2017 V6 Sport jerks coming to stop

Hi all, I'm new here so if I am doing this wrong please feel free to let me know. I have a 2017 TRD Sport 4x4 auto I bought in October of 2016 and it has roughly 17k miles on it now. I, like a lot people here it seems have had my fair share of transmission related complaints. It's been in for software updates, for them to check the fluid levels, etc.. However my complaint since the first service appt. has been when coming to a stop (intermittently) it will sort of jerk like someone has lightly tapped your rear end or like if I was driving a standard and decided for whatever reason I was going to slam it into first instead of dropping into neutral under 15mph while stopping. Is this normal for this truck? I've read a lot about hunting for gears, or it not downshifting to give power when needed, all of which I can attest to, but honestly I can live with those issues. This drives me nuts and IMO makes the truck feel cheap and old. I've also done some reading on axle wrap and I don't feel this sensation is caused but that. It's been in multiple times and either they say they can't replicate or that it's completely normal.

It's basically driven me to start looking at full size options as I don't want a Canyon. I don't want to make the move because not only will I loose a lot on the deal but I actually really like the truck, I wouldn't of bought it otherwise. This issue wasn't apparent when test driving though. I know find myself barely driving it because of this luckily I didn't get rid of my nearly 300k mile Volvo when buying this as I now basically daily that. I've also considered the OV Tune and don't mind spending the money if it would resolve this issue. But the issues described seem a little different than this.

 

Sounds like the sticky rear drive shaft slip yoke. Some have grease it or had to drill a tiny hole in the yoke to vent the air that gets trapped in the end of the yoke.

If you search, there are more details on other threads

 

Not normal AT ALL!

Your dealer appears to be careless, incompetent, or maybe unwillingly to spend any time to help you with the issue.

If you are able, get your hands on a 1/2" torque wrench ($20 from Harbor Freight) set it to 52" lbs, crawl under the truck loosen or back off all the U bolts and evenly tighten them all to specs. Also make sure the drive shaft U-joint fasteners are also tighten to specs.
This would probably be your best option to make sure it is done, the second is try another dealer or private shop.
This is supposed to be done to every vehicle at the first 5k service, but its seldom if ever done.

Moreover, It's probably the most common cause for your issue with the truck.
And btw, trading into a Canyon would just open a whole set of additional issues you don't want and losing much more money on trading that one in.

Good luck!

Edit:
"Re-torque leaf spring u-bolts - forum recommended

Torque spec:
52 lb-ft (19mm)

Re-torque propeller shaft bolts - every 15k or 18 mo (severe: 5k or 6 mo)

Torque specs:
U-joint bolts - 65 lb-ft (14mm/17mm)
Center support bearing - 27 lb-ft (be careful, if it was loose, may need realignment)"

 

Thanks for the suggestions, I'll take a look under there today to see if I can visualize what you all are talking about. I believe I have a 1/2" torque wrench so I should be good to go.

 

Sport owner are not the only jerks round here

 

Driveshaft bolts torque spec?

 

My 2017 OR does it, my 2005 Ram did it and my Fiance's 2013 GMC did it. I always figured it was the truck down shifting (what the GMC dealership said). My current truck and the Ram it was kind of a light sensation; reminds me of when I was light on the clutch and put my Fiances old Colorado (manual) in first while I was braking going towards a stop light. But, the GMC was like slamming it into a lower gear and letting the engine brake.

 

Even though you adressed it, it sure sounds like axle wrap to me.

 

I have owned 6 Toyota Trucks and 1 4Runner. 6 of them have been automatics...every single one of the ATs did this from a 1996 4Runner to 2002 Tundra, to a 2002 and 2003 Tacoma to a 2005 Tundra DC and now a 2017 Tacoma. It's weird because they don't do it every time you are slowing down and I could never make any of them do it when I wanted to...but they did it whenever they wanted to with no apparent rhyme or reason but did it more often than not. I don't know what it is/was and I'm not sure anyone else can tell you either what it is 100% (surely not Toyota). None of those vehicles ever had trans. troubles either. Back when I bought my 2002 Tundra (it was first AT I owned) in 2007 it drove me so crazy I obsessed over finding out what it was. I never did for sure. Anyway, yes, it's annoying, but I don't know that it's particularly harmful if that helps any.

