Car Doesn’t Shift After Changing Transmission Fluid
Introduction
If you’ve recently changed the transmission fluid in your car and now it’s not shifting properly, there are a few possible causes. Here are the most common ones, along with some troubleshooting tips:
1. The transmission fluid level is incorrect
The most common reason for a car not shifting after changing the transmission fluid is that the fluid level is incorrect. If the fluid level is too low, the transmission will not have enough fluid to operate properly. If the fluid level is too high, it can cause the transmission to slip.
To check the transmission fluid level, follow these steps:
1. Park the car on a level surface.
2. Shift the car into park.
3. Open the hood and locate the transmission dipstick.
4. Pull out the dipstick and wipe it clean with a rag.
5. Reinsert the dipstick into the transmission.
6. Pull out the dipstick again and check the fluid level.
The fluid level should be between the “full” and “low” marks on the dipstick. If the fluid level is low, add more fluid until it reaches the correct level. If the fluid level is high, drain some fluid until it reaches the correct level.
2. The transmission fluid is the wrong type
Another common reason for a car not shifting after changing the transmission fluid is that the fluid is the wrong type. Different transmissions require different types of fluid, so it’s important to use the correct type of fluid for your car.
To find out what type of transmission fluid your car requires, consult your owner’s manual. You can also find the information on the transmission dipstick.
3. The transmission filter is clogged
The transmission filter helps to keep the transmission fluid clean. If the filter is clogged, it can restrict the flow of fluid and cause the transmission to malfunction.
To check the transmission filter, follow these steps:
1. Park the car on a level surface.
2. Shift the car into park.
3. Open the hood and locate the transmission pan.
4. Remove the bolts that hold the transmission pan in place.
5. Carefully remove the transmission pan.
6. Inspect the transmission filter. If the filter is clogged, replace it with a new one.
4. The transmission shift solenoids are faulty
The transmission shift solenoids are responsible for shifting the gears. If the solenoids are faulty, the transmission will not be able to shift properly.
To test the transmission shift solenoids, you will need a multimeter. Follow these steps:
1. Park the car on a level surface.
2. Shift the car into park.
3. Open the hood and locate the transmission control module (TCM).
4. Disconnect the electrical connector from the TCM.
5. Set the multimeter to the ohms setting.
6. Touch one probe of the multimeter to each terminal on the TCM connector.
7. The resistance reading should be between 10 and 15 ohms. If the resistance reading is not within this range, the solenoid is faulty and should be replaced.
5. The transmission is damaged
If the transmission fluid level is correct, the transmission fluid is the right type, the transmission filter is not clogged, and the transmission shift solenoids are not faulty, then the transmission itself may be damaged.
Transmission damage can be caused by a variety of factors, including:
* Overheating
* Lack of maintenance
* Wear and tear
* Accidents
If you suspect that your transmission is damaged, it is important to have it diagnosed by a qualified mechanic as soon as possible.
Conclusion
If your car is not shifting after you have changed the transmission fluid, there are a few possible causes. The most common causes are:
* Incorrect transmission fluid level
* Wrong type of transmission fluid
* Clogged transmission filter
* Faulty transmission shift solenoids
* Damaged transmission
If you are unable to diagnose and fix the problem yourself, it is important to have your car inspected by a qualified mechanic.
