Why Is My Automatic Transmission at High RPM Before Shifting?

Questions and Support
1

I’m facing a concerning issue with my Chevrolet vehicle’s automatic transmission. Lately, I’ve noticed that the RPMs are reaching unusually high levels before the transmission finally shifts. It’s been a bit alarming, and I wanted to see if anyone else has experienced this or has some insight into what might be going on.

Symptoms Observed

  • High RPMs: The engine revs significantly before the shift occurs.
  • Delayed Shifting: There seems to be a noticeable lag before the next gear engages.
  • Slipping: On some occasions, it feels like the transmission is slipping out of gear briefly.

Questions for Discussion

  1. Is this normal?: Can anyone confirm if high RPMs before shifting is a common characteristic of Chevrolet automatic transmissions?
  2. Possible Causes: What could be causing this delay? Is it indicative of a larger problem with the transmission or something that I can potentially fix myself?
  3. Troubleshooting Steps: What steps should I take to diagnose this issue? Are there any specific checks I can do or should I take it to a mechanic immediately?
  4. Repair Options: If it’s serious, what repair options are available? Are there common fixes for these types of issues?

Additional Thoughts

I appreciate any insights or advice on this. I’ve done some reading, but firsthand experiences and suggestions are much more helpful. Thank you in advance for any help you can provide!

1 Like
2

High RPMs before shifting can often indicate issues with transmission fluid. When the fluid is old or contaminated, it loses its viscosity, affecting the hydraulic pressure required for smooth shifts.

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3

That makes sense! I’ve noticed my shifts have been sluggish lately. Do you think a fluid change would help with that?

4

Definitely! Fresh fluid can improve shifting performance. Keep an eye out for dark fluid or burnt smell – those are signs it’s time for a change.

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5

I changed my fluid last month, but I still feel the high RPMs. Maybe it’s not just the fluid?

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6

It’s possible that the transmission filter also needs changing, or there could be a deeper mechanical issue. Have you checked for any error codes?

7

No codes have shown up, which is odd. I wonder if it could be an issue with the transmission solenoids.

8

That’s definitely a possibility! Solenoid issues can cause delayed shifting and erratic RPM behavior. Have you tried adding a fluid conditioner?

9

I haven’t! I’ll give that a shot. My mechanic also mentioned something about the torque converter. Any thoughts?

7 Likes
10

The torque converter can cause high RPMs when it’s slipping. It might be worth having it checked, especially if you notice any shuddering during acceleration.

11

Shuddering has been an issue too! I suppose I can’t ignore that anymore.

12

It sounds like you have a few things to check! Starting with the fluid and filter is a good idea, though. Don’t forget to ask about those solenoids!

13

Will do! Thanks for the support, everyone. I guess I just needed a nudge to take action.

14

And remember, if all else fails, you can always blame it on the car gremlins! They tend to mess with transmissions, I hear. :smile:

15

Haha! If only it were that simple! I’ll tackle these issues and report back.

16

I think the ECU programming plays a huge role in how automatic transmissions behave. If it’s not calibrated right, you can definitely get those high RPMs before shifting. Have you checked for software updates?

4 Likes
17

That’s a solid point! I’ve had my shift points adjusted in the past, and it made a noticeable difference in responsiveness. Anyone else have experience with recalibrating their ECU?

1 Like
18

Absolutely, recalibrating the ECU can fix shifting issues. Sometimes a simple software update resolves the high RPM problem, but it might also need a complete reprogram. Just make sure it’s done by a professional!

19

Those factory settings can be so conservative. I’ve had shops tweak mine for better performance, and it shifts like a dream now!

20

Just to add, if the transmission fluid is old or contaminated, it can also cause high RPMs before shifting. It’s worth checking that first!