Skip the auto shop - Our mechanics make house calls

Q: Vehicle not shifting properly

asked by on

When I am traveling at 55 or above, my vehicle will not downshift when acceleration is required. When I am accelerating from a stop, the car seems to take off normally through first and second gear, but then goes into seventh gear, causing slow acceleration. In addition, when driving within the city, from light to light, the vehicle accelerates and shifts normally.

It sounds like the transmission valve body has something sticking in it, not allowing downshifts in higher gears / speeds. I would start with a transmission fluid service to rule out low / poor quality fluid. Then move onto computer diagnostics. Your vehicle is equipped with complex control systems. A trained technician, like one from YourMechanic can read the computers and resolve your shifting problems.

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: Grinding noise, no acceleration, and filthy transmission fluid

Hello. If your batteries are dying that fast, then something is staying on electrically in your vehicle. If you do not have power windows or door then this should make it simple to diagnose. I typically start by checking...

Q: Rattling at idle, stalling in reverse - 1976 Pontiac Grand LeMans

Hello there, thanks for your question. In many cases, clicking and rattling noises, though they sound bad, are relatively minor with your 1976 Pontiac Grand LeMans. The most common causes for this would be due to the alternator, power steering...

Q: Lowering my car

Lowering your car impacts numerous functional areas of your suspension (amount of flexibility when driving over a bump), steering (reducing the steering angle available, or interference of the tire with bodywork), brakes, suspension alignment (and tire life!), reduced ground clearance...

Related articles

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.