The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Decoding rear differential casting number

**BigBird05** · 02-14-2022, 04:22 PM

Casting # don't mean much. On the RH axle tube, either on the front or on the bottom will be a stamp letters and numbers. Those will give more info as to year and gear ratio as originally made. Post those and maybe we can help.

02-14-2022, 04:22 PM	#2
BigBird05 Senior Member Join Date: Aug 2019 Location: Cheraw Posts: 1,305	Re: Rear Differential Casting Number -- How to Decode?? Casting # don't mean much. On the RH axle tube, either on the front or on the bottom will be a stamp letters and numbers. Those will give more info as to year and gear ratio as originally made. Post those and maybe we can help.