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What Rear Axle Do I Have?

Mossyoakglock

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Mossyoakglock Senior Enthusiast

Mossyoakglock

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I need to change the rear diff fluid on an 06 Envoy. Looking at the parts on Autozone's website, it says there are two different rear ends. 8" or 8.625" ring gear. I looked on the axle itself but couldn't find anything. What are the rpo codes for the rear axles? Any other way that I can identify the rear end for the gasket?

Z45 Senior Enthusiast

Z45

Posted
Posted

5.3L engine 4.2 pts

4.2L engine 3.6 pts

 

So it would appear the 5.3L V8 model has the bigger axle

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