Yes, the eBay listing is :
"1940 1941 1947 1948 1949 Chevy GMC truck 3.55:1 Ring and Pinion Gears 1/2 ton GM"
If that is the listing, the description is more extensive:
"New 3.55:1 ring & pinion gears for all 1940-1953 Chevy & GMC 1/2 ton trucks."
And, it could be noted that it will work on 1954 1/2 ton trucks, if you use an earlier ring-gear carrier?
