Did bad repair damage transmission

Car was towed back to shop who did the faulty installation on the CV joint and axle replacement and they said they cited a defective CV joint from Auto Zone. Before it was towed in, the tow truck driver had pointed out areas of the axle to photograph which I did but did not see any obvious damage. The two shops the vehicle has been to since that time for the problem that has now shown up with the transmission have said they could not replicate limp mode and that there were no codes. Yesterday I brought it to a transmission shop who said I need a new transmission, but they had no codes to give me either. It is an old transmission with a replaced solenoid pack 10,000 miles ago but drove fine until the CV incident. Since the incident with CV joint an axle, it now regularly goes into limp mode after six and half miles and will stay in that mode until I turn engine off, and then on again. The shops that I took my car to that could not replicate the limp mode but have done repairs they said were needed (replaced camshaft and oxygen fuel sensors as well as ignition and transmission mount). I wonder if there could be an overall electrical problem with the vehicle? I did not drive long when the metal on metal screeching began, but I am thinking of what the tow truck driver said about the possible damage to the transmission. I do not understand how that could harm it. Any thoughts are most welcome, and thank you.

No lights went on, and the transmission shop gave me no reasons other than "you have mechanical and electrical problems." I asked about codes, and they said there were none and axle incident could have caused transmission problems, but no explanation as to why. Took car to another shop who charges $300 to investigate the problem as I am told it is very "labor intensive". Hope to get those codes.

Just got car back. Repair shop reported: "Ground wire for body control module damaged when axle popped out. Ground wire repaired which reestablished ground to body control module. TCU is losing signal. There is no way to test values on this vehicle so there is no specific diagnosis that can be given." I asked for the codes, as that is specifically what I requested they check. The mechanic told me that the 1995 transmission for LHS does not 'hold codes' because of its poor design. As this did not comport with what I have been reading on this forum, I took car to another shop who plugged their instrument reader in and came up with the following codes: 28 and 34, one of which is something to do with a low reverse gear which he said could have something to do with torque converter. I have asked this mechanic to do a diagnostic. Do Codes 28 and 34 shed any light on this? Thank you very much.

The shop that couldn't read codes said the TCU is losing signal and recommended replacing it along with the wiring harness and valve body, however said that it would be impossible to find a wiring harness and all of that exceeds worth of the car. I am the original owner and the engine is incredibly strong. I don't want to retire this car without having confidence in the diagnosis. I will have the wires checked that you recommended, and thank you very much for the advice. Six different shops in two months have worked on this vehicle beginning with a radiator repair, new belts, ignition switch, Transmission mount etc. And I wonder if wires could be amiss from these repairs.

I just got a call from the most recent shop (the one did find codes) and they say there is no more limp mode and what was required was a new solenoid pack. I am very glad I did not junk the vehicle and want to thank you for your encouragement. This has been quite the learning experience for me and it's great you are offering your help. Thanks again!