cooler line flush 2009 MDX transmission with Canadian version of 3.7L Honda ATF-DW1 (previous 4 drain and fill was with Redline D4). drain and fill rear differentials with Redline D4, previously drain and filled with Amsoil ATF. ATF-Z1 was original fill and spec for the AT and rear differentials on the 2009 MDX. I was using D4 in the AT and Amsoil ATF in differentials before Honda replace Z1 with DW1, spec DPSF for rear differentials.
Drain and fill with 2.7L of Maxlife on TSX, replace OE inline filter. previously was using Maxlife.
both MDX and TSX shift better now, I believe it's the DW1 helping MDX, and filter/new fluid that help TSX. drive feel on D4 is much better than Z1, but then DW1 make it even better. I plan to use DW1 on TSX in future when I finished my last jug of Maxlife purely from economical reason, the price different of Maxlife in Canada is too close to DW1. My D4 stash will be reserved for the MDX differentials.