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ok so it looks like I got my hands on some Z1.. going to do a few drain and fills to see if fixes my problem.

Originally Posted By: Hokiefyd Originally Posted By: 2K5TSX Acura Canada uses a grey bottle.. I think it might even be the same as what the US uses. http://rdx.acurazine.com/forums/picture.php?albumid=8447&pictureid=42141 http://rdx.acurazine.com/forums/picture.php?albumid=8447&pictureid=42142...

Originally Posted By: gogozy Hi 2K5TSX, this may be a little off topic, the image of DW-1 in your post, did you purchase the DW1 from US source? I only saw 1L bottle in dealers. as for argument of full syn or not, given the usual practice of how Canadian government usually follow US policy, I...

Originally Posted By: Hokiefyd DW-1 is a new synthetic fluid which is reported to stand up to heat better (which is an issue in older Honda automatic transmissions) and maintain viscosity in colder temperatures better than Z-1. Unless one works for Honda, I'm not sure one can say with full...

Originally Posted By: Hokiefyd I generally would agree that other fluids are superior to Z-1. However, I don't agree that they're superior to DW-1, at least not based on what I've read about the new fluid and its performance properties. But honda made the switch to DW-1 purely for fuel economy...

Originally Posted By: Mau Stick with DW-1 the firmer shifts will increase the life of your transmission. But also look at replacing the pressure switches. I read the thread about the pressure switches.. it appears the TSX has two as well. No mention of any TSX owners changing these up yet...

Originally Posted By: pbm I know you didn't ask but if it were mine I would change to Redline D4 or even Maxlife or Castrol Import MV, disconnect the battery for awhile (to clear the memory) and see what happens. I don't believe Honda's ATFs are anything special... Whats the standard practice...

Originally Posted By: Rand its available mail order... like ebay etc http://cgi.ebay.com/ebaymotors/HONDA-ACU...=item3f0d11a46d great find but they don't ship to Canada. Left the car to sit for a week (drove our brand new Venza instead) and after a week the car drove beautifully.. shifted...

Originally Posted By: gogozy i recalled reading somewhere that DW1 looks more similar to modern universal ATF than Z1, and has less FM compare to Z1. DW1 is full synthetic, and i wonder why your car would shift worse when fully warm up, is it because DW1 is thin or the fluid is still overfill...

Originally Posted By: benjamming Flashing & battery disconnect are different. I'm not aware of being able to flash a factory programming update anywhere but the dealer. There is no reflash for the 2005 TSX that I know of. Its been to the dealer multiple times and its never been mentioned as an...

Originally Posted By: The_Eric Originally Posted By: 229 You may have some tranny solenoids getting weak or need an PCU flash update. My 2008 had a factory update reprogramming. Good suggestion with the re-flash. Go back to the dealer and check for any re-flashes. If none are available, have...

Originally Posted By: tdpark That does sound like worn motor mounts and worn motor mounts can affect shifting feel. I hope. The tranny otherwise shifts pretty clean.. no slip.. no loss in power.. just that I feel everything. Mechanic noticed the vibration and said my motor mount was on the way...

Well unless you hoard some Z1.. all Honda trannies will be on DW-1 if they stick to Honda fluid eventually. I really don't like how it drives. Maybe there can be an unrelated issue... praying for a motor mount issue.. the car also vibrates at 100km/h when on and off the gas... (not tire...

Just to add... I find the car drives best when it has been sitting for a few days. Also drives much better in moderate temps.. anything too hot or too cold and it shifts harder. The mourning drive into work the car is pretty decent. Drive it home from work after sitting 8 hours it shifts...

Ok.. so I know DW1 vs Z1 has been discussed a number of times on here.. but I wanted to tell my story.. and see if anyone can help. 2005 Acura TSX 5AT with Z1 from factory. Did a factory drain and fill in 2008 (45k) which was early compared to the 96k recommendation. I then had a tranny failure...