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**special-K** · 05-13-2012, 11:36 AM

Yeah,they called it a 4.10,but it's actually a 4.11...close enough. The front Dana 44 on a K-model is actually a 4.09. The Dana and Corporate ratios run a bit different,due to different designs,but for all practical purposes are the same ratios. When ypu look in the parts catalog you see both 4.56:1 w/Dana and 4.57:1. you see the same with 4.11w/Dana and 4.10. I always wondered why they'd make two ring & pinions only 1/100th different,then realized it said w/Dana or not.

Dana 60-4.10/HO52-4.10

Dana 60-4.56/HO52-4.57

But,the main question here is did GM offer 3.73 in K/20s with Dana 60s in 67-72?

05-13-2012, 11:36 AM	#3
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,863	Re: Dana 60 Ratios Yeah,they called it a 4.10,but it's actually a 4.11...close enough. The front Dana 44 on a K-model is actually a 4.09. The Dana and Corporate ratios run a bit different,due to different designs,but for all practical purposes are the same ratios. When ypu look in the parts catalog you see both 4.56:1 w/Dana and 4.57:1. you see the same with 4.11w/Dana and 4.10. I always wondered why they'd make two ring & pinions only 1/100th different,then realized it said w/Dana or not. Dana 60-4.10/HO52-4.10 Dana 60-4.56/HO52-4.57 But,the main question here is did GM offer 3.73 in K/20s with Dana 60s in 67-72? __________________ "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; 05-13-2012 at 08:32 PM.