Newbie/Stupid question! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

coorslightcowboy · 09-23-2005, 03:18 PM

How do I tell what gear ratio a front differential is? I have an old one laying around I want to sell, but wanted to know what ratio it is so I can post it.

It came out of a 89 or 90 z71

**special-K** · 09-25-2005, 09:00 AM

Count how many times the pinion spins to how many times the axle spins.The ratios are spread enough that you can guess accurately:a little more than 4 turns=4.10.a litttle less than 4 turns=3.73...

09-23-2005, 03:18 PM	#1
coorslightcowboy Registered User Join Date: Sep 2005 Location: SE OKLA Posts: 7	Newbie/Stupid question! How do I tell what gear ratio a front differential is? I have an old one laying around I want to sell, but wanted to know what ratio it is so I can post it. It came out of a 89 or 90 z71

09-25-2005, 09:00 AM	#2
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Count how many times the pinion spins to how many times the axle spins.The ratios are spread enough that you can guess accurately:a little more than 4 turns=4.10.a litttle less than 4 turns=3.73... __________________ "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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