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2019 Enclave Avenir - Hard Shifting and Delayed Engagement

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Mike T. · rep 0 · May 25, 2:44 AM · 1 replies · solved · Question

Vehicle: 2019 Buick Enclave Avenir

Hey everyone, I'm having some pretty frustrating issues with my 2019 Buick Enclave Avenir. Lately, the transmission has been acting up, especially when shifting from 1st to 2nd gear, and sometimes even into 3rd. It feels like a hard jolt, and there's a noticeable delay before it finally engages.

It's got around 65,000 miles on it, and I've kept up with all the regular maintenance. I'm worried this might be a bigger problem than just a fluid change. Has anyone else experienced similar hard shifting or delayed engagement issues with their Enclave, especially in this model year range? What was the fix?

I'm hoping to get some insights before I take it into the dealership. Any advice or shared experiences would be greatly appreciated!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 2:44 AM

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ClearTheCode admin answer:

Hard shifting and delayed engagement in your 2019 Buick Enclave Avenir can be indicative of several issues within the transmission system. Given the symptoms, it's important to address this promptly to prevent further damage.

Common Causes:

  1. Low or Contaminated Transmission Fluid: While you mentioned regular maintenance, transmission fluid can still degrade or become low over time. Incorrect fluid type can also cause issues.
  2. Transmission Solenoid Malfunction: Solenoids control the flow of transmission fluid, directing shifts. A faulty solenoid can cause erratic or delayed shifting.
  3. Valve Body Issues: The valve body is the 'brain' of the automatic transmission, directing hydraulic fluid to the clutch packs and bands. Wear or blockages can lead to shifting problems.
  4. Internal Transmission Wear: Components like clutch packs or bands can wear out, leading to slipping or hard shifts.
  5. Software Glitch: Sometimes, a simple software update for the Transmission Control Module (TCM) can resolve shifting anomalies.

Diagnostics & What to Do:

  1. Check Transmission Fluid Level and Condition: This is the first and easiest step. Ensure the fluid is at the correct level and doesn't appear dark, burnt, or have a strong odor. Refer to your owner's manual for the proper checking procedure (often done while warm and running).
  2. Scan for Diagnostic Trouble Codes (DTCs): Even without a check engine light, a transmission specific code might be present. Common codes related to transmission issues include: P0700 (Transmission Control System Malfunction), P0717 (Input/Turbine Speed Sensor Circuit No Signal), P0741 (Torque Converter Clutch Circuit Performance or Stuck Off).
  3. Professional Inspection: Due to the complexity of automatic transmissions, it's highly recommended to have a qualified mechanic or dealership perform a thorough diagnostic. They can check fluid pressure, perform advanced scans, and physically inspect components if necessary.

When to See a Shop:

You should schedule an appointment with a trusted automotive shop or Buick dealership as soon as possible. Continuing to drive with these symptoms can exacerbate the problem, potentially leading to more extensive and costly repairs. Do not delay, especially if the symptoms worsen or if you notice any new noises or smells.

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