{"product_id":"hks-4wd-transfer-oil-cooler-kit-gr-corolla-27002-at001","title":"HKS 4WD TRANSFER OIL COOLER KIT GR COROLLA 27002-AT001","description":"\u003cdiv id=\"detailTitle\"\u003eGR COROLLA GZEA14H\u003c\/div\u003e\n\u003cdiv id=\"containerWrap\"\u003e\n\u003cdiv class=\"sectionFlex\"\u003e\n\u003ch2\u003e\u003cimg src=\"https:\/\/www.hks-power.co.jp\/uploads\/logo\/cooling\/transfer_oil_cooler_kit.png\" alt=\"\" border=\"0\"\u003e\u003c\/h2\u003e\n\u003cdiv class=\"price\"\u003e\n\u003cp\u003eCode No. 27002-AT001\u003c\/p\u003e\n\u003cp class=\"yen\"\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"contents\"\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eMonitors and controls transfer oil temperature during high-load continuous driving to protect the transfer unit.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.hks-power.co.jp\/storage\/syshks\/product_db\/4LqLZnSqBMdMQsJ7cewHLZWysNPeXugPMEBcCG1k.jpg\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.hks-power.co.jp\/storage\/syshks\/product_db\/FZ18NsWLO5QytInbhfJ3XMpuxqFmFZQwtLAXv4yo.jpg\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"sectionFlex column50-50\"\u003e\n\u003cdiv class=\"leftBlock\"\u003e\n\u003ch4\u003e\u003cspan\u003e■What is Transfer Unit?\u003c\/span\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eIt is installed at the rear of the engine and changes the direction of the driving force coming from the transaxle differential case by 90 degrees before sending it to the rear wheels.\u003c\/li\u003e\n\u003cli\u003eIn the 4WD systems used in the GR Corolla, an electronically controlled coupling located in front of the rear differential adjusts the power sent to the rear wheels.\u003c\/li\u003e\n\u003cli\u003eThe system constantly fine-tunes the power distribution to achieve the ideal balance for each driving mode (NORMAL, GRAVEL, TRACK).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rightBlock\"\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.hks-power.co.jp\/storage\/syshks\/product_db\/mNDqnP9Bw9Gj9jkYS5rs2SZ0TGe6U2VxMQeVYHjS.jpg\" alt=\"\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cspan\u003e■Product Overview\u003c\/span\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eOn the GR Corolla, the transfer system switches to 2WD during continuous high-load driving to prevent overheating.\u003c\/li\u003e\n\u003cli\u003eThe HKS TRANSFER OIL COOLER helps maintain lower transfer oil temperatures, extends oil life, and protects the transfer unit.\u003c\/li\u003e\n\u003cli\u003eFor vehicles equipped with the Transfer Protection Cancel Program, full-time 4WD is available even during circuit driving by disabling the limp mode, which switches to 2WD. *(Using the cancel program may void the vehicle’s warranty. Please check your warranty terms.)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cu\u003eVehicles equipped with transfer protection control cancellation program\u003c\/u\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eJapan model: Mar\/2025 –\u003c\/li\u003e\n\u003cli\u003eNorth American model: Aug\/2024 -\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e※Vehicles manufactured from Aug\/2020 to Dec\/2020 do not feature Transfer Protective Control. \u003cbr\u003eFor details, please contact the store where you purchased the vehicle.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"sectionFlex column50-50\"\u003e\n\u003cdiv class=\"leftBlock\"\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.hks-power.co.jp\/storage\/syshks\/product_db\/GElUSPTkVwtYTMmolNZvIg2ucDcALAbMU6hK9C9k.jpg\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003eCooler pipe installation position\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rightBlock\"\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.hks-power.co.jp\/storage\/syshks\/product_db\/MPcSVN8XyggZcxKoVN4Tg1Usz0vAGSWEkLknhARh.jpg\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003eOil pump mounting position\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cspan\u003e■Components\u003c\/span\u003e\u003c\/h4\u003e\n\u003cdiv class=\"table-scroll table-unset-border-collapse\"\u003e\n\u003ctable border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransfer cooler pipe\u003c\/td\u003e\n\u003ctd\u003eOil filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOil pump\u003c\/td\u003e\n\u003ctd\u003eMounting bracket\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOil pump controller\u003c\/td\u003e\n\u003ctd\u003eHose, harness, and short parts set\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cspan\u003e■Features\u003c\/span\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eThe dedicated pipe-type cooler ensures the transfer oil is cooled without affecting engine coolant, engine oil, or I\/C cooling performance. The bracket fixing the cooler is designed to avoid obstructing airflow to the radiator and intercooler.