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**jocko** · 01-13-2019, 11:48 PM

3.54 not available in a C30. 4.10 was standard for all V8 C30s from 6600-14000 GVWR, with the exception of those equipped with the H22/H23 11000 lb axle, which could have 5.43 or 6.17.

01-13-2019, 11:48 PM	#5
jocko Senior Member Join Date: Oct 2009 Location: Godley, TX Posts: 18,001	Re: 1972 GMC Gear Ratio 3.54 not available in a C30. 4.10 was standard for all V8 C30s from 6600-14000 GVWR, with the exception of those equipped with the H22/H23 11000 lb axle, which could have 5.43 or 6.17.