The 3 speed transmission which originally came with the '52 Suburban Carryall when I bought the project back during 2012, had been cleaned up, painted red, and stored in my dry shed for the past eleven years. I have now attached it to the '56 Chevrolet car 235 6 cylinder engine. I shall put 80/90 W transmission oil in it soon (see pic).
You need to use 90 weight straight mineral oil. The new tranny oils today are too slippery to allow the syncro’s to work properly so you’ll be grinding gears. And some contain additives that attack the brass syncro’s.
Tractor Supply has it so does NAPA. Here is a link for TS.
Phil Moderator, The Engine Shop, Interiors and Project Journals
1952 Chevrolet 3100, Three on the Tree, 4:11 torque tube Updated to: ‘59 235 w/hydraulic lifters, 12v w/alternator, HEI, PCV and Power front Disc Brakes Project Journals Stovebolt Gallery Forum
