Q: Transmission staying in 3rd gear only and not shifting.

asked by on

My truck would stay in third gear for months i replaced the tran fluid and the filter but nothing would happen, my trucj would make weird nouses like it didnt wanna shift then after my changing the fluid one time the trans stayed in third gear and would not come out untill i unplugged the batter and figured out it was stuck in limp mode, what do i need to replace so it dosent do that again?

My car has 167000 miles.
My car has an automatic transmission.

Hi there. The transmission could have an issue with the shift solenoids. Check the wiring harness to the transmission case and make sure that it is plugged in. 3rd gear is the only forward gear in a 4L60E transmission that does not require electrical power. It is common for the electrical harness in the transmission to short out. I recommend checking the harness inside the transmission for continuity and if the resistance is too high or an open circuit, then replace the harness inside the transmission. If the harness is good, then it is possible that both the shift solenoids A and B have failed and need replaced. If you need further assistance with your transmission stuck in limp mode, then seek out a professional, such as one from Your Mechanic, 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. Transmission staying in 3rd gear only and not shifting.

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: Q: Fuel pump

There is a very good chance that your fuel pump is toast. That's a common problem with fuel injected cars. whether or not the fuel pump lives in the tank, most cars made since about 1985 pass the fuel through...

Q: it screams when I push the gas petal to accelerate the rpm rev high causing it to act like its losing power going up hill

This sounds like the transmission is slipping. I recommend having a transmission mechanic diagnose the slipping by checking transmission pressures, checking for trouble codes, or checking for any solenoids that are not letting it shift.

Q: 1998 Benz ML320 - how to check transmission oil level

Mercedes stopped including dipsticks on their cars when they switched to electronically controlled transmissions. One of the reasons was to discourage the owners from doing just what you are trying to do. The transmission fluid is unique, and adding dexron...

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...