I find it real hard to resist the temptation to say that using AZ for such a situation would serve you right.
To think that free advice in such matters would be beneficial, degrades the intelligence of all professional technicians. It is an obvious result of all the good free advice that does float about.
You will get a small amount of data from an OBDII scanner, but any usefull analysis will have to talk straight to the transmission controller.
A good stab at a DIY repair would include replacing the conductor plate with the modifidied version (good update for all early trans) and the plastic seal coupling where the wire harness plugs to the conductor plate. I would especially advise this if any speed sensor codes were retrieved.
Unfortunately, disconnecting the battery will also reset all the adaptation values which should then be properly relearned. This is a function best done with a proper scanner also.
Bosch Master, ASE Master, L1
33 years MB technician