2018 Buick Enclave transmission problems: rough shift/slipping out of gear

Rough Shift/Slipping Out Of Gear

2018 Buick Enclave

This problem may be covered under warranty. Ask your Buick dealer.


fairly significant
Typical Repair Cost:
No data
Average Mileage:
7,700 miles
Total Complaints:
3 complaints

Most Common Solutions:

  1. not sure (2 reports)
  2. replace valve and solenoid bodies (1 reports)
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2018 Buick Enclave transmission problems

transmission problem

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2018 Buick Enclave Owner Comments

problem #3

Jan 012019

Enclave 1SL 3.6L,V6

  • Automatic transmission
  • 4,000 miles


Less than 4000 on our new 2018 Buick Enclave when the 9 speed transmission started ‘stuttering’ in what I believe is 2 & 3rd gear. Down in Orange Beach Al for the winter and had to go an hour away for service.

Dealership first trip: Had just received a bulletin (we never received any notification of possible problems). Changed the transmission fluid. Was told to drive it 200 miles and problem should be resolved. Dealership in Pensacola was fantastic. Problem continued.

Dealership second trip: Latest bulletin. Crank shaft motion sensor was replaced. Was given a 2019 loaner car minus all the bells and whistles of ours—no ‘stuttering’ with that one. Problem continues:

Dealership third trip: Full diagnostic performed. Reset the shift pattern: Problem continues:

Contacted the selling dealership in Green Bay, WI and will be visiting them upon our return.

- Tom S., Porterfield, US

problem #2

Oct 292018

Enclave Essence AWD 3.6L V6

  • Automatic transmission
  • 15,000 miles

It was a somewhat frustrating experience as the dealership first did nothing about the issue since no codes showed up relating to the transmission. I had to make a second trip separate of any other maintenance being done. They did acknowledge the problem at that point and also gave me a loaner vehicle while the repairs were being done. The vehicle is shifting fine now. But kind of concerned with the fact there was debris in the transmission so early in the vehicle's life.

- Mike Y., New Carlisle, US

problem #1

Jun 012018

Enclave Premium 3.6L V6

  • Automatic transmission
  • 4,100 miles

Accelerating from a stop it feels like it slips out of and back into gear. This is a 9 speed transmission so you're usually in 6th at 40mph. This happens in 2nd, 3rd, 4th, and 5th gears. It is a obvious jerking with associated increase of RPM, roughly 100-400 depending on the gear and time out of gear. Sometimes it's four or five times per gear change and others it's only once or twice. Like it rapidly goes in and out of gear.

Took it to the Buick dealership service center. They found a service bulletin instructing them to flush the transmission. They did this and told me that it should stop after 200-300 miles driven. It has not stopped. Their only transmission guys was injured and is out for several weeks. Another GM dealership could not identify the problem. My guess is that this Chevy mechanic is not familiar with Buicks and/or didn't care to spend time on it. He only drove it for a couple miles in slow traffic and claimed he didn't feel anything wrong. They were a VERY busy Chevy service center.

I plan to take it back to the original Buick dealership once their transmission guy is back. I'm curious whether any other 2018 Enclave owners are experiencing the same problem.

- Eric L., Charleston, SC, US

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