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Old 08-18-2016, 07:28 PM   #1
davepl
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What was standard gearing for a half-ton 307 in '68?

Subject line is the question... does anyone know?

I'm wondering what the gear ratio would have been by default for a 1968 GMC w/307 & TH400. I don't know the axle, unfortunately, but I presume it was the default one.
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Old 08-18-2016, 08:00 PM   #2
TwoFiftyShifter
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Re: What was standard gearing for a half-ton 307 in '68?

Ratio was 3.73 with most 307 V8s. There isn't a surefire answer 48 years later as to what is under any given truck.
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Old 08-18-2016, 08:34 PM   #3
Bigdav160
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Re: What was standard gearing for a half-ton 307 in '68?

Standard was 3.73 with 3.08 and 4.10 optional
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