After 3 weeks, all parts arrived. I got 2 flex disk kits, transmission output flange & nut, and new driveshaft (upgraded/modified as it now has grease fittings.) Here are some pictures. For almost $650.00, it runs silky smooth now. Not sure I got the flex disks on correctly. The bolts and nuts were odd, needed 6 point hex and a lot of muscle to tighten. I guess they were designed to go on with a lot of torque so that they would not loosen? I doubt all 12 of the nuts - bolts were somehow screwed up in both kits.
As for the helpful moderator, again, thanks. No more walking to back and forth to work, bumming rides, and with the heat at 99F nights, this was a real life saver. Next project -- get my A/C fixed !!!

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That's the best kind, for sure!!!

This looks to be the same issue.

DId I kill my transmission?

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__________________
ASE Master Mechanic
https://whunter.carrd.co/

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1985 300SD
1983 300D
2003 Volvo V70

https://www.boldegoist.com/

The nuts on the flex disc bolts are ovaled lock nuts intended to screw on tight the whole way.

__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13