What do you need the number for exactly? Any mid 87' and up Isuzu will have the 17 spline front axles. I've ran them on the Rodeo and now the VX. I've had them apart multiple times and they sell rebuild kits with pretty much all the internals if you want that. Rugged Ridge is coming out with a new design hub that looks almost identical to the Aisins but slightly bigger, looks beefier but if the materials are weaker that doesn't mean crap. They look nice though:
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