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Re: Decoding rear differential casting number
Yes, check the SPID label, should be in the glove box. Problem is these trucks were available with many rear axles, GM, Eaton, Spicer, ect.. Good news is most medium truck axles were common and used in many makes of trucks, so parts availablilty is usually not a problem.
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1967 GMC CM-2500 Camper Cruiser, 351E V-6, NP 435 4 speed, Dana 60, and factory A/C. 2012 GMC K-3500 WT regular cab, 6.0L Vortec, 6L90.
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