No. The issue is the fact the car downshifts to first when costing at exactly 10mph. A PC won’t change that.
Slow roll transmission issue?
- Thread starter greynolds
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Tried the pedal commander on the 4Runner. I liked it, but eventually removed it as it keeps getting us into limp mode during dune runs with a TB stuck open code. Drive was nice with it tho..
Back to the thread, same issue with my 2020 LC dropping into 1st gear unnecessarily is part of the ‘normal’ behavior. Funny that the LX does not behave this way (maybe due to the weight difference?). I found that setting it into ECO mode or 2nd start eliminates this and drives much smoother than Normal mode. Others have mentioned that bigger tires seem to help as well.
greynolds
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Thanks for the feedback on PC - that's the sort of thing that always concerns me about a mod of that sort.
Bigger tires might change the speed it thinks you're at JUST enough that you don't reach the 10MPH threshold that downshifts to 1st gear. Regarding the LX not doing it, they probably have the transmission programmed slightly differently on the LX and LC.
I actually have to drive to the office this morning to pick up some personal items that were left when we shut the office completely down back in March (I can't believe it's been almost a year now...). It a gruelling ~7 mile back road trip both ways
, so I'll experiment with some of the ECO and 2nd start options and see what sort of results I get. I'll try to pay attention to the road while I'm poking the buttons...New here: found this forum searching because I am having the same issue on my 2021 LC. I have 1200 miles on it and I’m not sure I would be able to keep this truck if this is considered normal. Headed to Dealer tomorrow for first time for this issue but after seeing some posts it sounds like dealers don’t know much about LC’s? Not really sure what to do I bought this truck solely for it’s reliability and if this is an issue already I’m kinda worried it won’t last long.
also, if the ECT 2nd helps is there any issue with just driving with that on all the time?
also, if the ECT 2nd helps is there any issue with just driving with that on all the time?
It’s not a reliability issue. Dealer will be worthless.
Just wondering why dealers are worthless, I have seen some posts about people getting the software updated and solving the issue. Is that something they are capable of? Or you just feel they don’t work on them enough to know what they are doing?
I just installed one size larger tires in LT285/65/18 and initial impressions are that it seems to have lessened the feel of the downshift. I think the larger tire might be beneficial to this issue.
Not all dealerships are worthless. Some have very competent techs. I was just at my local dealer last week checking with them about this issue and they are not aware of anything yet from Toyota. The previous TSB was for the 2016 and 17s I believe. For me, I'm OK with the idiosyncrasy knowing that it doesnt affect transmission functionality.
No software update. So, going down there will be useless…and i would NOT want anyone taking a “peek” at my transmission due to this issue. This does NOT affect reliability nor durability of the transmission.
greynolds
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As others have said, this isn’t a reliability issue. It’s just an odd decision on how the transmission shifts gears.
I think you’ll find that the 2nd mode kind of kills acceleration. I tried it the other day and it made the LC feel pretty gutless when starting from a stop. That mode is, however, useful for the intended purpose.
Would like to understand the technical differences of the inside bits. Too bad it’s so top secret.
I have a 2021 LC200 build in Oct 2020, delivered in Dec and with about 3900 miles. I am going to try to reproduce the situation you mention and see what it does.
What I have noticed is that the 3ur-fe and 8 speed aisan combination:
- changes gear for no obvious reason at higher speeds when moving the throttle even in smaller amounts
- when slowing down with cruise control or going down a bridge at constant speed it changes up gear more enthusiastic and for longer than it really seems to need (just reducing throttle would do so it seems)
- with ECT power on it appears to behave better all together, including at lower speeds and lower speed shifts
I would therefore suggest to try ECT power mode and see how you like it.
I expect fuel economy with or without ECT pwr to be very similar. I believe that is more a function of how heavy a right foot you have and how smooth you transition through traffic and not something to worry about in an LC as it is not good in any case.
Good luck!
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1world1love
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Is it possible that the issue is the particular tuning of the shift ranges combined with the heft and torque. One of the first things I noticed when I got my LX was how touchy the gas pedal was for such a large vehicle. Combine that with a hardcoded transmission shift range and it seems like there are bound to be these situations where the transmission is not as reactive as the engine.
I am not familiar with the technical details, but I can imagine that this would play out during rolling stops and on hills and such.
I am not familiar with the technical details, but I can imagine that this would play out during rolling stops and on hills and such.
greynolds
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I have tried power mode and it does seem to improve things slightly, but not dramatically.
My guess is that it's pretty much all about the tuning of the shift ranges and is something Toyota could most likely address with a software update. The obvious question is if changing it might cause other issues. It's interesting that people who have gone to slightly larger tires report that the issue largely goes away - that could be as simple as the change in speed sensing makes the computers think the car hasn't gone below 10mph, so it doesn't downshift.
But as I stated previously, the primary consideration was whether there was a problem with my specific transmission that needed to be addressed and the answer is clearly no. I do wonder if people who are out walking or in their yards think I'm a bad or incompetent driver when they hear my engine revving strangely when I take a turn and run into this situation
.I have been considering replacing the stock tires. If I can go 1 size up without having to make any suspension changes or trim anything, that's definitely worth considering if it lessens the occurrence of this situation. The primary goal in replacing the tires would be to get something that is a bit more aggressive for mild off road use and is also better in the snow, so probably something like BFG KO2's. I was very happy with KO2's on my G63 (they were FAR better than the factory high performance summer tires in the winter and really transformed the appearance) and I previously had the original KO's on my Land Rover Discovery years ago. I'll check the appropriate tire threads for more details on what the options are.
I beg to differ on that one. Granted, I have been in the car business for going on 20 years now, mostly Toyota, and will not have any vehicle serviced outside a dealership. I do know the techs at my stores and know who the best is an only use them, but that doesn't stop anyone from the general public to ask a service advisor who their best tech is, ask to meet him, and then request him. Happens here all the time. Billy here is a savant and can probably build a Prius using only rocks and twigs, he's also my FFL guy so a one stop for LC and boom sticks. Not to mention if anything is broken I don't have to carry a pile of documents proving the correct service was done at the correct intervals and it's all reported to CARFAX. Not all small repair shops do that and good luck with them knowing as much as a 30 year Toyota franchise mechanic. I never have to worry about non-OEM parts, getting overcharged for repairs it doesn't need, or having a claim denied for my warranty for the next decade.
Not saying don't use your own guy if you feel comfortable with him, by all means use whomever ya like. We have tons of Toyotas we see here that need to have a "repair" fixed from an outside mechanic messing up so there are outside mechanics that aren't worth a damn. Basically know who is working on your rig, inside a dealership or outside.
That’s an exception, not the rule. There are only 2 things that can kill a Cruiser. Rust and incompetent/careless mechanics.
True on the what kills a cruiser, but not true on the exception to the rule. We see so many pissed off people that used a non Toyota mechanic and he messed things up a lot more than something one of our guys messed up. Not to mention if something gets messed up here, no matter how bad or how expensive the fix, it will be handled. Single point mechanic shop guy that messes up you engine and tranny and it needs $15k worth of repairs, good luck getting him to pay for it.
Use whomever you feel comfortable with and who will give you the best service. But make sure you talk to the people working on you rig and that it's a reputable place. Dealerships are not the devil and can do just as good and a lot of time better work than any outside source. Hell, some of the best LCs I've seen are Eric's, and I doubt anyone here would say they are done poorly.
