33 Ford diff info needed

[Fartman]

I have just put a second hand original diff under my 1933 Ford and was wondering what weight oil to use and how much to put back in as i would like to get rid of the old oil and replace with new oil,any info would be appricated,thanks Martin

 

[David J]

Don't wanna start another oil mess but remember SAE 140 was the replacement for the SAE 160 stuff like SAE 90 was the replacement for the SAE 110 stuff . Multi weight is NOT THE SAME as straight weight gear oil . I just use straight SAE 140 in the rear,******,u-joint & steering all the time . Some have different ideas on this but I prefer what Henry said to use . The rear & ****** I fill to the bottom of the fill plugs . The u-joint only calls for 4 oz & if overfilled it WILL LEAK .

 

[Fartman]

Thanks David.