Twellsie 288 Posted August 8, 2020 Share Posted August 8, 2020 so today this happened! was driving along and gear changes felt a bit funny, then all of a sudden lost all drive, pulled over straight away, turned the car off then watch the puddle grow! on the plus side my tan is looking pretty good after sitting at the side of the A46 for nearly 4 hours! 2 Quote Link to post Share on other sites
Texas 507 Posted August 8, 2020 Share Posted August 8, 2020 So did you get any warning lights when drive was failing or did it just come to a stop with nothing? Hopefully it's 'just' a hydraulic line from the box to the cooler ( that sits inside the engine radiator!) and a 'simple' fix ( for simple read inexpensive!). Fingers crossed for you as it don't look like the dreaded coolant in ATF fluid ( hopefully) paul m. Quote Link to post Share on other sites
Twellsie 288 Posted August 8, 2020 Author Share Posted August 8, 2020 8 minutes ago, Texas said: So did you get any warning lights when drive was failing or did it just come to a stop with nothing? Hopefully it's 'just' a hydraulic line from the box to the cooler ( that sits inside the engine radiator!) and a 'simple' fix ( for simple read inexpensive!). Fingers crossed for you as it don't look like the dreaded coolant in ATF fluid ( hopefully) paul m. it came up with check VCS and lost all drive 1 Quote Link to post Share on other sites
gb1600e 136 Posted August 8, 2020 Share Posted August 8, 2020 Fingers crossed for you @Twellsie Has it gone to Lexus or you have it at home thinking what to do Quote Link to post Share on other sites
Mark6pot 173 Posted August 8, 2020 Share Posted August 8, 2020 Yep fingers crossed for you, coolant to ATF is a internal breakage, that looks like a radiator failure and or ATF connection to radiator. Coolant to ATF is the one I'm dreading as I'm at 135000 miles. Quote Link to post Share on other sites
steve2006 2,067 Posted August 9, 2020 Share Posted August 9, 2020 Looking at the position of the leak it points to the cooler area, there is a lot of pipe work, connecting hoses and clamps around there so hopefully nothing major and no transmission damage. 1 Quote Link to post Share on other sites
Northern isf 262 Posted August 9, 2020 Share Posted August 9, 2020 Hope its not bad news Mate 😦perhaps this preventative work whats been discussed is turning out to be something to really consider now think ill be getting mine checked this week im same year as your's. Quote Link to post Share on other sites
Twellsie 288 Posted August 9, 2020 Author Share Posted August 9, 2020 22 hours ago, gb1600e said: Fingers crossed for you @Twellsie Has it gone to Lexus or you have it at home thinking what to do yeah its with Lexus Coventry, really looking forward to their call tomorrow, honest!! 1 Quote Link to post Share on other sites
Jas K 9 Posted August 10, 2020 Share Posted August 10, 2020 Sorry to hear, exactly same thing happened to mine. Finally getting my car back this week after being with the dealer since the beginning of June. Is your car still under warranty? 1 Quote Link to post Share on other sites
Twellsie 288 Posted August 10, 2020 Author Share Posted August 10, 2020 20 minutes ago, Jas K said: Sorry to hear, exactly same thing happened to mine. Finally getting my car back this week after being with the dealer since the beginning of June. Is your car still under warranty? just had THE call from Lexus, it has turned out to be the dreaded coolant to ATF issue, i am out of warranty 3 Quote Link to post Share on other sites
Toothy 331 Posted August 10, 2020 Share Posted August 10, 2020 Sorry to hear. What is the issue specifically? How much have they quoted you? Quote Link to post Share on other sites
Twellsie 288 Posted August 10, 2020 Author Share Posted August 10, 2020 22 hours ago, Northern isf said: Hope its not bad news Mate 😦perhaps this preventative work whats been discussed is turning out to be something to really consider now think ill be getting mine checked this week im same year as your's. the dealer has said he has come across a few of these in the last 18 months Quote Link to post Share on other sites
Twellsie 288 Posted August 10, 2020 Author Share Posted August 10, 2020 Just now, Toothy said: Sorry to hear. What is the issue specifically? How much have they quoted you? transmission cooler failure. best case they replace the rad and cooler, flush engine and gearbox, replace filter etc £2300 Worst case all of the above, disassemble and remove gearbox and replace solonoids in the gear box and reassemble £3700 2 Quote Link to post Share on other sites
Toothy 331 Posted August 10, 2020 Share Posted August 10, 2020 Ouch. Was it a failed pipe? Perhaps perished with age? Keep us posted on the developments and photos if you can. I'd like to be able to check mine for signs of ageing. Would be interested in preventative maintenance as well. I use Coventry dealership too, so would be interesting to see if they could offer something like this based on their experience. Quote Link to post Share on other sites
