I want to get back to pre f37 recall. What’s my options? I asked suncoast and they seemed to be clueless.

Options are very limited!
I think you only have a very few options since GDE is not doing TCM's for the US market anymore. (thanks to the evil EPA thugs)

1. Find and purchase a used TCM that never had the F37 flash done to it. (very rare)
2. Find a used TCM that has the econo GED flash done to it. (doable, a couple have been sold on this forum)
3. Find someone who can perform a reprogram/modify shift points on your TCM. (if you find someone who can perform this service, please share)

Maybe another member of LOST like My66Dodge who is in the business can offer suggestions of who might be able to modify a TCM's shift points?

Dude you are so helpful thank you! Yeah I read about suncoast working out a solution with this and offering it for 250$ but this isn’t reality? Such a shame. I don’t quite get why gde would stop trans tunes since that is only going to help emissions and the reason behind the reprogram in the first place was just to bolster the weak TC. But they seem to be throwing their hands up with all of it. Oh well. Can’t I just pretend to be from Canada? Or some other country that still has freedom?

A possible workaround.
Sent you a private eMail & a PM.
Can't post public due to possible evil EPA thugs may be monitoring this forum.

I wish I could have manual mode for hiway driving. Looking at specs the gde econo tune says it has 5th lock at 58mph which is pretty close to what I already have so?
Do you think anyone knows what percentage of them actually came in for the recall? Is there a way to tell if a tcm unit has been ruined from the outside or must it be driven to test the shift points?
Huh. I wish I knew more about electricity, but I could imagine a simple hack where the speed sensor input signal into the TCM could have a resistor or a pot on it so that you could trick it into thinking you were going faster than you are, and the shift points would be adjustable that way. If on a pot you could get econo mode and sport/tow mode which I could consider the f37 program to be.

The only way I know of is to drive it and see where it shifts into TC lockup/overdrive.

The sensors are are mostly 3 wire sensors,
1. a ground,
2. actual waveform signal from the sensor
3. a 5 volt reference signal.
The TCM may look at engine speed, vehicle speed, and transmission speed as there are several speed sensors supplying information to it.
Nothing is simple on this vehicle....

Okay well I’ve ordered a SUNCOAST, a transgo shift kit, a new front pump, and a fluid change with 5qt mopar juice. I almost didn’t order the front pump but y’all convinced me. Trying to track down a drb3 scanner to see about changing my tire size as big as possible. Also ordered a used TCM that will probably be neutered as well, but gives me a spare that I can send off if someone has a solution for the program.

Good for you, your Jeep will love you for it! Note: It will take more than 5qt.s ATF+4 to fill the transmission when installing a new torque converter.
Only use ATF+4 and nothing else! Also the 545RFE is a big transmission and it is most happy if you run it about 1/2 quart over the "Full when Hot" mark.

FYI, the SnapOn Verus scanner can also set the tire size if you can find a local shop that has one and a person that knows how to use it.
Or go to a dealer that has the DRBIII and pay them to change the tire size in the body computer. They can do this without changing anything else.

Great thanks for the intel. I was thinking 5qt seemed a little light for it. So, I read that the biggest size in the drb3 is 235/75 which is only 2% bigger than stock, but I thought i saw an inch size listed as options in the ecu that was like 30” or 30.5 significantly bigger than 235 so my hope was to maybe see that as option on one of these. Maybe the snap on is better?