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2017 Malibu Premier Transmission Shifting Hard, Service Transmission Light

0

Mike T. · rep 0 · May 25, 1:38 AM · 1 replies · solved · Question

Vehicle: 2017 Chevrolet Malibu Premier

Hi all,

I'm having some serious issues with my 2017 Chevrolet Malibu Premier, 2.0T with the 9-speed automatic transmission. Lately, it's been shifting really hard, especially from 1st to 2nd and sometimes 2nd to 3rd. It feels like a jolt.

Yesterday, the 'Service Transmission' light came on, and the car felt like it was struggling to find the right gear. I haven't noticed any leaks, but the problem seems to be getting worse. I don't have an advanced scanner, so I can't pull specific transmission codes.

Is this a common problem with these Malibu transmissions? What could be causing this, and what should I do before heading to a dealership? I'm worried about a costly repair.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 1:38 AM

0

ClearTheCode admin answer:

Hard shifting and a 'Service Transmission' light on your 2017 Chevrolet Malibu Premier with the 9-speed automatic transmission are concerning symptoms that warrant immediate attention. While these transmissions are generally robust, issues can arise. Without specific diagnostic trouble codes (DTCs), it's harder to pinpoint the exact cause, but here are common possibilities:

Common Causes:

  1. Low or Contaminated Transmission Fluid: Low fluid levels can cause erratic shifting and overheating. Contaminated fluid (dark, burnt smell) indicates internal wear.
  2. Faulty Transmission Solenoids: Solenoids control the flow of transmission fluid to engage gears. If one or more are sticking or failing, it can lead to harsh shifts or gear engagement issues.
  3. Valve Body Issues: The valve body directs fluid pressure to the clutches and bands. Wear or blockages can cause shifting problems.
  4. Transmission Control Module (TCM) Issues: The TCM manages transmission operation. A faulty TCM or wiring issues can lead to incorrect shift commands.
  5. Internal Transmission Wear: Worn clutch packs, bands, or other internal components can cause hard shifting, especially as mileage increases.
  6. Software Glitch/Update Needed: Sometimes, harsh shifting can be resolved with a software update for the TCM.

Diagnostic Steps (Limited without advanced scanner):

  1. Check Transmission Fluid Level and Condition: This is crucial. Consult your owner's manual for the correct procedure, as some transmissions have sealed systems or specific checking methods. Note the color and smell of the fluid.
  2. Listen for Unusual Noises: Pay attention to any whining, grinding, or clunking noises coming from the transmission area.
  3. Note Specific Shift Points: Try to identify which specific gear changes are the harshest (e.g., 1-2, 2-3, 3-4, etc.). This information can be helpful for a technician.

When to See a Shop:

  • Immediately: A 'Service Transmission' light, especially with harsh shifting, indicates a potentially serious problem. Continued driving could cause further, more expensive damage.
  • For Code Retrieval: A professional shop or dealership will have an advanced scanner capable of reading transmission-specific DTCs (P-codes and manufacturer-specific codes), which are essential for accurate diagnosis.
  • For Fluid Service: If the fluid is low or contaminated, a professional fluid exchange (not just a drain and fill) might be recommended, but only after a full diagnosis.
  • For Internal Inspection: If the issue points to solenoids, valve body, or internal wear, professional repair or replacement will be necessary. Given the complexity of modern transmissions, DIY repair is generally not recommended.
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