1991 Olds 88 - Trans problem

I would like to thank everone that shares information.

My Olds shifts in and out of gear while stopped at traffic lights.
It also takes time to drop into gear when cold.
It sometime shifts in and out of gear while driving.

Has anyone run in to this?

Thanks in advance for all people that take the timme to answer this.

Check to see that your fluid is up. I know it sounds obvious but many time just a little low will cause this. If it doesn't cure the problem, look to change the filter.