|Ultradog MN said: (quoted from post at 22:39:36 06/07/10) No such thing as a 43 9N.|
Correct oil for the rear end on that tractor is a UTF meeting Ford 134D specs. Wally world, Fleet Farm, Tractor supply all sell a generic replacement. Look for 134 on the lable.
Some guys are too sick, lame or lazy to fix leaking seals etc and so run 80W90. I'ts a little thicker.
Ultradog is correct, though he could have given a little follow up information.
The 9N was made beginning in 1939, hence the "9."
Beginning in 1942 the model name was changed to the 2N, though there wasn't much difference in the two models.
The 8N came into production for the 1948 model year. It was a whole 'nother animal.
Re: hydraulic fluid. If you live in a warm weather state you might do better with 90wt mineral oil. 134 is pretty thin. Works great if you have to use the tractor in cold weather but I am not the only one to experience fast leak downs as well as major seepage through seals when I've used 134 in hot weather. I dumped it as quick as I could and went back to 90wt. What you had in there was likely hydraulic fluid that had a lot of water in it. Turns it kinda of a golden milky color.