GM has known about the issues with their transmission in the 2014 -2017 Buick Enclave models. They were found under NHTSA Technical Service Bulletin: 18-NA-358 dated October 2020. I have reported this problem to GM, with the information that they requested. The issue here is that the manufacturer currently has a class-action lawsuit filed against it and will have another if they refuse to acknowledge the failures of their transmission in this vehicle. The following expert from the TSB states the following: Some customers may comment that the vehicle may have a severe launch shudder in 1st gear from a stop, or while driving along when in 4th gear, or during the 2-3 upshift or 3-2 downshift. Some customers may also comment on one or more of the following conditions: ⢠Flare ⢠Slide/bump ⢠Slip ⢠Harshshift The problem here is that with the advanced knowledge they had, they knowingly and willingly refused to issue a recall on these vehicles, which has severe outcomes for owners. My wife, who was driving the Enclave was nearly rear-ended at highway speeds when the vehicles behind her were in proximity to her slowed vehicle. The vehicle began to shudder and again when she began driving when the traffic moved. The transmission slips from gears and I verified this myself taking a test drive if the vehicle. This could have led to serious injury or death to my wife! GM refuses to provide any relief from this issue, nor do they wish to accept any amount of responsibility. My qu