![]() Will talk about that later with a quick look at page 125. The report did find that 3.2TL trannies had two vendors for a thrust bearing to the 3rd clutch pack, plus other items affecting ATF flow into the 3rd clutch pack. There is no data to support that in the NHTSA report posted in the same forum. It's just the luck of the draw, who got the good sensors and who got the bad ones." "I think this is why some of the supercharged auto transmissions hold up fine while some stock ones die an early death. The OP from Acurazine also posted the following: This issue regards the 2006 and prior Odys, as you noted. I'm an AmSOil ATF user in our 2002 & 2003 Odys, and use ATF-Z1 plus Lubegard in our 1998 Accord (I've got 3 cases of Z1 I have to use up, the Accord now has 177,000 miles), so I can't personally comment on the Redline product, though I've heared nothing but positive reviews for all the fine items that Redline markets. Too-low ATF flow into a clutch pack means a few things: not enough transfer of heat over an observed time frame, so that clutch pack gets really hot (over 300-deg C mentioned earlier in the report.that's over 570-deg F) coupled with the slipping that this overheating can promote, along with thermal degradation of the clutch surfaces.ĪTF-Z1, to my knowledge is not being restocked by Honda dealers any longer, and is being replaced by their new ATF DW-1. The NHTSA analysis infers that it's an ATF low flow state into the 3rd clutch pack coupled with a surface roughness peculiarity on the 3rd clutch steels (the stationary plates in the clutch drum, sandwiched between the frictions). I don't believe it is a defect of the ATF. Third, that 3rd (pun intended) clutch is another matter entirely. Nearly every time, even on A/T's with well over 100,000 miles, those components appear to have the proper amount of wear for the given driving conditions, and look like they could very, very easily provide well in excess of another 100,000 miles of service. So far, all of the pics I've seen of 2002-2004 Ody A/T frictions and steels show that the Z1 does a great job at preserving clutch material on both sides of any given splined friction plate in the 1st, 2nd, 4th & 5th clutch packs. Second, the 2002-2004 Ody A/T's and the Acura TL A/T's referenced in that report are amazingly similar in construction, from top to bottom. Prior pages yield some excellent background information. One of the guys in your supplied link makes this claim with no material science (laboratory) or shop evidence, so I'm curious, for these reasons:įirst, those Acurazine guys found this great link: Who concluded that ATF-Z1 friction modifiers lead to excessive wearing of the clutch frictions? I'm just wondering how they arrived at that conclusion. I read the link (and others on Acurazine). But, I have the Racing ATF in my TL and it works great.Īnyone tried Redline Racing ATF in their van yet?Ĭlick to expand. This is where I felt most comfortable with my van. For me, I went with the D4 b/c it is a midpoint between the Z1 (highly friction modified) and the Racing ATF (no friction modifiers). I would be very interested to know if this fluid can also be used in our vans with no problems. For this reason, the TL guys have been able to run this fluid with no adverse affects. The Acura TL has an automatic throttle cutback feature during upshifts - this smoothes out the shift. Only you can determine when the right time it is for your van.Īs far as the fluid is concerned, the Racing ATF suggested on the other site is tried and true on those cars. My van has 92K and I changed them due to the transmission having slow upshifts and harsh downshifts. 50K and 100K miles are just simple guidelines to help with remembering that it may be a good time to change these out. ![]() ![]() You can use your discretion as to when the right time is for you and your vehicle. I recommend Redline D4 or Amsoil.įor more info, check out this discussion: These are parts # 10 & 11 in the diagram and are very easy to get to from the front wheel well.Īlso, I would highly recommend getting the factory Honda Z1 ATF out of there - it has too many friction modifiers and will eventually cause the friction plates to wear out prematurely. I just changed mine and it made a world of difference. It is a good idea to change these every 100K miles or so and will often fix any problems that you may be having. It is somewhat common knowledge among Honda transmission experts that the most common failure point on these units is the 3rd and 4th gear pressure switches. I got this info from the Acura TL forum and it also applies to our van's transmission as well - they are the exact same transmissions.įor those of you who may be experiencing transmission issues such as delayed shifts, slow shifts, harsh downshifts, or anything of the sort, you may want to try this simple fix.
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