Transmission slow to engage, slips, noisy Torque Coverter

I had my son, rotate the flywheel with the flat side of a tire iron, through the opening of the crankshaft sensor, it was never difficult, but varied in degrees of tension. The spring is intact. I am getting ready to change the fluid and filter, so I will report back about shavings and performance.
Thanks for your reply

I pulled the pan off and there was normal amount of sludge, and I did notice, some very small metal shavings, not many but just enough that they are noticed under close inspection. All very small.

The fluid and filter change seems to have done the trick truck is running good now thank you so very much for your help

Well, it was working great, then started slipping again, sitting on side of road now, letting it cool down. Hopefully I can limp home

Dipstick showed above Max line, draining it down, and will report back

No luck, no gears at all

When I let the engine totally cool, it will engage and then slip out, Once the transmission is warm, there seems to be no engaging at all, Im getting noise from the bell housing during slipping and sometimes when the in drive or reverse. I adjusted the fluid level to day, but it didn't help. I was above max line for a day on the new fluid, but it read just right when I filled it. I also have a 4 inch piece of fuel line hose on of the steel cooling tubes, if that would matter. I checked the bands while I had the pan off, and one seemed to lift a bit more than than the other, I left them alone on adjusting because the performance seems to be fluid issue. The oil that came out today, was only a day old and seemed a little dark to me, I stuck my finger in it and it was still red and slick, but it seemed to had lost a bit of tranlusence. I adusted the fluid level enging running in Nuet, with the drain plug by dipstick port. It only dripped and seemed to have sometimes a bit of pressure pushing it out a bit more rapidly. I get noise when in gear but no noticeable engine rpm fluctuations.
Would it be overheating? The I had only driven about 5 miles before it failed. And the only journey prior was 8 miles to work. So the fluid change repaired it for 15 miles or so.

Not so much noise when it's engaging, as I said above, the noise starts just before it fails and during attempts while it has failed, it ran very quiet during the first 15 miles, I thought we had nailed it. Then I get the noise just before it falls out of gear.

Oh well, thanks for your help