Quote:
Originally Posted by bigblockv6
According to the 1969 GMC Owner's Manual the NP435 was offered in two versions, the close ratio NP435GA with a 4.56:1 first gear and the NP435GL with a 6.68:1 first gear. According to the VIN your truck was built in the Baltimore assembly plant.
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I guess I'll have to see what I can find on the M25 vs. M28 NP code. Of course if I have to shift out of low at 3 MPH, that will answer the question.
As I went down to look over the truck I got overtaken with a rather nasty cold/flu thing. So I was sort of on autopilot checking it out, looking for the weakest areas, but not as thorough as I might have been. Nonetheless, I got a very good sense about the truck. There is an owners manual and a file of bills to go with it.