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Mike C · 10-22-2018, 07:51 PM

A semi-float 14 bolt from a later truck can have gears as low as 3.23 if memory serves. It's GVWR is the same as the Dana 60 at 5500# which is higher than the Eaton in your truck which is 5200#.

This swap is fairly easy depending on your skill set. You have to be able to weld on new perches and a panhard bar mount.

I have this rear in my Jimmy from an '86 Suburban which had factory 4.10 gears. We put another in my kids Jimmy project from an '84 Suburban with 3.73 gears.

10-22-2018, 07:51 PM	#4
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,712	Re: 1971 GMC C2500 rear end questions A semi-float 14 bolt from a later truck can have gears as low as 3.23 if memory serves. It's GVWR is the same as the Dana 60 at 5500# which is higher than the Eaton in your truck which is 5200#. This swap is fairly easy depending on your skill set. You have to be able to weld on new perches and a panhard bar mount. I have this rear in my Jimmy from an '86 Suburban which had factory 4.10 gears. We put another in my kids Jimmy project from an '84 Suburban with 3.73 gears. __________________ 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