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2024 Envista Transmission Hesitation/Delayed Engagement

0

Chris P. · rep 0 · May 22, 3:49 AM · 1 replies · solved · Question

Vehicle: 2024 Buick Envista Sport

Just got my new 2024 Buick Envista Sport a few months ago, and I'm already noticing some weird transmission behavior. Sometimes when I shift into Drive or Reverse from Park, there's a noticeable delay before it actually engages. It's not immediate like I'd expect from a new car.

Also, during low-speed driving, especially in stop-and-go traffic, it occasionally feels like it's hesitating to shift gears or shifts a bit harshly. It's not a violent jolt, but definitely not smooth. No warning lights are on yet, which is confusing.

Given it's a brand new car, I'm a bit worried about this. Is this normal break-in behavior for a new transmission, or could it be a sign of a problem that needs addressing? What should I look for or mention specifically when I take it to the dealer?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 3:49 AM

0

It's understandable to be concerned about transmission behavior in a brand new vehicle like your 2024 Buick Envista Sport. While some minor variations in shifting can occur during a break-in period as the transmission's adaptive learning adjusts to your driving style, noticeable delays and harsh shifts are not typically considered normal.

Here's what could be causing these symptoms and what to do:

  1. Transmission Control Module (TCM) Software: Modern transmissions are heavily controlled by software. There might be a known software update or a relearn procedure that needs to be performed by the dealership to optimize shifting performance.
  2. Low or Contaminated Transmission Fluid: Although less common in new, sealed transmissions, an incorrect fluid level or contamination could cause issues. This would require a dealership to check, as most new transmissions don't have a user-serviceable dipstick.
  3. Solenoid Issues: Internal transmission solenoids control fluid flow for gear changes. A faulty or sticky solenoid could cause delays or harsh shifts.
  4. Valve Body Issues: The valve body directs transmission fluid to engage clutches and bands. Issues here can lead to various shifting problems.
  5. Internal Mechanical Issues: While rare in a new vehicle, internal clutch pack wear or other mechanical failures could be present from manufacturing.

When to See a Shop (Dealership):

  • Immediately. Since your vehicle is brand new and under warranty, any transmission concerns should be addressed by a certified Buick dealership. Do not attempt to diagnose or repair this yourself.
  • Document Everything: Note down specific instances of delayed engagement or harsh shifts, including speed, gear, engine RPM, and whether the engine was cold or warm. This detailed information will help the technician diagnose the problem.
  • Mention 'Normal Operation': Clearly state that the behavior is not what you'd expect from a new vehicle and that it feels abnormal compared to other vehicles you've driven. Ask them to check for any technical service bulletins (TSBs) related to transmission shifting for your specific model year.
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