Sunday, March 1, 2015

How to change the transmission fluid and transmission filter on your Jaguar XJS

Here is the how to for replacing the transmission fluid and filter on your Jaguar XJS transmission.

Here is what you'll need and products I personally recommend:
Here is the procedure:

  • First you are going to have to set up your car and secure it on Jack Stands.
  • Now you have to remove the two 10 mm bolts that hold the plate that covers the transmission gear sensor.
  • With the plate removed you are going to need a 30 mm wrench to undo the transmission dipstick tube. Place a catch pan below the transmission, have rags in hand just in case, and undo the transmission dipstick tube.
  • When you undo it, let the transmission drain on your catch pan.

  • When it stops pouring out, start undoing the six 10 mm bolts that hold the catch pan in place.  Take out the four in towards the front of the car and loosen the two rear but leave them caught, that's to tilt the pan and drain a little more fluid.

  • See the photo below, and how the pan is tilted.

  • When the fluid is done pouring from the tilted pan, remove the last two 10 mm bolts and the pan.

  • The grey box on the photo above is the filter. Is being held in place by three TORX bolts. Remove them and pull down the filter. Make sure you use the right size TORX socket and you don't strip them. I can't remember of the top of my head what size they were.
  • This is a photo of the new filter you bought from the kit I recommended. Make sure you place the ring in place.
  • Lubricate the ring with a bit of the new transmission fluid and push the new filter in place. Make sure that the old ring from the old filter came out. Catch the TORX screws by hand first and then tighten them.
  • Wipe the pan with rags and clean the magnets. All that dirt in the magnets is the wear from your tranny (scary huh?!) but with the fluid I recommended the transmission is virtually going to stop wearing (if you service your tranny again 60'000 miles from now those magnets will still be clean if you use the fluid I recommended). Replace the gasket from your pan with the one that came in the kit.
  • Place the pan back in place, catch the screws by hand and tighten them with a 1/4 ratchet. Don't break them! Also catch the dipstick tube by hand and tighten it with the 30 mm wrench.
  • Catch the plate screws in place and tighten the plate.

  • With everything tight at the bottom, you want to go to the engine compartment and next of your oil dip stick is your transmission dipstick. Fill the transmission with the fluid with a funnel from here. Do it SLOWLY to avoid spilling. First put three quarts. Then start up the car, put it in reverse, then drive, then reverse, then drive, then reverse, then drive and finally neutral. Then check the fluid at the dipstick. It should be at the top of the cold fill level. If is not, add 1/2 a quart and repeat the reverse/drive/neutral sequence and check again. Repeat until the fluid is where is supposed to be.


  1. Yeah and you only replaced 60% of the fluid. You still have a torque converter full of dirty fluid. So this is pretty pointless.

  2. Transmission of a car place the shafts in correct position, if transmission fluid has maintained properly. Be a good car owner you need to inspect all the parts properly and make service at certain time period. Changing of transmission fluid is a tricky way. You need to change it every 60,000 miles of your car covered. Using dip-stick you would able to know the correct level of fluid.

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