2007 at the Hammond Barn

[Paul Singleton]

Originally posted by Bob Carriere

Know the worst part... the bottom rear seal is leaking.....not I have to drain all that precious Sin-Thetic oil out... maybe I should just fill it with Vegemite and molasse....

Synthetic oil? A good friend of mine is in the business of wrecking highway trucks for salvage. He has found that differentials filled with synthetic oil have a tendency to rust the crown and pinion when left sitting for extended periods. It seems that whatever is not submerged in the oil will rust. He claims that when regular gear oil is in the axle he has pulled them apart after several years and no rust was present.
It seems to me that if a vehicle is not in regular use then synthetic gear oil may not be what to use. I know that friction and heat may be reduced when in operation but the trade off when left sitting for long periods may not be worth the benefit.

Paul