Differential Backlash and Gear Mesh

Phil, on the end of the countershaft is the pinion gear that engages the differential gear. If you hold the countershaft, which holds the pinion, and gently rock the differential up and down, the play between the two is the backlash. It is adjusted by adding or removing shims on the differential carriers and at the front of the countershaft.
 
A thought, Raymond and my photos of gear pattern don't look like the Fig. B but more like Fig. A. Could this be because of the 50+ years wear on the gears?
 
I took the fellas recommendations and bought a dial indicator to check the backlash. It was in fact too tight as thought. I changed a few shims to bring the backlash within specs and it did change the pattern on the teeth closer to what the book shows. I didn't take any "after" photos though.
ibrake4rust":3i4us221 said:
A thought, Raymond and my photos of gear pattern don't look like the Fig. B but more like Fig. A. Could this be because of the 50+ years wear on the gears?
Click to expand...
This particular transmission is out of a 1970 154 with what I believe to have relatively low hours, but I would imagine that an older Cub would be very difficult to get the exact pattern that the book calls for with the 50+ years of wear you mention.
 
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