Skip the auto shop - Our mechanics make house calls

Q: Automatic transmission programming problem

asked by on

I'm having some issues with the automatic transmission in my car. While I'm driving at the speed of 30 mph, the car is showing that it is in fifth gear. Similarly, when I drive at only 45 mph, it shows sixth gear. Another weird thing is that when I'm accelerating fast, it would show downshifting gears. So, for instance, then it would shift from fifth gear to second gear. It is confusing how this transmission works and how it is possible to downshift in order to accelerate while going at the speed over 65 mph. I was told this a programming issue. What do you think? Is there any way to fix this or should I just drive this way?

A: While I agree that this is all probably bui...

While I agree that this is all probably built into the programming of the transmission computer, after looking at the Mazda service information, I see no TSB’s that states Mazda has any updates available in transmission programming to address any of these concerns. However, there is a TSB that does correct torque limitations that will correct issues with steep hillclimbs. This would affect the downshift logic, maybe under heavy acceleration you might be triggering an over torque protection feature and that is why the the transmission downshifts from 5th to 2nd. But this is purely speculation. You could take it to the dealer and get the latest software calibrations installed along with a fault survey of the transmission control unit to be sure that you do not damage the transmission in case there is a problem with the current software installed. I would have the shifting and acceleration issue checked sooner than later to avoid any major damage from happening to the transmission.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Battery went flat causing alarm to sound and won't stop after changing battery

The most common methods to deal with this situation are to put the key in each door and lock and unlock to reset the alarm. You may need to do this in the trunk or hatch lid as well. The...

Q: Gears not sticking

It sounds like the synchronizers or syncros have gone out inside your gearbox. A good transmission shop could rebuild your gearbox or install a remanufactured unit. I would recommend having a certified technician verify and diagnose this gear shifting issue.

Q: Motor smokes

Hi there. If the engine is smoking in the engine compartment area, you probably have a leak. When engine oil leaks out due to a bad gasket, it hits a hot engine part causing the smoke. This causes the oil...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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.