For the rear brake cylinders, try NAPA UP 3677. I found them to be identical to the rear cylinders in my '37 SD.

The rear wheel seal is a SKF 31870. If you need new locking plate for the axle nuts, the part number GM 473629 is a current number and is available from GMPartsDirect.com

Jim

Last edited by neonman; 05/23/2019 6:47 PM.
1935 QD 1.5 ton stake bed
1937 SD 1.5 ton stake bed
1944 MS 1.5 ton stake bed
1946 PW 2 ton stake bed