The motor mounts are broken or worn out or you have a broken wavy plate in the transmission.
Check the transmission fluid. You should check it while the car is warm.
you need to change the fluid. my 99 grand am does that, it feels like you're shifting a manual from 1st to 2nd.
First off, where did you get the 99 grand am strut bar?
I believe +99 Grand Cherokees moved to a distributorless system, you will only have coilpacks. They are normally 1 coil park for 2 cylinders.
A madd gear pro will cost about $99 from Kmart
Defense : 99 - Attack : 100
Some 99 Grand Prix vehicles will shift hard when it is warm. Not all of these vehicles will do this.
I know that you've probably tried this, but it seems worth mentioning: is your foot on the brake? With my '99 Taurus, I must have my foot on the break to shift out.
99
you can get one on eBay but cheapest is at toys r us $ 99 and kmart $ 99
The low pressure port on the 99 Grand am is on the passenger side. It is right against the firewall.
what trans u got