[log1call]

You need to clear your trouble codes after every repair.
Have you cleared them since finding the connector loose?

The thump that has gone away now... we might need to diagose more yet. Check and change if faulty those other two things, then seel if the thump goes away.
The test we did proves that all the mechanical parts are ok. The trouble could all be caused by that speed sensor... or wiring.

Check the sensors as per the book if you can, do a ohms test at minimum before replacing them. I'd do the speed sensor first too, It's easier to get at and could cause excessive heat. The heat will not cause a speed sensor code though.