axle gear question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Ronm909 · 09-15-2009, 06:50 PM

My step dad has a 70 blazer 4x4 that he is frame off restoring, prior owner made a mess of this truck, we believe the axles may have been swapped, the rear axle perches were welded on badly and rear leaf srings are different sizes, possible accident, anyway, we opened up both differentials and counted pinion and gear teeth and we came up with 2.70 for front and 2.60 for rear, this does not seem right. is my math wrong? both pinions have 16 teeth and front ring has 43 teeth rear ring has 41, any help??? did some one swap these axles or does the front axle have a lower gear by .10.

09-15-2009, 06:50 PM	#1
Ronm909 67GMC Slammed Join Date: Feb 2009 Location: Rancho Cucamonga, Ca Posts: 255	axle gear question My step dad has a 70 blazer 4x4 that he is frame off restoring, prior owner made a mess of this truck, we believe the axles may have been swapped, the rear axle perches were welded on badly and rear leaf srings are different sizes, possible accident, anyway, we opened up both differentials and counted pinion and gear teeth and we came up with 2.70 for front and 2.60 for rear, this does not seem right. is my math wrong? both pinions have 16 teeth and front ring has 43 teeth rear ring has 41, any help??? did some one swap these axles or does the front axle have a lower gear by .10. Last edited by Ronm909; 09-15-2009 at 06:52 PM.

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