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  • Member
  • Member For: 12y 10m 11d
Posted

Can anyone tell me, when replacing my diff assembly do I have to replace it with the exact same diff ratio?

And I'm wanting to buy a diff assembly to suit Ba XR6t auto

  • Member
  • Member For: 19y 4m 29d
  • Gender: Male
  • Location: ACT
Posted

If you do change your diff to a different ratio you may have to go and see your dealer...

And here is why...

The diff ratio is programmed in to the PCM [ Computer] in your car... And so your Tire revs per Mile.

Here are the numbers from my cars PCM for may BA MK2 Turbo 6 speed manual.

825 rpm per Mile / 1.6093 KM

post-11695-0-61584700-1390794540_thumb.j

  • Member
  • Member For: 19y 4m 29d
  • Gender: Male
  • Location: ACT
Posted

Sorry... Don't know. The PCM would have to be "Adjusted"...

Ford Dealer uses Computer to do so.

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