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Re: Axle swap question
I believe there is a spline difference in the front axle only (4x4) and it's either 87+ or 89+ that has 30 splines (if I recall correctly).
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- Jeff
89' K5 Blazer, 2.5" lift, 35" tires 
04' GMC Yukon XL, 3/4 ton, 8.1L
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