Shudder on deceleration?

Hard to describe what mine is doing but as I come to a complete stop the last bit of deceleration is accompanied by a shudder and/or a feeling of lunging forward.

Truck has 1100kms.

Anyone else?

 

I have that too. I was wondering what was causing that

 

Same here. Took it in and they said it’s normal and they don’t feel it. Let me know what you all come up with.

 

Mine seems to do it occasionally

 

You probably have low ATF fluids. Seems like a handful of 3rd gens were low on trans fluids from factory.

 

Have you had your transmission fluid checked?

Try it while in S3; this eliminates lock up clutch and/or downshift logic.

Try it in neutral; this eliminates the downshift logic.

If it still does it, I'd be looking at the pinion angle and/or slip joint or hot spotted rotors.

 

I'm still fighting with my dealer and corporate to get it checked. It's getting ridiculous. These guys just don't want to do it. Have an appointment to take the service manager out on a drive this week but I'm not holding my breath.

That being said I have read that a lot of people get the fluid topped but it doesn't end up improving anything.

 

Preaching to the choir buddy.

You know what it took to get them to check mine; after two attempts at the dealer and calls to corporate?
I wanted the learning reset because I checked it myself, and found it to be 1.25 quarts low.

If you can operate a smart phone and change you're own oil; it's relatively easy to do.

 

I mean let's say I had the tools and knew what the hell I was doing...I still bought (okay leased) a new vehicle that came with what I believed to be a new vehicle warranty. What are these yahoos paid to do all day? Check codes?

All I know is I can't drive like this for the next 5 years.

 

Believe me, 'we' know...
Some of us discovered your frustration in 2015.

https://www.tacomaworld.com/threads...be-low-on-fluid-directly-from-factory.405642/

 

And I'm the fool who didn't look into this stuff. Figured one of the most respected names in the industry could be trusted with a new purchase. Man, I will NEVER see Toyota the same way again.

And on another depressing note, if this nonsense wasn't sorted out since 2015 then it probably never will be.

 

Is that a real thing!? I don’t even know where to find a spotted rotor.

I can’t even get my dealer to check the fluid. Not sure how to tackle this. Do I just roll with it and save for a new trans?

 

...brake rotor. Hard spots in the rotor, usually resulting from improper bedding of the pads and rotors.

 

It is definitely tied to the "normal"(not that I like it) downshifting of the tranny combined with the extra bump up in idle speed coming from the power steering system. I have worked with the Toyota area rep for the last couple of months. Last week (Thursday) we had 3 tacomas (besides mine) 2 17s and 1 18 and had them sitting in the dealers lot They were all cold and identical conditions we tested each one of them -- they all did it -- test it out for yourself -- the idle will jump up when you even lightly move the steering wheel whenever in D or reverse. It also bumps the idle up when you are coming to a stop or slowing down quickly. Also -- if you can SAFELY let loose of the wheel when coming to a stop -- I'll bet you -you that your hard/rough downshifts will not happen. I did not like it -- but after seeing the same results on 4 trucks -- one used like mine, this was the result. The rep had a Computer hooked to the service port all the time in all 4. All he could tell me was he would make a report to the engineers at Toyota. He said the bump in RPM's was designed in, but he also said there was nothing he could do about the way they (Tacomas) are set up -- he also thought it was a bit over done. There was actually one of the new ones that did this worse than mine did. Time will tell if they will do anything about it -- I really think if more people would complain -- maybe they would?

 

Ooooooooooo. Shoulda known that.

 

I noticed it right away on off road extra cab i test drove and also in my double cab off road i bought. I have hotten use to it. I feel like its in the way it is down shifting. Almost like when it downshifts its as if there is noback pressure from engine rpm going higher as it dowshits. Like as it down shifts all pressure drops off the engine and you dont hear or feel it catch till right beforr your stopped. Nevertheless ive gotten used to it now but at fist i thiught brakes were not working but they were. Then when it catches close to drop you feel and hear the rpm going high again and gives u impression its accelerating. I think its just way it dowshifts and works with atkinson cycle engine

 

Huh. Can't' decide if this is good news or bad news. It's like "Good news, they all do it. Bad news, it can't be fixed".

But you'e right, we need to light fires under as many butts as we can until they (Toyota, God, anyone) do something about it.

 

In my post which was 2 above this, my last part i meant to say, Then when it catches close to being stopped, you feel and hear the rpm going high again and gives u impression its accelerating. I think its just way it dowshifts and works with atkinson cycle engine.

 

The downshift into first has been speculated.
There are other things going on while it's downshifting; like the flex lock-up clutch on deceleration. Might not be allowing enough slip causing a shudder; when it finally does lets go, RPMs jump. It's the reason I suggested trying it in S3 and neutral.

I think it might be being worked on in the OVTune; if it even is a result of programming logic. Could be the TC clutch, valve body, lock-up clutch, lock-up solenoids/circuits...
Low transmission fluid doesn't help one way or the other.

 

I totally agree -- I was told the exact part that senses the steering input and sends the info to the maim computer and raises the engine RPM's ( I am not a automotive mechanic) . I would really like to see what shutting down this "steering sensor" would do -- problem is I am under warranty and do not want to jeopardize coverage.
As far as what I plan to do-- I will keep this issue present in the mind of this area rep via my dealer service mgr. -- in a courteous but persistent manner.. I really would like to hear from someone above the Toyota area rep -- that someone at Toyota actually cares about my concerns and has paid some attention. I still feel this is a safety concern as it causes idle surges when the vehicle is sitting still and one so much as lightly touches the steering wheel.
In my 70 years of life --I have never experienced a vehicle that does this --new or used