washboard shudder feel when truck deaccelrates to around 1100-900 rpm

I have a 2014 v6 tacoma limited. when coming to a stop from speeds of 40 mph or more as soon as the RPM get to around 1100 rpm I get a sensation in the stg wheel of driving over a wash board. Yea , no it aint the brakes new pads and rotors. Yea it aint the tires brand new good years . Even if you come off the interstate from 60mph to 0 mph without touching the break it still does it. Any credible ideas. Thanks. cuz the dealer has none. they put a new drive shaft and washed their hands after that.

 

is it a wheel issue?

had accord with similar issue. was told 1 wheel was out of round

 

No 4 brand new Goodyear thought it was a tire issue that's y I put 4 new tires

 

These trucks vibrate, a lot. Mine does it too, just as you're describing.

Pretty normal...don't believe me, ask this guy.

 

Mine (a 2013) did that when it was brand new and oddly it went away after a few weeks. I have no idea why, but I wonder if the tires wore in a little or something?

 

did it with the old tires and put 4 new good years and still doing it no worse no better

 

There is a know condition with the torque converter stuttering. There is an additive you can buy that will help with it. One tube for up to 10 quarts so you would need two tubes.
https://www.lubegard.com/products/isf/

 

I would jump under the truck and make sure the U-bolts are torqued to about 75ft lbs. My truck had a rattle while decelerating and it ended up being loose ubolts. Good luck!

 

Willie B did u have this problem first hand and did u use the additive to fix the problem ? did u use two tubes ? what were the results

 

I had the stutter when very lightly on the gas just above idle to maybe 1500rpm. Not all the time but enough to be a concern. It felt just like running over a rumble strip in the pavement. I used two of the bottles when doing the trans flush/fill.

https://www.tacomaworld.com/threads/diy-full-flush-for-automatic-transmission.68462/

 

thanks