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Shudder/Shaking at 35-40mph and 70-75mph

35K views 41 replies 21 participants last post by  edubfromktown  
#1 ·
My mechanic is scratching his head about what is making my 2012 CT v6 4WD shudder/shake at 35-40mph and again at 70-75mph. When on the lift he cannot find any visible signs of something being wrong. But go down a side road at just about 40MPH and you can feel something is not right. As the driver you feel it in the wheel and pedals and seat. As a passenger, you sorta feel it. I think our bodies are just used to feeling stuff like these so the brain compensates. Driving with something which is prone to rattling sitting on the passenger seat (like and empty pet carrier), now doubt something is wrong.


My mechanic wants to wait and see if it gets worse so hopefully he can say ah-ha! when looking at the belly of the beast. He doesn't have to live with it every day. He also doesn't want me paying hundred to thousands of ours on a fishing expedition.



Anyone encounter anything similar.


My CT has 135,000 miles and is up to date on all of its servicings.


It does not change with engine speed.

It sorta feels like it is lugging, but forcing a kick down does not make it go away. Only speeding up or slowing down to get out of its trigger zone makes it go away.
It seems more pronounced when everything is good and warmed up.
 
Discussion starter · #4 ·
Hi. Yes, tires and wheels were balanced and rotated. First thing my mechanic tried. Wheels are stock, tires are Michelin Premier A/S and they have about 30k on them.



I remember the sensation of going in and out of Eco. What I assume you guys are talking about when you say the VCM shudder. That happened at all speeds and I don't even notice it anymore.


This shudder is so weird. As a lifetime Manual Transmission guy, I would liken it the most to the lugging shudder one gets in a MT car and you gear is too high. The shudder is worse feeling at the speeds going up a slight incline than coasting down a slight hill at these speeds.


My mechanic has leaned toward and axle but cannot see/feel enough wear to say YES!


I almost wonder about getting the transmission drained and filled again. Like I said earlier, it is much more pronounced when the car is hot from use. I wonder if there is too much fluid making the problem appear when things are hot? It is so hard to get a real read on the dipstick with these super thin fluids. My old diesel Benz, super clear as the oils tend to be DARK and thick. These slipper modern fluids are viscous and transparent.


I love me CT and it is nearly paid off...but I have no interest in a multithousanddollar spending spree to solve this. :)
 
Discussion starter · #8 ·
Thanks! Glad to hear someone else encounter it. At 40% on my Oil. Next change is the next time he was planning to take a stab at it again to pin point. Being a chubby Accord, that extra weight on Accord designed parts does follow your experience.
 
Discussion starter · #10 ·
Just replaced both front axles. Mischief Managed! Shudder/Shake is gone. CT once again goes down the road fast and smooth!


Ended up getting mine from www.hondapartsnow.com which saved me $300 over the local dealer. They wanted $1500 for the whole job! I ended up with a total bill under $900 with the added cost of labor from a friendly neighborhood mechanic.