Thank you for information. I'm betting on the drum but I'll have to call the place that rebuilt the transmission and see if it's under warranty (probably not) but I'll see what they can do first before pulling it. A lot is hinting to the drum itself as a lot of people with ls4 and the 4t65e experience this problem after a rebuild and from what I found online it is the weakest part of the transmission. But sadly like almost every car problem it happens right before it gets cold outside, live in Ohio.
As from what I read on this site matches my exact problem with a rebuild with around 25,000 miles on it.
Sunday, January 6th, 2019 AT 6:56 PM