96 Chrysler goes in Limp –in Mode once car warms up. Got Codes but I need help guys!

Hey I have a 96 Chrysler LHS.

I have been doing weeks of research on my car issue, but I need some help from you guys, because Im trying to avoid getting ripped off from a mechanic! Ive been ripped off before and it's no fun! Here is my situation. My car drives PERFECTLY FINE AND REVS FINE when I just start my car and take off: in other words when the car is still cold. But once the car warms up to normal operating temperature, it goes in Limp-In Mode! So it won’t allow me to drive in anything but 2nd gear once the car gets warm.
Now I know that that is a safety feature of my 42LE/A606 Automatic Transmission, so I went to AAMCO Transmission Shop and they got Some Diagnostic Trouble Codes pulled...

... The mechanic tried to hide the codes from me with is arm. Apparently they didn't want me to figure out anything on my own :-(. FORTUNATELY I was able to peak over and see them anyway and I quickly wrote them down. Can someone out there PLEASE help me with these? Here they are:

CODE 35 --- Losss of Prime (?)
CODE 51 --- Speed error in 1st Gear (?)
CODE 74 ---? (Could have been another code in the 70’s but Im at least halfway sure it was 74).

Different codee list APPARENTLY have DIFFERENT DESCRIPTIONS so maybe SOMEBODY OUT THERE knows what code descriptions actually apply to my specific type of transmission:

(I have a A606 42LE 4 speed FWD transmission)

Here are the Diagnostic Trouble Codes (DTC) Fault Codes I found that apply to my transmission type (which is a 42LE/A606 Automatic Transmission) :
THESE ARE THE ONLY TRANSMISSION CODES THAT CAN CAUSE LIMP-IN MODE:

FAULT CODE NUMBER AND DESCRIPTION:
11 Internal Controller defect (Watchdog Test)
13 Internal Controller defect (Watchdog Shutdown)
14 TCM Relay always on
15 TCM Relay always off
16 Internal Controller defect
17 Internal Controller defect
18 Engine speed sensor
20 Switched battery
21 OD pressure switch circuits
22 2-4 pressure switch circuits
23 2-4/OD pressure switch circuits
24 LR pressure switch circuits
25 LR/OD pressure switch circuits
26 LR/2-4 pressure switch circuits
27 All pressure switches circuits
31 OD hydraulic pressure switch
32 2-4 hydraulic pressure switch
33 OD/2-4 hydraulic pressure switch circuit
35 Loss of prime
36 Fault immediately after shift
41 LR solenoid circuit
42 2-4 solenoid circuit
43 OD solenoid circuit
44 UD solenoid circuit
47 Solenoid switch valve latched in LR position
50 Speed error in Reverse
51 Speed error in 1st
52 Speed error in 2nd
53 Speed error in 3rd
54 Speed error in 4th
56 Turbine sensor error
57 Output sensor error
58 Sensor ground error

If ANYONE can use their deductive reasoning and Car Experience to figure out which problem would be the mostly likely cause of this issue? Either based on the codes or through knowledge of a similar dilemma previously encountered? Because if it something that I can fix or do myself, I wish to do it! I’m very much wishing to be a do it yourselfer and fix these issues through my own labor and effort if it is possible, so any help with trouble shooting these codes would be much appreciated... Thanks

--SYMPHONIC