Thank you for responding and the pics. Your pics look like my car parts. Pic 4 and your comments helped me to learn that the feature in pic 4 is a feed through for the connector to the TCC. I don't think the TCC is the problem because the trans easily shifts in and out of OD, indicated by feel and a drop in RPM on the tac, when I move the selector in and out of D and OD.Anyway... it seems, to me, you are dealing with an issue I already described to check or the service data I showed has an answer. If you are dealing with random stalling, lets go back to tier 1. Fuel pressure, fuel filter, fuel lines, fuel pump.
Here new idea i just found: grab the TV cable and pull. Some resistance but slack? OK
start car, pull it. Should not have slack. If so, your car has an issue with throttle valve.
Those wires are the Gear switch sensors things that the ECM uses to monitor shifting(Monitor is key word) and also the TCC electrical. There is an o ring on the TCC solenoid apparently that if missing or not sealing can cause shift complaints. how is your TCC working
By grounding that terminal (F) You can engage the TCC manually. Do you have a tach by chance? If DIC or tach is present, use that to watch. drive a constant, and then ground it. Use alligator clips with a toggle if you want to be safe about it.
I think the low standing start and lower speed issue has been alleviated, probably by a week of the tv cable (thanks). The 1-2, 2-3 shifts or now occur at lower shift points and firmly, not harshly. I can down shift 2-1 and 3-2 easily with medium pedal application. At high speeds above 50; however, when I floor it, the engine bucks. If I press the accelerator half way, the car speeds up to 75 easily with no hesitation. When I approached a 5% grade, and pressed the accelerator farther down, the engine started bucking. This condition seems worse when the selector is when the the selector is in OD than D, but still occurs in both.
After the problem started, I checked the pressure at the fuel rail and it is in spec. About 25 k miles ago, I replaced the plugs, plug wires and fuel filter with new parts. I checked the resistance on the coil pac and it was normal, and ran a dedicated ground wire to its base. (My buddy says that I should replace the coil pack anyway, but I replaced plenty of good parts already and want to be sure first). The tv cable has good spring tension with engine stopped and running. The vacuum modulator seems to be doing its job because the shifts are not harsh and tested out on the bench.
Thank you for the training video. Here's a trouble shooting guide for transmissions that I found: THM 440-T4 (4T60) – ATSG (Automatic Transmission Service Group) – PDF Download Have a happy turkey day.