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dsraven · 03-04-2018, 09:35 PM

I have seen that before and assumed it was placed in the bore, before the bearing goes in, so the bearing has a flat surface to butt against. a radiussed surface would tend to crack the bearing if it were to be hammered in to hard. the other school of thought is that is there to keep the oil in the axle bearing should you be doing some extended side hill operation and the uphill side of the axle would normally run dry over time. if it were me, I would put it back in with the new bearing.

the original number was 111121, which interchanges to the R1502EL. here is a fitment guide from the napa site.

Buyer's Guide
Make Model Year(s)
Buick Century 1942 - 1942
Buick Century 1954 - 1955
Buick Limited 1942 - 1942
Buick Roadmaster 1942 - 1942
Buick Roadmaster 1946 - 1955
Buick Special 1942 - 1942
Buick Special 1946 - 1955
Buick Super 1942 - 1942
Buick Super 1946 - 1955
Chevrolet Truck 1500 1947 - 1957
Chevrolet Truck 3100 1/2 Ton Truck 1947 - 1959
Chevrolet Truck 3200 1/2 Ton Truck 1955 - 1959
Chevrolet Truck C10 1/2 Ton - Pickup 1960 - 1963
Chevrolet Truck C10 Panel Delivery 1960 - 1963
Chevrolet Truck K10 1/2 Ton 4WD - Pickup 1960 - 1963
Chevrolet Truck P10 1/2 Ton - Step Van 1960 - 1963
Chevrolet Truck Suburban C10 1/2 Ton 1960 - 1963
Chevrolet Truck Suburban K10 1/2 Ton 4WD 1960 - 1963
Chevrolet Truck Suburban R10 1/2 Ton 1963 - 1963
Chevrolet Truck YR 1/2 Ton 1941 - 1941
GMC Truck 100 1939 - 1959
GMC Truck 1000 1960 - 1963
GMC Truck 150 1939 - 1942
GMC Truck 150 1947 - 1959
GMC Truck 1500 1960 - 1963
GMC Truck P1000 1/2 Ton 1960 - 1963
GMC Truck P1500 1/2 Ton - Step Van 1963 - 1963
GMC Truck PB1500 1/2 Ton - Van 1963 - 1963
GMC Truck PB2500 1/2 Ton - Van 1963 - 1963
GMC Truck PM150 1952 - 1959

you should also check the axles where the bearings ride because they are effectively the inner surface of the bearing and sothe rolles run directly on the hardened area of the axle shaft. if there are pit marks or discoloured areas it could be an indicator that you need a new axle shaft. same with the area where the seal rides on the axle. if it is worn then the seal won't get a smooth surface to sealon and will fail prematurely. there is possibly a repair bearing available if you don't want to replace the axle shaft or can't find one etc. it looks like this

https://www.autozone.com/suspension-...38_203879_1651

03-04-2018, 09:35 PM	#12
dsraven Registered User Join Date: Nov 2010 Location: calgary alberta Posts: 8,499	Re: Rear Axle bearing and Seals I have seen that before and assumed it was placed in the bore, before the bearing goes in, so the bearing has a flat surface to butt against. a radiussed surface would tend to crack the bearing if it were to be hammered in to hard. the other school of thought is that is there to keep the oil in the axle bearing should you be doing some extended side hill operation and the uphill side of the axle would normally run dry over time. if it were me, I would put it back in with the new bearing. the original number was 111121, which interchanges to the R1502EL. here is a fitment guide from the napa site. Buyer's Guide Make Model Year(s) Buick Century 1942 - 1942 Buick Century 1954 - 1955 Buick Limited 1942 - 1942 Buick Roadmaster 1942 - 1942 Buick Roadmaster 1946 - 1955 Buick Special 1942 - 1942 Buick Special 1946 - 1955 Buick Super 1942 - 1942 Buick Super 1946 - 1955 Chevrolet Truck 1500 1947 - 1957 Chevrolet Truck 3100 1/2 Ton Truck 1947 - 1959 Chevrolet Truck 3200 1/2 Ton Truck 1955 - 1959 Chevrolet Truck C10 1/2 Ton - Pickup 1960 - 1963 Chevrolet Truck C10 Panel Delivery 1960 - 1963 Chevrolet Truck K10 1/2 Ton 4WD - Pickup 1960 - 1963 Chevrolet Truck P10 1/2 Ton - Step Van 1960 - 1963 Chevrolet Truck Suburban C10 1/2 Ton 1960 - 1963 Chevrolet Truck Suburban K10 1/2 Ton 4WD 1960 - 1963 Chevrolet Truck Suburban R10 1/2 Ton 1963 - 1963 Chevrolet Truck YR 1/2 Ton 1941 - 1941 GMC Truck 100 1939 - 1959 GMC Truck 1000 1960 - 1963 GMC Truck 150 1939 - 1942 GMC Truck 150 1947 - 1959 GMC Truck 1500 1960 - 1963 GMC Truck P1000 1/2 Ton 1960 - 1963 GMC Truck P1500 1/2 Ton - Step Van 1963 - 1963 GMC Truck PB1500 1/2 Ton - Van 1963 - 1963 GMC Truck PB2500 1/2 Ton - Van 1963 - 1963 GMC Truck PM150 1952 - 1959 you should also check the axles where the bearings ride because they are effectively the inner surface of the bearing and sothe rolles run directly on the hardened area of the axle shaft. if there are pit marks or discoloured areas it could be an indicator that you need a new axle shaft. same with the area where the seal rides on the axle. if it is worn then the seal won't get a smooth surface to sealon and will fail prematurely. there is possibly a repair bearing available if you don't want to replace the axle shaft or can't find one etc. it looks like this https://www.autozone.com/suspension-...38_203879_1651