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Jack-up the rear.Put a mark on thr rear housing nose and the yoke(lined up),and a mark on the backing plate and drum(lined up).Spin the wheel and count how many full turns the driveshaft makes to one turn of the wheel.After the last full spin of the driveshaft,see how far the d-shaft turns past the mark for the tire to complete it`s full turn.If the shaft spun 4 full and about a half,you have 4.56s.Five times and a little past,5.13s.Four times and a little past,4.10s.Then you`ll know what your options are to raise the ratio.Is your center-section round?That`s the Eaton HO52.If not,it`s a Dana60 and you can go to 3.73:1 with standard ring&pinion.
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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 ~
Last edited by special-K; 06-18-2005 at 09:14 AM.
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