Introduction: How to Service the Transmission on a P38 Range Rover 4.6
Tools and Supplies Needed:
Torx wrench T27
5mm Allen wrench
Funnel or Pump
6-8 quarts of Dex III Transmission Fluid
Transmission Filter Kit
Step 1: Setup
Park the caron level ground and raise the vehicle to
maximum ride height. Open the tailgate so the vehicle
will not lower back down. Place jack stands under the
vehicle for safety.
Step 2: Draining Fluid
Before removing the drain plug, check that the black
transmission cooler return line is able to be loosened,
but do not remove yet. Next, place drain pan under drain
plug and remove plug. Allow to drain for 5 to 10 minutes.
Then replace plug. Next, move drain pan under transmission
cooler return line and remove line from transmission pan.
Step 3: Removing Transmission Pan and Filter
With socket wrench and 10mm socket, remove the 6 bolts holding
the transmission pan, making sure to support pan when removing
the last 2 bolts. Keep track of where each bolt came from because
of the bracket attached to each bolt. Next, remove pan, gasket,
and filter with Torx T27 wrench. Also, remove the transmission oil
intake pipe from the old filter; you will need to re-use this on the new filter.
Step 4: Cleaning and Prep
Clean transmission pan with brake cleaner making sure
to remove any metal attached to the magnet in the
bottom of pan and check to make sure all parts of the
old gasket are removed. Attach new O-rings to new filter.
Step 5: Reassembly
First, place transmission oil intake pipe on new filter
and attach it to the transmission with the Torx T27 bolts
that were removed with the old filter. Second, place gasket
and transmission pan in place and hand tighten bolts in the
same place that the bolts were removed from. Then,
incrementally tighten bolts in an X-pattern until all bolts
are fully tightened. Lastly, attach transmission oil cooler
return line and tighten.
Step 6: Refill and Checking Fluids
Remove the transmission dipstick from engine compartment
and place funnel into tube that you removed the dipstick from.
Next, start off with placing around 6 quarts of transmission
fluid into transmission and begin checking levels. (It is very
important not to overfill.) Checking the fluid must be done with
engine cold. Start vehicle and let idle. Slowly shift down to first
gear, then back up to park, and check fluids. Repeat this process
until fluid is at the second dot on dipstick.Take the car for a test
drive to insure all is working correctly. Congratulations! You have
successfully serviced your P38, 4.6 Land Rover!