Just picked-up a new to me 2009 Highlander. 71k miles and not sure of the history. I started replacing the fluids and have come upon an issue with the ATF drain and fill. This model has the U151E transmission (used in many Toyota applications in both sealed and non-sealed modes) with the drain and dip stick. During the ATF drain, 4 qts 6 ounces came out. I drained it cold, after sitting overnight. I've searched everywhere for the correct amount to fill and the only reference I can find is the Amsoil website. Nothing from Toyota. The Amsoil website states to refill 3.8 qts. I was thinking 4.6 is too high (from factory) so I split the difference and replaced 4.2 qts. I used Toyota WS. Anyone else replace ATF in this transmission and if so, how much drained and filled? Anyone see any issue with the current amount at 4.2? Thanks in advance for any suggestions/feedback.