Truck Repair: Engine dies, torque converter clutch, torque converter clutch solenoid

Question
My 95 Ford F-150 (300 cu.in. 6-cyl, auto/OD, A/C, 240,000 miles) has recently developed the annoying habit of dying on me. It occurs when I shift out of D into R, and vice versa. Also when I slow down and come to a stop at red lights. Sometimes the engine idle will speed up a bit when cornering, but I don't know if this is related. I took it to the local Ford dealer, and he tells me it's the torque converter and some solenoid that he can fix for $1,000. I had the transmission completely overhauled 2 years ago to the tune of $2,500 and they tell me it's a fuel related problem...maybe an injector, fuel filter or pump. So who's right? I am the original owner and I can tell you that I don't remeber EVER changing the fuel pump (is it in the tank?) and don't know where the fuel filter is located, so I don't think I have ever changed it either. I have run some Marvel Mystery Oil through the gas at times (supposed to clean out the injectors, but I haven't noticed any difference). Don't know what else to add, unless you have some questions. You can respond here, or to my work address, jt20 AT txstate.edu

Thanks for your time and knowledge. Bob.

Answer
Hello Bob,
I am curious what happens if you shift out of drive into neutral, and then back to drive, rather than reverse.
The solenoid would probably be the torque converter clutch solenoid, but I would expect it to pull down and die without the shift if that were the case.
The pump is probably inside the tank, but surely don't change it without testing the pressure first. I would want a pressure tester connected and go for a ride, and see if the pressure drops, causing the stall, or if the pressure remains up to spec till AFTER the engine dies.
A vacuum leak, like the brake booster, or the EGR valve sticking could cause the die.
Connect a vacuum gauge, and go for the ride again.
Or both connected for the same ride.

Van