Re: 1937 120C Transmission Lock Up

Posted by Packard Newbie On 2021/4/13 0:19:06

Hi Roger,

The machine shop that rebuilt my motor told me it should have a high zinc- content oil used in it. NAPA and all 'those guys' carry a 'hot rod & classic car' oil that has a zinc additive. I've been using that since initial start-up and have great oil pressure, no smoke or oil consumption. Which viscosity to use is another matter, and there seems to be drastic disparity on opinions regarding which is best, but sure you'll get lots of input from the pros on here. Chris.