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Rear diff Ratio on 03 Spec C

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Old Dec 19, 2007 | 02:45 PM
  #1  
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tw2
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Default Rear diff Ratio on 03 Spec C

Hi Guys

Does anybody know the rear diff ratio on a 03 Spec C?

Is this the same as final drive from this list:
The SPDA - Transmission Chart

What happens if you switch the rear ratio to 4.4?

Thanks
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Old Dec 19, 2007 | 03:15 PM
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From: Class record holder at Pembrey Llandow Goodwood MIRA Hethel Blyton Curborough Lydden and Snetterton
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Its a 3.9. You have a 3.9 front diff and the centre diff is a 1:1 transfer ratio, hence rear is 3.9 also.

So if you put ina 4.4 its going to break something!
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Old Dec 20, 2007 | 11:22 AM
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From: @Junc 12, M40 Warwicksh; 01926 614522 CV33 9PL -Use 9GX for Satnav. South Mids Alcatek ECu dealer
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As jay, says.

ALL 6 speeds are 3.9 front diff. So your options are either 3.9 rear or if a UK car 3.545:- that's it.

If you are looking for a 3.9 rear diff They are the big size R180 and have an oil temperature probe in one of the plugs. No probe? Then it is probably a 4.4.

David APi
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Old Dec 20, 2007 | 09:19 PM
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Thanks guys.
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