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**jdl71** · 11-08-2015, 08:37 PM

The ratio is stamped on the ring gear. Remove the cover and have a look if you want to know for sure, but probably 3:73.

11-08-2015, 08:37 PM	#2
jdl71 Senior Member Join Date: Oct 2012 Location: Eldon, MO Posts: 1,753	Re: Duramax swap - Rear axle gear in c10? The ratio is stamped on the ring gear. Remove the cover and have a look if you want to know for sure, but probably 3:73. __________________ Psalm 23 64 C10 66 K20