I've got a working used transmission from an 04 Sonata to install in my 03 Sonata. Both 4A42's but I wanted to do some recommended maintenance to the used one before installing it. I changed the axle seals, torque converter seal, and internal filter. In order to change the filter the torque converter cover had to come off. Which isn't a big deal but there's 2 small o-rings in the case to the right of the oil pump in the case flange that are recommended to be replaced once the cover is removed. The ones in there are still there and I didn't disturb them. I'm not sure what their function is. I do have an ATSG transmission guide specific to the 4A42 transmission. It doesn't even say what they are for just to replace them with new ones. I can't find a source for them on any transmission parts website or even through the dealer. Unless they are the same as other o-rings used in the back cover. They do not specifically show the o-rings illustrated in the online catalog illustration. Does anyone know if the o-rings I need are the same as the 45626B pictured on the rear cover? If you're looking at the illustration the o-rings I need are above where the installed transmission filter on the flange of the case. https://www.hyundaipartsdeal.com/Pag...=&PartNumbers=