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Harsh Shifts in my 2016 Challenger SXT - Transmission Problem?

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David L. · rep 0 · May 25, 4:19 AM · 1 replies · solved · Question

Vehicle: 2016 Dodge Challenger SXT

My 2016 Dodge Challenger SXT, which has the 3.6L V6 and the 8-speed automatic transmission, has recently started having some really harsh shifts. It's most noticeable when shifting from 1st to 2nd gear, and sometimes from 2nd to 3rd. There's often a noticeable delay before it clunks into the next gear.

I'm really worried about the transmission, as the car only has about 70,000 miles on it. I've heard these ZF 8HP transmissions are usually pretty smooth. Has anyone else experienced this kind of harsh shifting with their Challenger, especially a 2016 model?

What could be causing this? Is it a common issue, and what kind of repair am I looking at? I want to be prepared before I take it to a mechanic.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 4:19 AM

0

ClearTheCode admin answer:

Harsh or delayed shifting in the ZF 8-speed automatic transmission (8HP45) found in your 2016 Dodge Challenger SXT can be concerning, but it's often a fixable issue. Here are the common causes and steps:

  1. Adaptive Learning: These modern transmissions adapt to your driving style. Sometimes, a reset of the adaptive learning values can resolve erratic shifting. This is typically done with a diagnostic scan tool at a dealership or specialized transmission shop.
  2. Software Updates: Outdated transmission control module (TCM) software is a frequent culprit. Manufacturers release updates to refine shift logic and address known issues. A dealer can check for and apply the latest firmware.
  3. Low or Contaminated Fluid: While the ZF 8HP is considered 'sealed for life' by some, fluid degradation or low levels can cause shifting problems. A transmission fluid and filter service (using the correct ZF-approved fluid) can sometimes improve shift quality. This is typically recommended around 60,000-100,000 miles, depending on driving conditions.
  4. Valve Body Issues: The valve body controls hydraulic pressure for gear engagement. Internal solenoids or passages can wear or become clogged, leading to harsh shifts. This is a more complex repair.
  5. OBD-II Codes: A transmission issue will often trigger a Check Engine Light and store specific codes. Look for generic transmission fault codes like P0700 (Transmission Control System Malfunction) or more specific codes related to gear ratio errors (e.g., P0731 for 1st gear, P0732 for 2nd gear).

When to see a shop: If the harsh shifting is persistent, accompanied by a Check Engine Light, or you notice any slipping, it's crucial to have a qualified technician diagnose the issue promptly. Ignoring transmission problems can lead to more extensive and costly repairs.

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