3rd member i d

RustyRatRod said
. 39-11 = 3.55

39 ring teeth
11 pinion teeth.

39/11= 3.545454545 or 3.55.

The part number
887355 looks like a Motive Gear part number
C887355M is for a 741 case
C887355L is for a 489 case

They don't currently list one for a 742 case.