I have no idea what this is or what its for... it came with parts for my 1942 Chevy 1-1/2 ton. It is about 4 inches wide, and the notch appears to be pinion related?? I should probably mention that my truck is a G506 4x4 Army truck, with a front and rear differential. I have completely rebuilt both, and don't recall seeing this when doing so.
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Last edited by 1942-G506; 12/09/2025 2:02 PM. Reason: additional info
WW2Chevy
1942 Chevrolet G506 1-1/2 ton 4x4 Army Cargo w/ winch

(Retro-roco)