Shudder on Decel

[Sparky83]

Anyone know what could cause a small shudder to be felt on deceleration?? Accelerating and cruise its smooth but if when i happen to let off it starts feeling like it has an out of balance tire.. but dont think thats it..

and its not a brake thing cuz im not pushing on the brakes when its happening.. its just like you let off the throttle completely and then feel it shimmy/shutter while its trying to slow down.

been wondering if its not a mount or u-joints that havent been replaced yet...

 

[SuperCab]

Ujoint is the first thing that comes to my mind but it's hard to say

 

[Sparky83]

mine too.. but same issue.. hard to say for sure.. i know its not a TC issue.. ive had that before in another vehicle... it would buck like a pissed off bronco in a rodeo..

 

[Lorddurock]

i'm think carrier bearing, the rubber mounting part of it to be exact. after that u joints like super cab said. might check the rear axle mounting/ suspension as well

 

[Sparky83]

center shaft bearing was replaced about a year ago.. and actually checked it the other day.. the old one was so bad nothing was actually holding the bearing in place.. i could move it all over the place.. the new ones still as stiff as it was just after they put it in..

 

[dustybumpers]

You sure torque converter not staying locked?
Pull codes lately?

 

[Sparky83]

no codes... TC yes pretty sure.. last time i had a TC stay locked it felt like someone was ramming the back in end and would nearly stall out.. ended up just leaving it unplugged the whole time i had that thing... always hated when itd go into the shop and some "helpful" mech would plug it back in..

 

[dustybumpers]

I have a chevy truck here that has a tc lock valve sticking. It does that, feels like a bad tire, etc. Not troublesome enough to pull the pan.
I put some of this in there when it acts up, and it's good for a while
http://www.google.com/aclk?sa=l&ai=....summitracing.com/parts/lbg-19610?seid=srese1

 

[CowboyBilly9Mile]

?
a) cold engine
b) warm engine

*me let this ferment a smidge before asking.......

 

[Sparky83]

?
a) cold engine
b) warm engine

*me let this ferment a smidge before asking.......

gonna have to go with warm... but only because i notice it at highway speeds.. by time i get to the highway shes warmed up... and its only felt when slowing from say for example 70 - 55 or to stop (if i happen to hit one of them towns where they put a stoplight at the entrance right after the speed reduction)... dont ever seem to feel it on city street speeds..