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This ARB differential case, identified as part 149/157 (Ret Spr), is a replacement case component intended for use during ARB differential rebuilds or repairs. It serves as the housing element labeled with that part reference, allowing technicians to restore or maintain ARB locker assemblies. The overview sticks to the part identity and practical use as a replacement case for differential service or rebuild applications where this numbered case is required.
ARB Sp Diff Case 149/157 Ret Spr
