Good morning to you. I am new to the forum. I wonder if someone can assist me with advise. I recently replaced the Torque convertor on my Jeep as the splines broke on the old one. The problem I am having is that when I start driving it kicks hard over especially into 3rd gear and wont shift up to 5th. Then after driving a while it shifts over normally in all the gears. Sometimes when I am driving a while it will kick back into 4th from 5th and stay there no matter what. The only way to fix this is to stop put it in park and switch the engine off. Then when I start it and start driving again it will start with the hard shifts and after a while shift normally again. I don't think it is the gearbox itself that is faulty but rather an electronic problem? Can anyone please assist that experienced the same problem?

you need a scan tool that can read the DTC in your TCM , probably you have an error in when this issue happen , with this code you know what happen

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ECU Tuner -EGR OFF -DPF OFF Swirl/Flap OFF, Lambda OFF , DTC OFF in many cars , not ONLY

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