I know this topic has been done before, but has anyone actually managed to change their Auto Transmission Fluid? This is my experience of trying to change my IS250's fluid.
This is something that's been going round my head for the last couple of months. My car is on about 72k miles and, although I know it's supposed to be sealed for life, I'm a bit skeptical and thought I'd do some preventative maintenance. On the whole, my gearbox is fine, but there are some occasions, though very occasionally, where I feel the changes are a bit 'un-lexus', but maybe it's just me.
I decided to go ahead with a flush - mainly because I don't think my car is at the point where changing the oil at once would cause a problem and the amount of drain & fills it would take to change the oil would be 5 or 6. Also, there are loads of threads from the UK and US that say don't flush, but I couldn't find one where someone had said 'I've flushed my transmission with the correct fluid and it's broken'.
I booked it into a transmission specialist. I ended up speaking to a person, who was the senior technician, 3 times to alleviate my paranoia. Essentially we agreed I would supply my own fluid (they use a generic one) and they wouldn't use the cleaner & conditioner (just do a straight swap of the fluid using their machine). I also felt stupid about asking them how they would check the oil level (knowing what a faff it is) and they knew how it needed to be done.
Has anyone actually managed to get hold of the Toyota WS fluid? It seems to be available like running water in the US, but after trawling the internet there's nowhere online that sells it here. Lexus dealer wanted £15 a litre and seemed extremely reluctant to sell it to me so I gave up there. I tried the local Toyota dealership and asked for World Standard fluid, but when it came it was Dextron 3. They seemed to think WS fluid had been superseded/bettered by Dextron 3. At least that's what they said they would put in their cars if they need it (I was under the assumption that the Hybrids and latest Toyota autos ran on WS fluid). I felt a bit stupid questioning the guy (I'm sure he gets fed up of dealing with idiots like me who claim to know better after half an hour's internet research) but I'm pretty sure D3 and WS are not compatible. Isn't WS much thinner?
Anyway, I didn't take the D3. I'm not superstitious, but having spent the last 3 weeks worrying about the situation, I took this as a sign it is not meant to be and gave up. I'll leave my transmission as it is! With my current mileage, it'll be at least 4 years before I hit 100k miles so hopefully there won't be any problems.