I watched a few youtubes and found some forums on the trans kit and everything suggested do what you can with trans in the car. But the kit came with a few other parts that I was curious about. Here it is...https://www.amazon.com/Wellington-Pa.../dp/B008XO9ATC

I will definitely replace the cover seals. The rear main is to big for my seal driver set. The gm service manual shows a tool that draws the seal in with a bolt. I was hoping somebody could elaborate on whether a driver of the correct size would work instead of the special gm tool. Worst case I could take the cover off and take it to the dealer and have them put it in. In the mean time I might bite the bullet and buy the tool or a driver set that fits. Rear main seal bore is about 3 7/8" od and roughly a 3" id seal.