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2018 Enclave Shuddering - Time for Transmission Fluid Change?

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Diana O. · rep 0 · May 22, 3:53 AM · 1 replies · solved · Question

My 2018 Buick Enclave Premium, with about 85,000 miles, has started to develop a slight shudder, especially when accelerating gently between 30-50 mph. It's not constant, but noticeable, almost like driving over rumble strips briefly. I've heard about transmission fluid issues with GM vehicles around this mileage, particularly with the 9-speed automatic.

I'm wondering if it's time for a transmission fluid and filter change. What type of fluid should I use for this model, and is this a DIY job, or should I take it to a specialist? I want to address this before it potentially gets worse.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 3:53 AM

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ClearTheCode guidance (Buick · Maintenance & DIY)

Summary: For 2018 Enclave Shuddering - Time for Transmission Fluid Change?, work through these steps on your 2016+ vehicle:

  1. Confirm the symptom — note when it happens (cold start, highway, after fuel fill, etc.).
  2. Scan codes — save all pending/stored DTCs; don't clear until you've recorded them.
  3. Check TSBs & recalls — look up your VIN for open campaigns and known fixes.
  4. Inspect the obvious — related fuses, connectors, fluid level, and recent repairs.
  5. Test the common fix — follow model-specific service procedures; one change at a time.
  6. Escalate if needed — burning smell, no brakes, overheating, or stalling in traffic → shop visit.

Owner reported: My 2018 Buick Enclave Premium, with about 85,000 miles, has started to develop a slight shudder, especially when accelerating gently between 30-50 mph. It's not constant, but noticeable, almost like driving over rumble strips briefly. I've heard about transmission fluid issues with GM vehicles around this mileage, particularly with the 9-speed automatic.

I'm wondering if it's time for a transmiss…

This is educational guidance, not a substitute for hands-on diagnosis.

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