Help identifying a833

413 said

It’s real easy to tell if OD, by shifting to 3rd gear and count the turns. One turn of input then count the output, if less than one turn it’s an OD

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Huh? If it's less than one turn in 3rd, it's a standard 4 speed, since 4th gear would be 1:1, so 3rd would be less.

So is he puts it in third and the output shaft turns LESS then 1 turn to one turn of the input shaft, it's a standard 4 speed, because 3rd in an OD is 1:1.