ASE A3 Manual Drive Train and Axles Practice Test 4 ...
The contact pattern should centered between the top and the root or flank of the gears teeth, not at the top of the gears teeth like the illustration. Answer C is wrong. Adjusting ring gear backlash moves the pattern from the outer end of the ring gear (heel) to the inner end of the ring gear (toe) and visa versa. Answer D is wrong.