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ned, i was never able to locate 10w oil anywhere, although i do believe a
guy in the WPC magazine advertises it. i do know that jack oil is a thin oil and
if we checked with the manufacturer i would not be surprised to find out that it
is a 10w or equivalent. i also know from experience that it works and never did
any damage to my transmission. i had the gyromatic which is different from the
unit you have with the fluid coupling, but the oil requirement is the same. i
also know from the imperial site that todays oils are far superior to the oils
in 1948 and even a cheap oil of today is better than the best oil of those
earlier times. i am not familiar with the tractor oil but if the viscosity
is equal to a 10w then it should also do a fine job. don't panic if you cannot
get 10w. the other oils mentioned will work equally as well and not hurt the
transmission. some products of yesteryear are not available today and for the
most part todays products are better anyway. my powerflite in my 54 chrysler
calls for a type A fluid which is almost impossible to find. i use dexron 3 and
it does a great job. dennis |
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