Leaking electrical connector was dripping tranny fluid. The real connector is inside the tranny. An intermediate housing/coupler/fluid isolator, which is there to keep the fluid away from the electrical contacts in this connector. This h/c/fi is just a plastic tube that O-ring seals the fluid BOTH out of the contacts AND from getting out of the tranny around the electrical connector to the tranny computer.

There are two O-rings that get soft. Both are available in the Metric O-ring kit from Harbor Freight and I'm sure others too. Point is, others have posted that MB doesn't offer them separate from the h/c/fi, maybe true, I went to my 4 different O-ring kits and found a perfect fit for the smaller one and a probable fit for the bigger on. Probable because the original was softer and flattened to be thinner in diameter. I've gone through tight places before: here is the process.

1) fit the housing in with no O-rings so you know the orientation and how deap and how much torque the little 8mm head brass looking screw will accept without snapping off (inside the tranny,). I used a little flash light to see the pins coming through the housing holes. There is no pre-alignment keys. You have to line up the pins and get them through the holes Before the alignment keys engage the holes in the housing.

2) grease the small O-ring with silicone and position it on the housing in its final resting place. Then repeat the install part of #1. This time you will need some mechanical assistance: I used a 1" very deep socket, about 3.5 inches long. The outside diameter was perfect fit. Then uses some leverage, I used a screw driver handle to compress the O-ring and bottom the housing. Again practice the torque on the 8 mm.

3) Now grease the big O-ring, position it on the housing, and again repeat #1 install plus the deep socket and surprisingly, it doesn't take much more force because the tranny is machined to compress the O-ring nicely. It smartly snaps in.

The screw is not required to pull the housing in, to my surprise. The housing just bottoms on the connector and the 8 mm screw just holds it from coming out.

Its funny but, the hardest part of this is R&R the plastic air effects shrouding. I hate the little sheet metal screws and there are 6 of them.

The tranny fluid was down about one quart. That low fluid was causing the P0730, erratic shifts, but most of all, no shift at all until you restart the motor.

I bought a carburetor choke cable, pulled out the stif wire, shuved it down the SHORT tranny filling hole. (How many of us have put tranny fluid in the tall tube and wondered, WHY won't the tranny shift, after a fluid change?) I just painted a white cold band and a hot black band with finger nail polish, bottomed the cable in the tranny and cut off the extra few feet of cable.