4WD Crew Cab 8 speed transmission. 8500 miles. Transmission always feels like it’s trying to find what gear it should be in when cruising around 35 - 40 mph. Yesterday it started shuddering and felt like it was slipping constantly no matter what the speed. Researched on web and see a multitude of complaints as well as class action lawsuits being filed against GMC. I also saw where it was recommended from GMC to either replace fluid with lubegard or drain some fluid and use the lubegard as an additive. I’m looking for input from anyone who Is/has experienced this issue and how you had it resolved. Thank you.
