Replaced trans because i could not get out of limp mode i replaced sensors,relays,tcm,grounds and checked all wiring. now new trans is in limp if i reset it the trans shifts great once you restart it back in limp

The main thing to remember when messing with a Chrysler product newer than 1996 is that you can not interchange modules from one vehicle to another. Does not matter if it is the exact same number or not. All modules are programmed to the VIN at the factory and will not work in any other vehicle. You must use the factory original part or order a new part and have it flashed to the VIN at the dealership.

https://www.autocodes.com/p1781_jeep.html

Your car is in limp in mode to prevent further damage to transmission. P0605 Internal TCM error.
TCM= transmission control module.

possible trans relay

you don`t say if you ever had codes pulled from the tcm or if you installed a new tcm and not a used one.if a used one you may have a bad one.also you may have to have the tcm programed to your vehicle.if in limp in mode there possibly a problem internal to the transmission.you need to have it checked out a tranny shop that you trust or is recomended by several people.

Many times on Chrysler products, one or both of the speed sensors screwed into the front of the transmission will fail, and cause the tcm to go to limp mode. Also make sure you have power to the tcm. Someone with a scanner can check these for you, or the speed sensors are less than 20 bucks each, replace them both and cross your fingers. If the transmission has internal problems, the tcm will sense this and go into limp-mode as well.

The codes mean P0700 Transmission control system malfunction. Unless you've had an automatic transmission apart before I don't recommend it to do it yourselfers. Better to get a professional opinion and avoid really messing it up. That solenoid is part of the valve body and replacing the valve body requires special tools and a bit of expertise. good luck,

You need to find someone who can pull the codes from the transmission and see what kind of trans fault it is. If there is a fault in the trans the controller will put it into limp in mode which is 2nd gear locked. Won't shift out of 2nd...You need to pull the codes and see if it is internal in the trans or an external sensor-Good Luck

THERE MUST BE SOME FAULT CODES STORED IN TCM..WHEN A FAULT OCCURS,THE TCM SHUTS THE POWER FEED OFF TO THE SHIFT SOLENOIDS IN THE SOLENOID PACK SO ALL YOU HAVE IS SECOND GEAR(LIMP MODE)..IS YOUR SPEEDOMETER WORKING?IF NOT IT MAY BE THE OUTPUT SPEED SENSOR IS BAD..YOU SHOULD GET TCM SCANNED FOR FAULT CODES..I HOPE THIS HELPS

YOU NEED TO CHECK POWER AND GROUND CIRCUITS TO TCM