My dryer doesn't seem to be spinning fast enough. Everything just seems to wind up in a big ball. Any suggestions on what I need to fix or replace. I have replaced the pulley and the rollers already.

Dryers aren't supposed to run fast. They keep the clothes separated by gravity. The clothes are carried up to the top by the side fins and then are supposed to drop to the bottom. If you have a lot of heavy jeans, towels and long items, they tend to stay together as the clothes intertwine. It also takes longer to dry if they aren't separated.

I have to open and separate the laundry all the time, it seems to do it no matter what I have loaded. My dryer also squeaks for the first few seconds every time I start it. Any suggestions?

Sounds like your dirve belt needs to be replaced.

Squeeking is usually a drive belt. They fit all different ways so Google your make and model and it will show you the schematic. Dryers are fairly easy to fix, compared to a washer. There is a motor, drum, drum rollers and a drive belt and tensioned. Of course there are other safety related items but that doesn't appear to be an issue.

You never mentioned a brand name or model number, but I'm guessing you have a maytag product and you put the belt on wrong, causing it to spin to fast. As ma0641 said above, Google the model number and check your belt routing.