All my rear-ends are of S2-4 Alpines. They are standing up, so the lower wheel can not rotate. Then I turned the upper wheel 1 revolution and checked the upper wheel, it turned twice, one turned even more, the others turned less then 2 revs. From this my guess it that most are 3.89 or 4.22. Not your 3.70?
Does this make sense. Let me know If this sounds right, I would love to help you and get rid of all these parts. I hate scrapping all this. Robert
Sounds right the 3.89 are close but I would like a 3.70 to go with my 5 speed box I had one that I got from Roots spares in Holland but it was to loud and it seemed to get worse so I am running a 3.89 for now. Thanks for Looking. If you know anyone that has Alpine GTs the fast back cars they would have the 3.70 gear.