rarely have any shifting issues now. I tow a bass boat, travel trailer, and snowmobile so my truck gets a workout. I hope this helps people.