Shudder when coming to stop

Hoping to get some opinions on what could be causing this shuddering vibration when rolling to a stop. Only happens when I'm just about to stop rolling. Doesn't do it when I hit the brakes. Almost feels like the truck is about to cut off. Shakes and vibrates the front end. 2007 4wd v6 tacoma automatic Thanks

 

Try cleaning the throttle body

 

I will try that.

 

And you're pretty sure it's not a brake pulsation? Out on the highway the brakes feel good and don't shake?

 

Might be the torque converter lock up not letting go

 

Brakes feel fine. I do have 350k miles on this truck. Never had any major issues. Now it seems like these little things will pop up.

 

Try to just tap the brake wayyy before stopping, this unlock the TC if you don't touch the gaz pedal it should not lock again and the transmission shudder will not happen again. If it's still there check your wheel bearing /tie-rod/supension play, a broken engine mount can give some vibration when coasting to a stop but usualy you feel it when you accelerate too like a worn carrier bearing. Clean the throttle body, MAF sensor, check your air filter and spark plug. You are supercharged, get an obd2 scanner and check for fuel trim, Cat temperature and the transmission lock status.

Usualy the fuel system is fast to pop a check engine but you need to rule anything fuel/ignition related, maybe some pending code will show up. Long fuel trim between -20 to 20% don't trig any code so a little vaccum leak can be there undetected. A worn fuel pump/regulator is to be considered at this mileage.

 

I've noticed that too at times (2TR-FE). I don't know about yours, but it's a really short/mild shudder as the truck is juuuust on verge of completely stopping. It's almost like a 'fuel hiccup' or mild 'stumble' of sorts. It's REALLY mild, and doesn't happen all the time. I haven't seen the tach dip at that point, but it's not like I'm wholly watching for it, and it's not like the dash tach is very senstive/quick reacting.

I was planning to clean the throttle body some time in the warmer months as I plan to do plugs anyway. I already replace the MAF (not because of the shudder), and it did not affect the shudder, so it's not MAF related (at least for me. It's possible that it's a @b_r_o and @AwArD said and the TC is releasing properly, which ALMOST stalls the engine, but like I said, I haven't noticed a jitter in the tach when something like that happens.

 

Yeah nothing happens with the gauges. Rpm stay the same.

 

New wheel bearings, New inner and outer tie rods. I hate taking it to the shop, buy my wife hates it even more when i throw parts at it and it doesn't solve the problem.

 

Old thread, but throwing another on the pile. 2023 SR5 CC A/T w/12K miles. Since new in March of last year, my truck has always had a bit of an annoying "something" when approaching a stop. "Vibration" is the closest accurate description. It's not serious, just noticeable. I know it's the tranny because I can shift to "N" and come to a stop and the brakes are SMOOTH. I've read quite a bit about "shudder" and the like too. I'm thinking of draining/filling the tranny to see a couple of things. For one, ensuring the fluid level is correct. Secondly, maybe just doing that will mitigate things a bit. This isn't the normal rant people have about the 6sp AT..... I was VERY familiar with the hunting behavior from past ownership and that part doesn't bother me. In fact, I think that's a major reason I'm far exceeding expected gas mileage in my truck.

 

My 2013 RWD base periodically does that as well - just as it's coming to a stop. Doesn't do it all the time, but it's just noticeable when it happens. As far as I know, it is NOT considered transmission shudder.

 

At what speed are you experiencing this vibration? My truck has a shudder right around 40 mph whether I'm accelerating or slowing. I've also confirmed it's not the brakes by shifting into N around 48 mph and slowing to a stop. It's not 100% of the time, but frequent enough to be annoying. I think I'll be doing the same ATF exchange this summer and possibly adding a tube of Lubegard while I'm at it.

 

Mine is just when coming to a stop. In your speed range, sounds like you have the other classic shudder issue. I've seen Youtubes where folks came to the conclusion that changing the tranny fluid one or more times ended up solving that. Can't explain why.

 

My PERSONAL theory (like I said, it doesn't happen ALL the time for me) is the transmission is not downshifting correctly (for whatever reason). So just as the truck is coming to a stop, the gearing in the trans is in a higher gear, which causes the engine to bog slightly before everything "catches up" with the actual parameters of speed/load/engine speed/trans gear/torque converter slip).

Maybe. It has been happening a LOT less often since I did a trans fluid change with Lubegard, but still occurs on rare occasion. Note that it wasn't a full flush/change - just a simple drain/refill (did not even change the filter).

 

So you just did the 3-4 qt drain and refill with a bottle of Lubegard (Platinum?). That might be in my future plans.

 

Yes. Note that it reduced over time (though fairly quick) - was not an immediate change, but it was consistent before the change and now it's fairly rare, so I am not absolutely sure that it was the "cure/fix." There is a potential that it went away/reduced on its own over time or due to other reasons.