\u003c\/li\u003e\n\u003cli\u003eHKS uses a high-load, high-flow electric oil pump, controlled by a dedicated pump controller. If the pump is operated when the oil temperature is low (high viscosity), the overcurrent protection control puts it in standby mode and automatically restarts once the oil temperature reaches an appropriate level. It’s recommended to operate the pump when the oil temperature is above 60°C to prevent overloading.\u003c\/li\u003e\n\u003cli\u003eFor vehicles equipped with a transfer protection control cancellation program, selecting the TRACK mode within 1 minute of engine startup automatically activates the pump. The pump's operating status can be checked on the controller display. The kit includes wiring from the power source to the electric pump.\u003c\/li\u003e\n\u003cli\u003eThe transfer oil outlet uses a specially designed banjo-type attachment that is resistant to impact damage. The banjo bolt has a PT1\/8 plug hole, allowing for oil changes without removing the bolt, and can also be used as a temperature sensor mounting hole.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cspan\u003e■ポンプコントローラー機能\u003c\/span\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003ePump Controller Function\u003c\/li\u003e\n\u003cli\u003eOperating modes\n\u003cul\u003e\n\u003cli\u003eAUTO mode (for vehicles without a transfer protection control cancellation program)\u003c\/li\u003e\n\u003cli\u003eFULL AUTO mode (for vehicles with a transfer protection control cancellation program)\u003c\/li\u003e\n\u003cli\u003eMANUAL mode (for maintenance)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003eCurrent value monitoring function\n\u003cul\u003e\n\u003cli\u003eWhen the pump current is above the rated value, it goes into standby mode. During standby, it operates the pump for 3 seconds every 30 seconds to monitor the current value\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003eOvercurrent protection function\n\u003cul\u003e\n\u003cli\u003eTransfer protection control cancellation function (only valid for vehicles with a transfer protection control cancellation program)\u003c\/li\u003e\n\u003cli\u003eThe transfer protection control cancellation function can be used by connecting the vehicle's \"4WD mode select switch\" connector to the pump controller.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cspan\u003e■Usage notes\u003c\/span\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eThis product is designed for circuit use where transfer oil temperatures can rise significantly. For daily driving where transfer oil isn’t heavily loaded, please keep the pump turned off.\u003c\/li\u003e\n\u003cli\u003eEven on track, avoid operating the pump when the oil temperature is still low, as this can put excessive load on the pump and piping. Use it only when oil temps are around 60°C or higher.\u003cbr\u003eIf using AUTO or FULL AUTO mode and the pump frequently starts and stops, it means the oil temperature is too low. In such cases, avoid long-term use to prevent damage.\u003c\/li\u003e\n\u003cli\u003ePlease use stock transfer oil or HKS G900 75W-90 gear oil. Do not use oil thicker than 75W-90, as they can overload the system.\u003c\/li\u003e\n\u003cli\u003eThe transfer protection control cancellation function only works on vehicles equipped with the appropriate program. If your vehicle doesn’t have this program, do not connect the “4WD mode select switch” connector — doing so will disable 4WD.