The plastic ring gear in this motor is breaking where it contacts the torsion bar to the H/L doors. This gear has its teeth on a 180 degree radius with a shoulder at each end that bears up to a positive stop in the motor case. The Chrysler parts book lists the replacement as a number 2932919. Viewing a photograph of the two examples next to their original boxes from Central Jersey Motor Parts, the gears have teeth for a full 360 degrees. Obviously this cannot fit. The number that supersedes the 2932919 is 3420864, but a picture of that on EBAY looks the same as the earlier one. My question is, what is the correct part number for this application? Failing a correct gear replacement, what is the closest suitable H/L motor in the current parts world that is most easily adapted to this application? Cardone has several listed for around a hundred bucks, but the photos don't show enough to adapt to. Because the gear in question here is plastic and not machined out of bronze or something like it, this has to be a common problem. So, with respect to this type of problem, what's the best known fix? By the way, I intend to cut or replace the torsion bar and fit it with u-joints to reduce the side loads on that gear.
