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With one wheel stationary, a little less than one complete revolution of the other wheel results in two complete rotations of the drive shaft. What differential ration does this translate into? --TIA
 

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Richard Jemison
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Diff

Probably a 4.10 but you should turn both tires together and you will know for sure.
From 1980 newer the diffs are 4.10. From `64-79 they are 4.56
 

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Interesting. Turning both wheels, in the same direction of course, results in a little over four revolutions of the differential. So, that should be a 4.10, correct? My vehicle is a 1972 GTV 2000 that came from France. Thanks Richard
 

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Dunno about GTV's but European 2L S2 Spiders had 4.1 axles while US models had 4.56's.
 

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I thought 4.1 came in with Bosch Spiders (1982) and that earlier Euro cars had 4.3. All US market 2000s before 1982 had 4.56.

Andrew
 
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