From:Doug Miller Electronic:radarsprint -A- yahoo.com
Subject:RE: trans/primary oil? Date:Wed Jun 8 09:43:21 2011
Response to:15944
Rusty

The number you are referring to is a Harley part number.

Harley oil translates approximately to;

105=60w
75=40w
58=20w


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I want to change the oil in my 60 165 tarns/primary. I know the service manual calls for HD 75 (Med Heavy)oil, but what is everyone using/substituting?

Thanks!
Rusty Jenkins