Q: 2011 Camaro SS A6 trans. performed a tune then reset car back to stock. now trans shifts slower 2-3 in D but not in S sport mode

asked by on

Hi,

I installed a tune the other day on my 2011 Camaro SS Auto. I increased the shift points right at or slightly above redline to 6200RPM. The car ran great when driven aggressively but ran harsh when driven normally so I decided to remove the tune and reset my car back to stock. Now, the car shifts sluggishly from 2nd to 3rd gear during full throttle in just D mode. When I move the shifter to S sport mode, the car shifts 2-3 very quickly like it used to in D. I'm just curious why after going back to stock, the car seems bogged down in D mode but not in S mode. Prior to the tune, both D and S seemed equally aggressive. I've read that people have pulled #5 and #20 fuses to reset the ECUs mapping. Is this something that could potentially reset the engine/trans so it runs the way it used to? Again, this is just in D mode, the car runs perfectly fine in S mode.

Thanks, Andrew

My car has 46500 miles.
My car has an automatic transmission.

The learned, adaptive shift points have possibly been lost or modified. With enough time, they will re-set. However, if you remove power to the PCM and TCM (both are involved in adaptive shifting), new shift points will be learned and those will presumably be "similar" to that which existed prior to the changes that you made. As always, you should check to see if PCM/TCM software enhancements and/or updates are available for your vehicle as such can be very useful and, if implemented, will also help to streamline diagnostics (by ruling out known issues) if a problem arises. If you want this confirmed, and have an on-site diagnostic performed, please request service and the responding certified mechanic will get this taken care of for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. 2011 Camaro SS A6 trans. performed a tune then reset car back to stock. now trans shifts slower 2-3 in D but not in S sport mode

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Hood won’t close all the way

Hey Caleb. Thanks for contacting us today. Since this is likely an aftermarket hood, and we are not able to offer tips for anything beyond OEM applications, I think your best bet is to contact the manufacturer of the hood...

Q: 2000 Chevrolet Monte Carlo engine block issue

According to the re-manufacturers' catalogs, those engines are not interchangeable. I also see on www.car-part.com that they are are not interchangeable. If you conduct a search at that website you will see that the 2000 Monte Carlo 3.8L engine interchanges...

Q: hi my chevy malibu goes in reverse,neutral,park but not drive

If no power train codes appear, other than the misfiring on cylinder no. 2 which is not relevant to your issue, there may be a mechanical or hydraulic failure in the transmission such as a failed piston in a clutch...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.