I have 2 1983 300d turbo. I have searched and found that I have a 3.07 rear gear (will need to lift the cars and check), but was wondering if any one know how to find out which transmission I have (gear ratios). cause I found this:
4sp auto
3.98-2.39-1.46-1.00 R5.47
3.90-2.30-1.41-1.00 R3.66
4.25-2.41-1.49-1.00 R5.67
3.68-2.41-1.44-1.00 R5.14

I would like to fine out which ones are in my cars.

any info will be greatly appreciated

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If everyone was the same, this would be one boring world.

1937 Chevy pu
1983 300D Turbo (250K) Daily driver
1983 300D Turbo spare motor(250k)
1965 Chevy C-10