How to Tell When Your Vehicle Needs a Transmission Flush

How to Tell When Your Vehicle Needs a Transmission FlushIt's generally suggested that your transmission should be flushed every two years or 30,000 miles. However, there are some symptoms that suggest you should get a transmission flush sooner than these intervals. Because transmission issues can quickly become very expensive to repair, you'll want to take action at the first indication of trouble in this department. Here's a look at five signs that it's time for a transmission flush.

Improperly Shifts Gear

For both automatic and standard transmissions, it's of great importance to be driving with the proper amount of clean fluid. A gunked-up transmission can lead to gears changing too slowly or too quickly.


A transmission that is filled with contaminants may prevent the healthy flow of transmission fluid. When this flow is interrupted, the vehicle may lunge or surge. At this point, you'll want to make it a priority to get a transmission fluid flush, which will hopefully remedy this issue.


If you notice grinding sounds---or other worrisome noises---coming from your transmission, then you'll want to pull over and check your transmission fluid level while the vehicle is still running. Healthy transmission fluid should be red. If it appears darker in color, or the fluid level is low, then it's probably time for a flush.

Slipping Gears

Old, polluted transmission fluid can lead to a reduction in hydraulic power. In turn, there may not be enough pressure to stay in the desired gear. There's a good chance that this problem is occurring because contaminants are blocking the fluid flow.


If you put your car in gear, but it briefly stalls before it will move, then you could benefit from a transmission fluid flush.

If you need transmission maintenance, be sure to visit a reputable shop. For a transmission fluid flush in Boise, contact the experts at Red Line Transmission at (208) 314-2216. Red Line Transmission offers expert transmission rebuilds in Boise, as well as all other types of auto repair. Feel free to give Red Line Transmission a call today to schedule an appointment for any of your vehicle's repair or maintenance needs!

Red Line Transmission Blog
Posted: June 11, 2020

Written and Published By MORBiZ