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Mike C · 07-12-2018, 05:16 PM

Dana put a tag on all of their diffs that show the gear ratio. So unless someone has removed the tag check your front differential cover. The front and rear must match on a 4 wheel drive, at least closely. For instance if you have 4.10 in the rear the Dana may have 4.09 in the front.

So look for the tag under one of the cover bolts and that should answer the question about what the rear ratio is.

07-12-2018, 05:16 PM	#6
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,714	Re: Diff Identification/Gear Ratio Help Dana put a tag on all of their diffs that show the gear ratio. So unless someone has removed the tag check your front differential cover. The front and rear must match on a 4 wheel drive, at least closely. For instance if you have 4.10 in the rear the Dana may have 4.09 in the front. So look for the tag under one of the cover bolts and that should answer the question about what the rear ratio is. __________________ 44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax