Skip the auto shop - Our mechanics make house calls

Q: transmission

asked by on

Took truck to mechanic because ac not cool enough. The ac got fixed, however mechanic noticed we needed a fan clutch. No problem. All went well, until we noticed intermittent high pitched sound when there was a load. Mechanic changed out alternator and fan clutch to no avail. They only charged a little for labor. Well a few days later we noticed it would not shift into high gear, So we stopped the truck and turned the engine off, and when started back up it shifted properly. Now the rpms go up when it does not shift. The rpms are normal when it does. We have a good mechainic. He just has not figured it out. He thinks it is the transmission. could use some help joe

My car has 119000 miles.
My car has an automatic transmission.

This could be a lack of vacuum or potentially a bad shift solenoid. Most modern transmissions operate on vacuum actuated controls and solenoids both of which commonly fail at times which will cause the lack of or intermittent shifting problem you describe. If you would like a second opinion on your vehicle, consider a certified technician from YourMechanic who can come to your home or office, inspect your vehicle and make necessary repairs.

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!
  1. Home
  2. Questions
  3. transmission

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: Had battery cables and ends replaced. They said alternator and battery was good, but sometimes it will not start and needs to be jumped

Hi. There is something still draining the battery. There could be an interior light staying on and you don't realize it. Car chargers can also drain the battery when the car is off. There is also the possibility that the...

Q: Condenser fan won't turn on.

You can test the fan motor by applying power directly to the fan plug terminals (observe polarity, based on the wiring diagram). If the fan runs on 12 volts applied directly, the problem is in the control circuit, which you...

Q: Hard to turn steering wheel

Hello. If the noise is like a groaning or squealing noise, then it sounds like the power steering pump has failed. I typically start by making sure that the belt on the engine is tight. If it is not, then...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...
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...