Automatic transmission without pan, exposing
its metal filter
Procedure for changing the fluid and filter on a 4hp22 automatic.
3 qt of ATF fluid.
Ramps or stands.
Allen wrenches and torx screwdriver.
Brake cleaner spray.
1. First raise the car up and place on suitable
jackstands or ramps.
2. Place drain pan under and remove metric allen bolt in the
center of the pan. Do this with the fluid warm, so it drains
more completely. Avoid burning yourself on the fluid.
3. Remove the large nut holding the dipstick tube and move
the tube back a 1/2 inch or so.
4. Remove the 6 perimeter bolts and brackets on the pan, making
note that some of the brackets are angled for the corners
of the pan. Lower the pan.
5. Clean the pan out with brake spray cleaner and clean the
two rectangular magnets in the bottom. Replace rubber gasket.
6. Remove the three torx screws that hold the filter in place
and change the filter making sure to replace the oring on
the top of the filter.
7. Re-install the pan and the filler tube and fill the transmission
8. It takes approximately 3 quarts on a filter change. Dexron
ii or Mercon.
9. In the future I would change the transmission fluid at
every oil change since it only changes 50% of the fluid in
Thanks to BillRickard
no dip stick. (from Gary)
Changing transmission filter & fluid on transmission
with no dip stick.
Jack up car and put on jack stands at all four corners, keeping
car as level as possible. Remove aft drain plug from pan and
drain fluid, reinstall plug.
Remove pan, remove & replace filter. Clean pan and reinstall
with new gasket & new bolts ( bolts are self locking, one
time use ). Now comes the fun part.
The new fluid needs to be between 86 and 131 degrees F. I put
my quart bottles in the kitchen sink and filled it with hot
water while I changed the filter.
I purchased a small plastic pump & 1 gallon gas can at Auto
Zone along with 5 quarts of Dexron III.
Remove the fill plug on the side of the transmission, fill the
gas can with the warm fluid and slip in the pump, ( it comes
with a long plastic hose ).
Start the car and put the transmission in neutral.
Slip the plastic hose into the fill hole and start pumping in
When the fluid starts coming out of the fill hole stop and reinstall
That's it your done. It sounds a lot worse than it really is,
although a little time consuming.