Skip the auto shop - Our mechanics make house calls

Q: Is a flush okay for an older transmission? Or should you stick with a drain and fill.

asked by on

My truck has 124K on it. I have heard both sides of the coin. A flush could loosen up deposits and cause you more issues, or complete failure, but it makes sense to flush it as well. As far as I know, the previous owner never changed the trans fluid. Can I go with a flush or just a drain and fill to be safe?

A: Most transmission repair shops and mechanic...

Most transmission repair shops and mechanics that say they are flushing your transmission are really just transferring your fluid out and new fluid into your transmission. This fluid transfer will take twice the amount of fluid that a normal drain and fill of the transmission does. A drain and fill will only replace about 1/2 of the fluid that is in the transmission. I would recommend having the fluid transfer method to replace most of the fluid.

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: Transmission 2007 Nissan Altima

Hello - the transmission in your model (RE0F10A) is a Continuously Variable Transmission that was installed in the '07-08 Altima's, and also in some models of the the non-hybrid Nissan Rogue and Sentra those same years. I would not venture...

Q: Defrost doesn't heat up until I start driving

Hello: Although it's possible that you may have an issue with your heater, it's difficult to determine this without physically inspecting your Dodge. However, the heating system receives it's heat from coolant that circulates through your motor. It takes some...

Q: Could the problem be my brakes or shocks?

The scraping sound you're hearing may be due to the parking brake contacting the drum in hat rotor without the parking brake being applied. You may need to replace the parking brake shoe and install a new spring clip retainer,...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...