 

Same here. My 1998 4Runner did it and my 2002 Tundra did it often, a second or two after coming to a stop.

At least with my Tacoma it just does it approaching the first stop or two from home and then no more during further running around town. And, it’s become a lot less pronounced with only a slight thunk and push that feels like the transmission downshifting when approaching a stop.
2,000 miles on the odometer.

 

Take it back to the dealer, and keep taking it back. Document all you do. Then contact the number you got with you truck and problems. There are Lemon laws in effect. If they can't fix it report it!
Do not try to mess with it yourself as that will void the warranty

 

I've kept all my service invoices that state customer complaint etc.. I told them I was going to file a complaint with the Virginia AG and that got them to jump a little bit; sent a field tech out who promptly returned the vehicle to me saying everything was normal and he found no issues with the vehicle. It's obnoxious that it is frequent enough to be annoying to me but not the point I can replicate it on demand as someone else also said. It seems reading above that there is few people possibly observing the same thump/jerk I do. I went under yesterday to look at the leaf springs and propeller shaft just to visualize but I'm just going to bring that up at my 20k service as it's really "too new" for me to mess with. My window for the lemon law is closing (18 months in VA) I don't even know if I qualify for that anyway since I believe the dealer would need to consistently acknowledge an issue they can't fix.

 

I have a 2016 SR5 2wd access cab with V6 and auto trans, pretty much completely stock at the moment. I have experienced a similar issue when coming to a stop. I have had my trans reflashed following the TSB a while back...mainly helped with transitioning from reverse to drive...not so much with day to day driving.

Few things I'd like to mention:
-After about 1,000-1,200 miles (since TSB flash, and making sure to not disconnect battery/reset ECU) the down shift at stop seems less harsh
-Only seems to be noticeable when steering...yeah, weird...My route to work in the morning has a few turns that require a stop. Right after the TSB flash it was really bad, like someone hit the back of my truck when coming to a stop. Now, come to a stop without touching the steering wheel, no/very little harshness. And as stated, the more miles I put on the better it got, I guess some "learning" took place, assuming it has some kind of sensor somewhere that is able to "notice" the harsh downshifts.
-Lastly, I purchased a ShiftSense Pro V2 and installed about 150miles ago. This has helped tremendously in almost every aspect of the transmission. The harsh downshift (when steering) is all but gone. I am assuming the ShiftSense Pro downshifts differently than stock, but I have not verified this by switching between the two modes and logging gear changes.

I've noticed when barely moving the steering at all, engine rpm flares up. Not sure why it does this, but it seems to affect shifting.

I plan on pulling power and resetting the ECU again after this tank of gas (calculating mpg with the new ShiftSense Pro). This will reset transmission learning, and should make if violently downshift like it did post TSB. I will then test with and without ShiftSense Pro. If it the ShiftSense Pro solves the problem, then it is a Toyota trans tune problem. At which point back to the dealer I go. I will update when I reset, probably next week sometime.

Just wanted to share the info I have found around this same issue. With all that said, there are so many things it could be. Could even be a combo of trans tune shifting harshness and various hardware loose like "the hammer" pointed out. Fun stuff indeed.....

 

grease the driveline components with a high quality #2 synthetic grease

 

My truck does the same thing. Within the year I've had the truck I've noticed it a handful of times. I'm at about 16K miles. I've also noticed this when I had my 07 Camry. I'll bring it up on my next service appointment.

 

Boy, I totally read that title wrong!

 

I got a 18 and it’s got 330 miles on it. It’s done it to me 3-4 times. Only when it’s cold. I will give it 1000 miles for the transmission to learn my habits or whatever it’s doing. And will snug down the u bolts too and repot back.

 

Today, I noticed my new (2 days old) TRD Sport has a weird jerk while stopping. Not everytime and of course, will not do it at will, preventing me from showing the dealers service dept. I did not notice it while test driving. The truck has 79 miles on it. What the? The truck has an AT transmission and the v-6 engine. I have been reading all the post and not sure what to do. This is my fourth Tacoma. One manual and three AT, none of the others, including the 2014, did this annoying bother. As others have said, it is very annoying.

 

Just make sure the transmission fluid is full and give the transmission time to learn your driving style. That could take up 10k miles

 

HA! I saw the thread title and thought folks who owned 2017 Sports were not only jerks, but had to stop posting here entirely.