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Differential ratio

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06 Feb 2024 14:43 #254071 by Rene1746
Differential ratio was created by Rene1746
I'm after some second hand differentials, how do I tell what ratio my current ones are, and  any used ones apart from counting revolutions !!  Thanks

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06 Feb 2024 17:10 #254078 by facade
Replied by facade on topic Differential ratio
Count the teeth.
The ratio is number of crownwheel teeth / number of pinion teeth.

They are not marked on the outside.

There is no guarantee that your current differentials are "correct" for the car either, unless you had it from brand new.

If it suddenly breaks, go back to the last thing that you did before it broke and start looking there :)

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06 Feb 2024 18:53 #254080 by Busta
Replied by Busta on topic Differential ratio
The standard ratios are as follows:
98-2005 Manual: 3.9
98-2005 Automatic: 4.1
2005 onwards (all VVT models): 4.3

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  • rogerzilla
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07 Feb 2024 13:34 - 07 Feb 2024 13:41 #254103 by rogerzilla
Replied by rogerzilla on topic Differential ratio
From the 2014 brochure.  The auto is noticeably higher-geared in top.

(Sorry, the forum software munges the image but if you can't read it, manual final drive is 4.3 and auto final drive is 4.090 BUT 4th in an auto is a significant overdrive whereas 5th in a manual is direct drive).
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Last edit: 07 Feb 2024 13:41 by rogerzilla.

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