Re: transmission/overdrive oil for R-9

Posted by Peter Packard On 2008/3/29 8:05:42

G'day all, This may be a bit after the horses have bolted but for my 2 cents, I would be cautious about using a modern Sulphur EP or a 140 weight oil in a Packard O'D as they really need some thrash of oil in the system. The o'd's have two oil levels and apart from oil levels, you have to be careful not to use a friction modified oil in them. They do have some noises, mostly due to the failure of the piss-ant crush washer in the R6 and the general wear and tear over 50 years for the R6, R9 and R10 and R11. I would counsel to use a non EP 85 - 140 in the box as the use of a sulphur enhanced EP oil should not be recommended for the roller type o'd boxes with bronze bushes in the lay shafts. There are non EP oils available which avoid Sulphur as an EP agent and are readily available for older vehicles.
Having said that, restoration and maintenance on a 70 year old car/ bike / whatever, is very much a personal decision and you can put in whatever you want. Best Regards. Peter Toet