2nd Gen Changing the Differential Fluid in Your FC3S and FD3S

Changing the Differential Fluid in Your FC3S and FD3S​

Time Investment: ~30 minutes
Difficulty: Low

Tools Used:
23mm, 24mm Socket
Ratchet
Drain Pan
Fluid Pump
1.3L, 1.4 qt of 75w-90 GL-5
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Information:
  • For this guide it is implied that you already have the car in the air and on Jack Stands
  • Always remove the fill plug first, if you drain first and you can't remove the fill plug you are in trouble
  • I use Redline 75w-90 for the Differential Fluid
Steps:
1. Remove the Fill Plug with the 23mm Socket
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2. Remove the Drain Plug with a 24mm Socket and drain the fluid into the Drain Pan.
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3. Re-Install the Drain Plug and pump the Differential Fluid in through the fill hole until it seeps out of the same fill hole.
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4. Re-Install the Fill Plugs and wipe off excess oil.