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Re: 1969 C20 rear axle; what were the options??
My`72 K2500 has what I thought was 3.73s,although I never pulled the cover to varify.They must be 3.54s,then,because they are definately more hiway friendly than the 4.10 trucks.The guy I bought it from said he thought they were 3.73s from his hiway experience with it.At one point I had taken the wheels & tires that were on my`72 CheyenneSuper w/4.10s and put them on the GMC.They are both the same engine/trans with tachs and I`m sure the GMC had higher gears.It even ended up with the same motor in it.
So,either they were swapped,if available,or it was spec`d with 3.54s.Anyway,VTKidder,since you don`t have a Dana this is just for general knowledge.Try spinning your rear wheels and count the turns on the driveshaft.If the wheel turns right about 4 times(just past)for one d-shaft spin you have 4.10s.If the wheel goes about 4 1/2 then you have 4.56s.I`ve never had a ratio listed on a glovebox,standard or optional.
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed"
GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project)
GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling)
Tim
"Don't call me a redneck. I'm a rough cut country gentleman"
R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~
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