Automatic Transmission Flush
SPECIAL TOOLS OR EQUIPMENT NEEDED
IMPORTANT - READ
BEFORE FLUSHING YOUR TRANSMISSION
flushing your transmission pull the dipstick and look closely at the
fluid. If the fluid is dark and has a burnt odor, a
transmission flush is not recommended. The recommended
service is a fluid and filter change. See DIY
Fluid and Filter Change Procedures
Transmission Fluid Flush
THINGS YOU WILL NEED
|| Automatic Transmission
Jack & Jack Stands or Ramps
|| Screwdriver, Ratchet
and Socket Set
|| Wheel Chock or Wooden
|| Drain Pan
|| Long Neck "skinny"
|| Shop Rags or Paper
Start the engine and allow it to warm
up to normal operating temperature and then shut it off.
Place a wheel chock (or wooden block) behind one of the rear
the front of the vehicle with a floor jack. Position jack
stands securely under the vehicle. Slowly lower the floor
jack until the entire weight of the vehicle rests on the jack
stands. Push on one corner of the vehicle to check stability
of jack stands - the vehicle should not move.
Or, drive the
front of the vehicle onto ramps.
Locate the two transmission oil cooler
lines. These lines run from the transmission or transaxle to
the radiator. One line carries hot ATF from the transmission
to the radiator (transmission oil cooler) and the other line carries
the cooled fluid back to the transmission.
Disconnect the lower transmission oil cooler line where it enters the
radiator. Position the drain pan to catch the fluid coming
out of the line.
underneath the hood, pull the transmission dipstick out of the
dipstick/fill tube and insert a long skinny
funnel into the fill tube.
you do not have a long skinny funnel that will fit into the dipstick
tube you can use a short funnel with a small diameter hose or tube
for using a longer funnel or a short funnel with an extension hose is
that it makes it easier to keep the funnel filled with fluid during the
remove the caps from 9 quarts of transmission fluid and position the
containers in close proximity to the funnel that you've inserted into
the dipstick tube because once you start the engine you will
continuously poor all 9 quarts into the transmission one quart
immediately after the other. As you are pouring the new fluid
into the transmission, the old fluid is being pumped out of the
transmission into the drain bucket.
the engine and pour all 9 quarts of fluid into the transmission through
the funnel trying not to allow the funnel to run dry before beginning
to add the next quart. When all 9 quarts have been added,
the engine off.
the transmission oil cooler line. Now, back up on top, remove
from the dipstick/fill tube and insert the dipstick. Be sure
the dipstick is pushed all the way down into the tube.
Now start the engine while the vehicle
is still raised and check for leaks. If no leaks are present,
shut the engine off and then lower the vehicle.
With the vehicle sitting on level
ground, start the engine and allow it to warm up to normal operating
temperature. Once warm, depress the brake pedal and move the
shifter through all gears (pausing for a couple of seconds between each
shift) before returning the shifter to the Park "P" position.
fluid level. With the engine still on and at idle, pull the
transmission dipstick and check the fluid level. If it shows
full, (or in the full range), wipe the dipstick clean then reinsert it
back into the tube. Check fluid level a second time to
the reading. If it shows full a second time, you are
If the fluid level is low, add no more than 1/3 quart of fluid - then
recheck. Repeat this process, adding less fluid each time,
the dipstick reads full, or in the full range. Do NOT
Note: Most automatic transmissions do not
have a drain plug. So, if you accidently overfill the
transmission with fluid, remove one of the oil cooler lines where it
enters the radiator to allow some fluid to drain out. Or, if
you have a small hand pump and a long small diameter hose you can pump
fluid out of the transmission through the dipstick/fill tube.
concludes the DIY
Automatic Transmission Flush Procedures.
a Transmission Estimate online