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.

A: Hi there. I’ve never been a big believer in...

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: Is it an issue with the clutch or possibly something else?

Hi there. It sounds like the shifter fork inside the transmission is bent. You can remove the shifter from the transmission and see if the fork is bent. If the fork is bent, then you can bend it back. If...

Q: Having some running issues. Needing help to narrow it down.

Usually when you have a wrench logo lit up on your dash it indicates that you need an oil change. As for the EGR code, this is most likely the reason that your vehicle is running rough. A faulty EGR...

Q: When and how should you check the air pressure in the tires?

Maintaining the right air pressure in your car’s tires is vital. Your tires can lose 50% of their pressure without appearing flat, but they will wear poorly. Low tire pressure creates excessive wear on the edges of your tires, and...

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...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.