Thread: SO who came up with the GMC V6's???
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Old January 12th, 2016, 08:09 AM
BobBray BobBray is offline
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Default Re: SO who came up with the GMC V6's???
My '67 has the NP435GA. The ratios are 4.56:1 1st., 2.28:1 2nd., 1.31:1 3rd., 1:1 4th.. Quite a bit closer than an SM420 as Peter and Ed pointed out! Be advised that Dodge and Ford also used a lot of NP435's, and most are wide ratio like the SM420's. Also, the NP435 was common in GMC medium duty trucks, but again these were wide ratio versions. The NP435GA was very well suited for the 351E, that engine's low r.p.m. torque didn't need the lower 1st./2nd./3rd. ratios.
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