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2018 Mazda 3 Automatic Transmission Hesitation/Rough Shifts

0

Mike T. · rep 0 · May 22, 4:53 AM · 1 replies · solved · Question

Vehicle: 2018 Mazda 3 Touring

Hi all,

I own a 2018 Mazda 3 Touring with the automatic transmission, and I've noticed some concerning behavior lately. The transmission seems to hesitate when accelerating from a stop, and shifts, especially between 2nd and 3rd gear, feel a bit rough or clunky. It's not always consistent, but it's definitely noticeable and makes the driving experience less smooth.

I'm worried this could be a sign of a bigger problem. Has anyone else experienced this with their 2018 Mazda 3? Is this something that can be fixed with a software update, or am I looking at a more serious transmission issue? Any insights would be helpful before I take it to the dealer.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 4:53 AM

0

ClearTheCode admin answer:

Rough shifting or hesitation in automatic transmissions, like those found in the 2018 Mazda 3, can stem from several sources, ranging from minor software glitches to more significant mechanical issues. It's important to address this promptly.

Potential Causes:

  1. Transmission Control Module (TCM) Software: The most common cause for these symptoms in modern vehicles is outdated or corrupted software within the TCM. Updates can often smooth out shift points and improve responsiveness.
  2. Low or Contaminated Transmission Fluid: While less common in newer vehicles unless there's a leak, incorrect fluid levels or degraded fluid can impact shifting performance.
  3. Solenoid Issues: The solenoids within the transmission control fluid flow, and if one is sticking or failing, it can cause rough shifts.
  4. Internal Wear: In more severe cases, internal components like clutch packs or valve bodies could be experiencing wear.

When to See a Shop:

  • Immediate Action: Any persistent or worsening transmission issue warrants an immediate visit to a qualified mechanic or Mazda dealership. Ignoring it can lead to more extensive and costly repairs.

What a Shop Will Do:

  1. Diagnostic Scan: They will connect to the OBD-II port to check for any stored diagnostic trouble codes (DTCs) related to the transmission. Common codes might include P0700 (Transmission Control System Malfunction) or specific solenoid codes.
  2. Fluid Check: Inspect transmission fluid level and condition.
  3. Software Update: Check for and apply any available TCM software updates.
  4. Road Test: Perform a road test to observe the shifting behavior under various conditions.
  5. Further Diagnosis: If software and fluid checks don't resolve the issue, they may need to perform more in-depth diagnostics, potentially involving pressure tests or internal inspection.
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