paul99 78 Posted August 10, 2020 Share Posted August 10, 2020 Really sorry to hear this, I hope your car is back on the road soon. So it's looking like there been 3-4 instances of this failure noted on this forum over the last year or so. Would preventative maintainance be replacing the radiator? Quote Link to post Share on other sites
Twellsie 288 Posted August 10, 2020 Author Share Posted August 10, 2020 1 minute ago, paul99 said: Really sorry to hear this, I hope your car is back on the road soon. So it's looking like there been 3-4 instances of this failure noted on this forum over the last year or so. Would preventative maintainance be replacing the radiator? yes that would be my advice 1 Quote Link to post Share on other sites
4969_LXS 18 Posted August 10, 2020 Share Posted August 10, 2020 A chap in France had this happen to his ISF and the coolant attacked the clutch packs in the transmission and rendered it useless. Hopefully you've managed to get away with it @Twellsie. Not a nice bill to have, also it seems quite an expensive bill for a radiator swap and flush through. Quote Link to post Share on other sites
Twellsie 288 Posted August 10, 2020 Author Share Posted August 10, 2020 7 minutes ago, 4969_LXS said: A chap in France had this happen to his ISF and the coolant attacked the clutch packs in the transmission and rendered it useless. Hopefully you've managed to get away with it @Twellsie. Not a nice bill to have, also it seems quite an expensive bill for a radiator swap and flush through. thats a strange one as i wouldnt have thought the ATF goes anywhere near the clutch packs, so unsure how coolant could contaminate them Quote Link to post Share on other sites
Toothy 331 Posted August 10, 2020 Share Posted August 10, 2020 I think there's an liquid to liquid cooler, water and oil. I assume the heat exchanger failed and allowed transmission oil and coolant to mix. Quote Link to post Share on other sites
4969_LXS 18 Posted August 10, 2020 Share Posted August 10, 2020 @Toothy is right. There is an ATF heat exchanger built into the radiator. It helps get the transmission fluid upto temperature faster and once everything is at its operating temperature it acts as a cooler. They appear to be failing for some reason on our cars and the fluids can mix. Quote Link to post Share on other sites
Twellsie 288 Posted August 10, 2020 Author Share Posted August 10, 2020 2 minutes ago, Toothy said: I think there's an liquid to liquid cooler, water and oil. I assume the heat exchanger failed and allowed transmission oil and coolant to mix. yeah i understand how the two can mix, but as the clutch plates do not sit in ATF how can coolant get to them if ATF cant? Quote Link to post Share on other sites
4969_LXS 18 Posted August 10, 2020 Share Posted August 10, 2020 @Twellsie I haven't seen anywhere that says our clutch packs are of a dry design, if they were the gears wouldn't last long being unlubricated. The packs are on the outside of the gearsets which will be coated in ATF for lubrication along with the gears and shafts, the ATF will flow and fling around. Say worse case I wouldn't want to spend £3700 on a fix that might not work that's all. That's got to be around the same price as a new box. Just trying to help is all. Quote Link to post Share on other sites
Jas K 9 Posted August 10, 2020 Share Posted August 10, 2020 I don't know the exact reason for the cause of the issue but I had fluids in the gearbox all mix together and as a result the gearbox needed replacing. I was told that there aren't any gearboxes available so mine had to be sent to a gearbox specialist for it to be overhauled. My total warranty bill is somewhere in the region of £12k. I hope that your gearbox is ok. Quote Link to post Share on other sites
Twellsie 288 Posted August 10, 2020 Author Share Posted August 10, 2020 22 minutes ago, Jas K said: I don't know the exact reason for the cause of the issue but I had fluids in the gearbox all mix together and as a result the gearbox needed replacing. I was told that there aren't any gearboxes available so mine had to be sent to a gearbox specialist for it to be overhauled. My total warranty bill is somewhere in the region of £12k. I hope that your gearbox is ok. i've just spoken with Lexus Coventry and they are sufficiently happy that the solution they are providing will resolve all issues and will put it in writing too Quote Link to post Share on other sites
Arqum 144 Posted August 10, 2020 Share Posted August 10, 2020 So are you having just the radiator changed or the oil cooler as well? Quote Link to post Share on other sites
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