Skip the auto shop - Our mechanics make house calls

Q: Adding Transmission fluid additives

asked by on

Hello, I was wondering if adding any of the Seafoam Trans Tune fluid additive is a bad thing or if it could really help my cars transmission in regards to the little rough shifting that sometimes occurs. I also dont know if adding it to my trans fluid would result in over fill. Thank you

My car has 188300 miles.
My car has an automatic transmission.

Hi there. I’ve never been a big believer in using additives in transmission applications. The purpose of an "additive" is to mask the root cause of why a component is not working correctly.

In the case of a transmission additive, it’s usually a coagulating ingredient that expands the transmission fluid to create more hydraulic pressure which can help (for a while) with the shifting. However, the drawback of using an additive like this is that it may increase the likelihood of blowing seals, or causing additional damage to the vehicle’s transmission.

As opposed to using an additive to help your transmission, I’d start with a transmission flush first to see if that improves the rough shifting issue on your Ford Escape.

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: My car jerks when putting it into drive and sometimes has to be revved up high before going into gear

The issue you're describing is typically an indicator of an internal transmission component failure or loss of hydraulic pressure inside the transmission. The change of the motor and transmission mounts probably did not hurt the Honda's ability to accelerate correctly....

Q: Only get heat when i rev up my car or push the gas. Other tham that i only get cold air coming out.

You may have a clogged heater core that may be prohibiting the outer linings of the heater core to get hot. As you know, the heater core is a series of tubes that the coolant runs through that generates the...

Q: Power outage

Check the battery to frame ground. Also, if even the lights won't work, that usually signifies that a main fuse, or fusible link, has opened but of course the reason is why? Fuses only fail, thus protecting the circuit, if...

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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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.