[dromano]

Originally Posted by Hondasucks

If you want all the fluid changed, take it to a Subaru dealer or Subaru shop and have them flush it with a machine, it'll cost ~100-150 bucks, but it's worth it.

As for what fluid to run, I currently have Dexron III in my SVX but I plan on switching to a synthetic once I get an external filter fitted.

As for changing the front differential, it uses like 1.5 pints of 75W90 gear oil, I don't know the exact capacity since we have a bulk tank at work with a dial on it, with a notch on the dial for the front diff capacity, and I can't remember the exact number. Rear diff is pretty easy, take both plugs out, let fluid drain, clean lower plug off, reinstall lower plug, with car LEVEL, pour fluid into TOP hole until fluid is level with lower edge of upper hole, reinstall upper plug. They do not require any LSD additives since it is a viscous LSD.

To drain the front diff, remove the 22mm plug at the bottom of the front diff, it's the finned part of the transmission case, under where the front axles meet the case. There is a sealing washer on it, which you can get from the Subaru dealer for a dollar or so. Fill the front diff through the dipstick tube. (Passenger side of the transmission case) It's a short rod-type dipstick, should have "DIFF" cast into the handle.

Per the owners manual, page 10-5: front diff=1.3 qt, rear diff=.8 qt