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2020 Charger GT Transmission Shifting Hard and Delayed Engagement

0

Paul Z. · rep 0 · May 22, 5:39 AM · 1 replies · solved · Question

Vehicle: 2020 Dodge Charger GT

Hey everyone, I'm having some weird issues with the transmission in my 2020 Dodge Charger GT. It's got the 3.6L V6 and the 8-speed automatic. Lately, I've noticed it's shifting pretty hard, especially when going from 1st to 2nd gear, and sometimes from 2nd to 3rd.

It's not smooth at all, almost like a jolt. Also, when I put it into Drive or Reverse from Park, there's a noticeable delay before it actually engages, sometimes with a clunk. It wasn't doing this before, and it's got about 45,000 miles on it.

No check engine light yet, but I'm getting worried. Is this a common problem with these transmissions? What should I be looking at? Any advice would be greatly appreciated!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:39 AM

0

ClearTheCode admin answer:

Hard shifting and delayed engagement in your 2020 Dodge Charger GT's 8-speed automatic transmission are concerning symptoms that warrant prompt attention. While the ZF 8HP transmission is generally robust, issues can arise. Here's what could be happening:

Common Causes:

  1. Low or Contaminated Transmission Fluid: This is often the first thing to check. Low fluid levels can cause pressure issues, leading to hard shifts and delays. Contaminated fluid (burnt smell, dark color) indicates internal wear.
  2. Transmission Control Module (TCM) Software Glitch: Sometimes, a simple software update or reflash of the TCM can resolve erratic shifting behavior. The TCM learns your driving style, and sometimes this adaptive learning can get confused.
  3. Solenoid Issues: The transmission uses solenoids to control fluid flow and engage gears. A failing or sticking solenoid can cause harsh shifts or delays.
  4. Valve Body Problems: The valve body is the hydraulic control center of the transmission. Issues within the valve body can lead to improper fluid routing and shifting problems.
  5. Internal Wear: While less likely at 45,000 miles without severe abuse, internal clutch pack wear or other mechanical issues could cause these symptoms.

Diagnostics & Next Steps:

  1. Check Transmission Fluid: Consult your owner's manual for the correct procedure to check the transmission fluid level and condition. Note that many modern transmissions are sealed and require special tools/procedures.
  2. Scan for Codes: Even without a check engine light, a professional scan tool can often pull 'pending' or 'history' codes related to the transmission control module (TCM). Look for codes like:
    • P0700: Transmission Control System Malfunction (general TCM fault)
    • P07xx series: Specific codes related to shift solenoids, pressure control, or gear ratio errors.
  3. Reset Adaptive Learning: In some cases, disconnecting the battery for 15-30 minutes can reset the TCM's adaptive learning, which might temporarily alleviate minor issues.

When to See a Shop:

  • Immediately: If the problem worsens, you hear grinding noises, or the transmission slips severely. Continuing to drive with significant transmission issues can lead to catastrophic failure.
  • Soon: If checking the fluid doesn't reveal an obvious issue, or if you're uncomfortable performing the check yourself. A qualified transmission specialist can accurately diagnose the problem, perform software updates, or identify internal component failures. Ignoring these symptoms can lead to much more expensive repairs down the line.
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