The orginal post mentioned an AW70 transmission in an 84. I'm hard pressed to understand why Asian Warner & Volvo would call for Type "F" fluid in an 83 AW70 and Dexron in an 84 AW70. With the same model number, they shoud be the same transmission using the same fluid. Your two owner's manuals from the 83 and 84 calling for the swtich in types was compelling enough for me to call Autozone and ask what their books showed. Same thing, type F for an 83 and Dexron for 84. I dug deeper since all the published information says these two fluids are not interchangeable http://www.islandoilsupply.com/texaco/havolfluid.htm. The following Sinclair Oil site say Type F should be used in Volvo's 1977 through 1985 http://www.sinclairoil.com/product_data_sheets/atf%20type%20F.pdf. I purchased my 83 new and have run type F for 296,000 miles. Still the original transmission; never been touched except to change the fluid and filter. jp