Finally a fix from Toyota for Stumble condition (TSB 0062-18)

I can’t say I know what this means. I’ll look up the Atkinson cycle.

 

Agreed.

 

As far as the transmission itself goes, they could make it better by adding a f#&*ing dipstick!

 

LOL but then it would be manageable and user friendly and they’d be out of business. They’ve done a good job keeping the Tacoma’s as they were years ago in a few places, such as no power seats! But then they start to experiment with new age transmission technology. Unfortunately we Toyota lovers will assume we can put up with minor issues as we see them at first, until they get old. I’ve owned mine about 2 months and I’m already ready to trade it in... they really need to do something about this. My next vehicle test drive will be an hour long or more. I’m leaving no stone unturned.

 

Unfortunately it takes a good 2-300 Miles before the funky shifting starts to settle in so the 1 hour test drive would still yeild you a bipolar truck

 

Conflicting report on that from Services. I asked after they did the 62-18 on mine and they said about 30-50 miles should be sufficient for the truck to adjust to the new software and driving conditions.

 

I really like it in the Sport mode ... now my truck accelerates like my 2011

Less shifting when going up small hills ... less hunting for the right gear

Coupled with the SSP I am really liking the improved drivability ... although I only use the SSP mostly during city driving or off-road

I drive at least 75 miles M-Fr so I’m in my truck a lot. I dig it

Winter gas is here so I’m going back to at least 89 octane so I’ll see if that changes anything

 

I’d say 30-50 Miles is for the fuel trims and other sensor derived parameters to be set. Trans stupidity takes a good tank to 2 tanks worth of driving to rear it’s ugly head.

 

My experience differs from your statement. I do not know what the actual numbers are for the learning to kick in, but it is much quicker than 2 tanks in my experience.

 

Cool. I said 1 to 2 tanks. Even Mat from OVTune said you can drive 1 way for 3 weeks then change your driving and it’ll change maps again so there is no set time but it seems the longer you drive the dumber the shifting gets as it tries to get to a map that accommodates all your driving parameters.

 

I'm talking like within 50 miles. Not tanks.

If I use 4lo in a fun, meaningful way, I can notice a difference when returning to 2wd when driving home. Hell, even cruise works like normal. It would be nice to know exactly how it learns.

 

oh lord, ok, you're smart and you win. seeing as it takes that long for the fuel trims and ignition and flow to be set I hardly think that it's gone through all it's shifting maps based off of an engine that barely just got itself running efficiently by that point.
If you'd actually like to know how it learns instead of telling us facts that are wrong then start off reading the OVTune alpha thread. It'll take a LONG time to get through but by only reading Mat's posts you can get through it much quicker although you will miss 90% of the talk from people running the tune talking about how long it takes for learning to set in. If learning was all in by 50 miles then development of the tune would've been MUCH faster, in fact, it was recommended people wait at least 100 miles before giving feedback on performance and even that wasn't enough time to see the learning having an affect as people that initially loved the tune after 100 miles started complaining (myself included) that learning was setting in around the 300 mile mark(for myself) or even later. Some people didn't even notice the learning had changed things even after 1,000+ miles, just that the truck wasn't running as good as they remembered so they disconnected the battery to reboot the ECU and wallah, it was running like a champ again.
If you want the Cliff's Notes version of how the trans works without much attention devoted to the learning aspect of things (although it is briefly mentioned) read Mat's blog https://www.ovtuned.com/blogs/news/...-tacoma-transmission-and-how-we-are-fixing-it He doesn't go into depth about the learning most likely since it is being eliminated completely so it'll be a non issue. He even mentions that in the past with earlier tune version for the Tacoma that he made identical transmission tune maps so that it couldn't learn but over time the ECU will use different routines to make the transmission start shifting erratic again. It's a damn good read and I believe he said he will be adding more info about the 3.5 to the blog in the next few days

 

I'm just telling you what my truck does and how I can experience the shifting changing faster than taking tanks of fuel. You said it takes tanks to learn, I'm saying the tranny is learning all the time.

I've never said anything about the tranny being "fully learned". In fact, I'm not sure that ever happens because I can get it my truck, drive it harder than normal, and voila, it drives different.

I do agree that it takes a while for the constant habits to form, which is what you are saying, but that's not what I'm saying, and it's not what I have ever said.

 

My bad dude, I guess if you had said that clearly in your first post I wouldn't have misunderstood. Thought you were saying it was learned by 50 miles. Ya it starts early but most people don't notice it till the 1 to 2 tankful range was all I was saying.

 

Just got back from getting a TSB for the stumble/gear hunting, and they applied the “latest TSB” of TSB 0077-16. I’m assuming I’m missing a lot of changes from 0062-18, but also wondering why they would’ve given the older one.

I thought TSBs were applicable to all 3d Gens, and not just MYs

 

Whenever a updated version comes out the old TSB is automatically updated to the newer version so even though they say they put in 77-16 you still got 58-18/62-18/125-18 they are all the same....ECU code 4B04 if you want to check for your sanity's sake

 

They’re supposed to apply updates if they can recreate the problem on your vehicle. So, if they didn’t see the tranny hunting at high speed then yours is not affected.
Some techs will do what the client asks for regardless because it makes you happy, some don’t! Some will check whether it really needs it or not and apply updates accordingly.

 

Newbie here! Dont they just need to update if my Vin# is including on the STB?or they still need to recreate the problem. I have appointment this coming wendnesday(emailed my SR about The TSB, still waiting for them to reply or give me a call.TIA!

 

As far as I know the T-SB document tells the tech what to do and generally it says: if the problem exists then do this...

 

Mine has slowly reverted back to pre TSB shift quality/performance after about 3,500 miles. The 2-1 harsh shift has become more often as well. Disappointing to say the least. It was good while it lasted. The throttle pedal delay is the worst offender. You press into it & what should happen is a down shift into the next gear instead you press further to make something happen & it drops two gears which was not needed.