Skip the auto shop - Our mechanics make house calls

Q: My car has issues going up steep hills and the car shudders. Does replacing the transmission fix that?

asked by on

my car has issues going up steep hills; the car shudders. I can feel the gears shifting, trying to go up but i usually can't go more than 15mph on a hill. does replacing transmission fix that, or is it something else?

My car has 200000 miles.
My car has an automatic transmission.

A: This may be a sign of a dirty or [failing m...

This may be a sign of a dirty or [failing mass air flow sensor] https://www.yourmechanic.com/services/mass-airflow-sensor-replacement. The mass air flow sensor is a unit in the intake system that monitors air intake as it is mixed with fuel prior to being injected into the motor. When this fails, this can cause an imbalanced air/fuel load to be supplied to the motor which often times results in the engine starving for air or fuel. This is what causes the hesitation or loss of power you describe. This can also cause the engine to struggle to idle for the same reason. This may also be a failing transmission control module or failing speed sensors.

The transmission control module (TCM) helps regulate fuel efficiency and power while storing information about the transmission system in its memory. A faulty transmission control module, may cause the car not to increase its speed even when pressing the gas pedal and may respond poorly when you shift the gear into drive. The transmission control module has various sensors such as vehicle speed sensors, wheel speed sensors, throttle position sensors, turbine speed sensor, and transmission fluid temperature sensors that all direct information to it in order for it to perform it’s function. Other components controlled by the the TCM include a kick down switch, traction control system, and cruise control module. Any of these may also affect the way the transmission control module performs and controls the transmission and the shifting of your car. I would suggest having a professional, such as one from YourMechanic, come to your location to properly diagnose your 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: 2007 Dodge Grand Caravan - Codes P0700, P0734, P0732, P0871, P0846, and P0841

All of the codes that you listed indicate that you have a bad transmission. Since you have so many different codes for the transmission I do not think it is worth trying to fix the codes individually. The best course...

Q: Brakes Squealing

If you only replaced the brake pads and not the rotors or drums (if equipped in the rear), then you may look at getting them replaced or resurfaced. If you are getting squealing only when you push on the brakes...

Q: Should I start my car, what do I do next?

Hello there. Quite often when you experience a flooding issue like you have described, it will damage electrical components within the ignition system. The best solution is to have a professional mobile mechanic come to your location to complete a...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...