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2018 Silverado 8-speed transmission shifting rough

0

Kim L. · rep 0 · May 25, 1:44 AM · 1 replies · solved · Question

My 2018 Chevrolet Silverado 1500 LT with the 5.3L V8 and 8-speed automatic transmission has been acting up lately. When accelerating from a stop or shifting into higher gears, it often feels like it's clunking or jerking pretty hard. It's not smooth at all, and sometimes it feels like it slips a bit before engaging.

I've heard about issues with these transmissions, but I'm not sure if it's something I need to worry about immediately or if there's a known fix. The truck has about 70,000 miles on it. Any advice on what I should check or ask for at the dealership?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 1:44 AM

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ClearTheCode guidance (Chevrolet · Buying & ownership)

Summary: For 2018 Silverado 8-speed transmission shifting rough, work through these steps on your 2015+ 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 Chevrolet Silverado 1500 LT with the 5.3L V8 and 8-speed automatic transmission has been acting up lately. When accelerating from a stop or shifting into higher gears, it often feels like it's clunking or jerking pretty hard. It's not smooth at all, and sometimes it feels like it slips a bit before engaging.

I've heard about issues with these transmissions, but I'm not sure if it's someth…

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

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