My last e4od burned up the torque converter and overheated badly. My cousin gave me a running 4r100 and after searching the forums it seemed to be an easy swap with the help of the tci valve body performance kit. Installed the kit but had to use the 4r100 converter. Installed in the truck and ran it. The transmission at idle in gear surges between being in gear and out of gear. Both in drive and reverse. Doesn’t make a difference whether in d or 1 or 2. Is it from the 4r100 converter or something else? The kit said to use an e4od converter otherwise it could have slipping feel between shifts. But once moving down the road it shifts fine. Only have problem at idle stopped. Seems like maybe a pressure issue?