The Cadillac ATSL transmission filter is real. Cadillac ATSL is a formal enterprise with a business license, a registered trademark, and the Industry and Commerce Bureau has determined that its product transmission filter is genuine. The filter element can only be replaced by disassembling the oil pan. If you replace it with a circulation machine, it directly circulates the oil in and out of the transmission oil pipeline. There is no need to disassemble the oil pan. You can claim 24L and pay 4S per month. and replace.