\u003c\/li\u003e\n\u003cli\u003eSome vehicle modifications are required for installation:\n\u003cul\u003e\n\u003cli\u003eBoth models may also require trimming of bumper air ducts or undercover ducts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGR Corolla\u003c\/strong\u003e: Bumper reinforcement, intercooler air guide, undercover duct\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePoint!\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cp\u003eWe recommend activating the system just before starting sporty driving as a general guideline.\u003cbr\u003ePlease note that wiring and operation differ between vehicles\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ewith\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ewithout\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ethe transfer protection control cancellation program. Be sure to check your vehicle's specifications before installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cspan\u003e■Driving test data of GR Corolla at Fuji Speedway Racing Course\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.hks-power.co.jp\/storage\/syshks\/product_db\/hlvRQvw8VagAlAQ2eTdxrmh1vZmdBgomKpNyzrm7.gif\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe test was terminated when the oil temperature increased to approximately 150°C, although the oil temperature is still rising without the transfer oil cooler installed.\u003c\/li\u003e\n\u003cli\u003eThe test was terminated when the oil temperature rise settled at around 125°C with the transfer oil cooler installed.\u003c\/li\u003e\n\u003cli\u003eBased on these results, estimating the temperature at which the oil temperature becomes stable after further laps, the temperature difference with and without the transfer oil cooler is expected to reach about 80°C.　With the transfer oil cooler installed, the oil temperature can be stabilized at about 130°C even after continuous driving.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e*The above information is based on in-house testing.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"table-scroll\"\u003e\n\u003ctable class=\"list\" cellspacing=\"0\" cellpadding=\"2\" width=\"100%\"\u003e\n\u003cthead\u003e\n\u003ctr class=\"head\"\u003e\n\u003cth rowspan=\"2\" nowrap class=\"col_vehicle\"\u003eVehicle\u003c\/th\u003e\n\u003cth rowspan=\"2\" nowrap\u003eClassification\u003c\/th\u003e\n\u003cth rowspan=\"2\" nowrap\u003eModel\u003c\/th\u003e\n\u003cth rowspan=\"2\" nowrap\u003eEngine\u003c\/th\u003e\n\u003cth rowspan=\"2\" nowrap\u003eModel Year\u003c\/th\u003e\n\u003cth rowspan=\"2\" nowrap\u003eCode No.\u003c\/th\u003e\n\u003cth rowspan=\"2\" nowrap\u003eManual\u003c\/th\u003e\n\u003cth rowspan=\"2\" class=\"col_remarks\"\u003eRemarks\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"head\"\u003e\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"col_vehicle\"\u003eGR COROLLA\u003c\/td\u003e\n\u003ctd width=\"50\"\u003e4BA-\u003c\/td\u003e\n\u003ctd width=\"50\"\u003eGZEA14H\u003c\/td\u003e\n\u003ctd width=\"50\"\u003eG16E-GTS\u003c\/td\u003e\n\u003ctd width=\"50\"\u003e23\/09 -\u003c\/td\u003e\n\u003ctd nowrap\u003e27002-AT001\u003c\/td\u003e\n\u003ctd width=\"70px\"\u003e\u003ca title=\"27002-AT001_e.pdf\" href=\"https:\/\/www.hks-power.co.jp\/product_search\/product\/download\/5825\/en\/27002-AT001_e.pdf\" target=\"_blank\"\u003e\u003cimg src=\"https:\/\/www.hks-power.co.jp\/images\/common\/icon_pdf.png\" alt=\"\" width=\"35px\"\u003e\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd class=\"col_remarks\"\u003eVehicles after April 2025 are available for the transfer protection control cancel function. For other vehicles, the transfer protection control cancel function is not available.\u003cbr\u003eWiring and operation of the pump controller differ depending on if the vehicle has the cancel program.\u003cbr\u003e・Compatible with \"MORIZO Edition\".\u003cbr\u003e・Compatible with 2025 facelift model.\u003cbr\u003e・Estimated installation time: 8 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HKS","offers":[{"title":"Default Title","offer_id":48592564191332,"sku":"27002-AT001","price":3299.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0745\/6260\/1060\/files\/4LqLZnSqBMdMQsJ7cewHLZWysNPeXugPMEBcCG1k.jpg?v=1781688920","url":"https:\/\/kyp.com.au\/products\/hks-4wd-transfer-oil-cooler-kit-gr-corolla-27002-at001","provider":"KYP Performance House","version":"1.0","type":"link"}