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2012 ACADIA SHUDDER PROBLEM

17K views 5 replies 6 participants last post by  09AWDAcadia 
#1 · (Edited by Moderator)
I HAVE A 202 ACADIA AND THE TRANSMISSION SHUTTERS WHEN DRIVING BETWEEN 40-50 MPH AND WHEN GOING UP HILLS. WHAT COULD BE THE PROBLEM. IT HAS BEEN HAPPENING MORE AND GETTING WORSE. THE VEHICLE JUST RAN OUT OF THE FACTORY WARRANTY AND GM CARES DO NOT CARE ANYMORE ABOUT IT AND I HAVE HAD SO MANY PROBLEMS WITH THIS ONE. ANY ADVICE WOULD HELP AND THANK YOU.
 
#3 ·
Don't know if this OP will be back. Seems someone is just PO'd and feels like yelling at a forum. It also appears that the condition is occurring at the point where the transmission likes to shift between 5th and 6th gears at the slightest grade change. What is described seems normal. (I also wish people would understand the difference between "shutter" and shudder. Thanks NEA!! :mad: )
 
#4 ·
I chased the same problem for months and thousands of dollars. I even changed the timing chain once the CEL came on. I traded in the 2012 after the timing chain didn't even correct the problem.

Dealership blew the engine shortly after my trade, found a faulty crank shaft bearing was to blame for that problem.

They installed a new engine and have told me that the hesitation / shudder has gone away. Talking to the salesman that I purchased my 2017 Acadia from, he tells me that they damaged the torque converter while attempting to align the new engine and had to replace it.

I recall another member here describing the same hesitation / shudder problem and replacing the torque converter to correct it.. that could be a good starting point.

I'm not sure if the torque converter could have caused the bearing to go bad (the whole vehicle shook badly when the hesitation occurred, and I'm sure that was felt through the engine too.

I tried the following to no avail....

-Spark plugs
-Wires
-Throttle body
-Timing chain
-Air filter
-O2 sensor
-Injector Cleaner

Good luck
 
#6 · (Edited by Moderator)
Anyway you might have a diagram of it location just wondering. My acadia has intermittently started this issue and it's triggered only if hard acceleration trying to go from 45mph to 55 mph quickly with traffic but if driven 25% throttle no issues fishing for a possibility at this point. I've lost a major investment a received this headache a car nice car but very problematic. I had an issues with the traction control stabilatrack abs the whole dashboard lit up when received dealerships stated computers whole new transmission transfer case 3 dealerships all the same every mechanic baffled turned out to be an $11 brake switch been fine till now with this issue. I've wondered if it was the accelerator pedal sensor or the vvt solenoid I don't feel like it's the fuel pump due to it'll drive up to 85 mph without any problems if the pedal stays 25%. Any thoughts or similarities in the issue
 
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