I am trying to decide whether to replace my U joint. Worst case clearance is .040 (measured with a drill bit).
That would be diametrical clearance or about .020 on each side.
Too much ?
Ford recommended to replace at 6thou ply.
Mine was about .008" by feeler gage. I used it.
0.040 is a little sloppy. It will work, but I would advertise in the classifieds and I bet you can get a better one for a fair price.
Check with Model T haven
the old adage..."if in doubt...throw it out"
New one on order!
Are the new ones decent quality?
I assume you are talking about the clearance in the yokes? If your are, .040 is just plain worn out!