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2018 Silverado 1500 Rough Shifting & Transmission Fluid Question

0

Kevin B. · rep 0 · May 22, 2:38 AM · 1 replies · solved · Question

Hey everyone, I've got a 2018 Chevrolet Silverado 1500, 5.3L V8, with about 85,000 miles on it. Lately, I've noticed some really rough shifts, especially between 2nd and 3rd gear, and sometimes a slight delay engaging reverse. It's an 8-speed automatic.

I'm wondering if it's time for a transmission fluid change or flush. I haven't had it done yet, and the owner's manual suggests inspecting it at 45,000 miles and changing it under severe conditions. I do a fair bit of towing.

Has anyone experienced this with their Silverado? What's the recommended procedure? Should I just drain and fill, or go for a full flush? Also, no check engine light yet, but I'm worried it might pop up soon.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 2:38 AM

0

ClearTheCode guidance (Chevrolet · Maintenance & DIY)

Summary: For 2018 Silverado 1500 Rough Shifting & Transmission Fluid Question, 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: Hey everyone, I've got a 2018 Chevrolet Silverado 1500, 5.3L V8, with about 85,000 miles on it. Lately, I've noticed some really rough shifts, especially between 2nd and 3rd gear, and sometimes a slight delay engaging reverse. It's an 8-speed automatic.

I'm wondering if it's time for a transmission fluid change or flush. I haven't had it done yet, and the owner's manual suggests inspecting it at …

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

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