What is the inline filter?
Even if the oil cooler is cleaned thoroughly it is not always possible to get all the small pieces of dirt from the cooler. That filter is installed in the return line in-between the oil cooler and the automatic transmission. The filter consists of three components, a very thorough filter, a magnetic ring to catch all the little metal part and a bypass valve that opens if the filter is full. That ensures a constant oil cooler flow and guarantees that cooling of the transmission oil.
