FWIW: My ‘11 Highlander (4-cyl, 2WD) has the U760E (6-speed) transmission, and it does not have dipstick. The other transmissions that Toyota used for that vehicle were the U151E (2WD, 6-cyl?) and U151F (4WD, 6-cyl?), and I don’t know whether they had dipsticks, or not. Your vehicle’s transmission model is listed on the door sill data sticker.