5 0 Kenworth T300 Transmission Oil Cooler 3-1281A $400 USD This is a used transmission oil cooler from a 2007 Kenworth T300. This will fit several years and models however, please match the part number to ensure an exact fit. The part number is... ConditionUsedPart Number3-1281AStock Number25242 MLS Number13885372CategoryTransmission Coolers Last Updated10/15/2025 LocationSpartanburg, SC, US Sold ByTony's Truck Parts (877) 350-___ SHOWNUMBERCall Seller Email Seller Save More Info