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Longhorn Man · 01-20-2008, 12:39 PM

ok, the stock speedo gears in my GMC were for a 3.07 rear gear, and I had 275/60's on the rear. The speedo was off by one MPH at 60... which is within GM's specs, and mine too.
My burb is about to get a 3.07 rear, and I'll be installing 275/60's in the back.

01-20-2008, 12:39 PM	#6
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: WTB speedo gears ok, the stock speedo gears in my GMC were for a 3.07 rear gear, and I had 275/60's on the rear. The speedo was off by one MPH at 60... which is within GM's specs, and mine too. My burb is about to get a 3.07 rear, and I'll be installing 275/60's in the back.