Porpoise Hork
Well-Known Member
That's correct. Ranger shudder is regardless of shifting. Its definitely the torque converter...has to be. Makes no sense to be anything else if its not actually shifting. All these new GDI engines are designed to provide torque at all speed ranges. No "lag". They use the transmission to do that. My buddy did mention the collaboration between Ford and GM on that tranny but he said that fell apart actually in the late stages. Not sure i'm quoting him correctly or not. I had a 2017 F-150 2.7 ecoboost with the 6spd tranny...no issues at all. My buddy bought the same exact truck only with the 10spd, shudder! The Mercon fluid Ford uses is, i believe, full synthetic, but, not sure a full flush and re-fill would solve anything...plus, at only 4500k on my truck they will think i'm crazy.
I have spent a bit of time reading the plethora of posts on the Mustang forum I linked earlier. It does seem that even as recently as August they are reporting 10R80 transmission fluid levels being between 1/2 and 1 1/2 quarts low. Multiple people are stating that once they topped the transmissions off to the correct level most of if not all of the issues they had been having were gone.
It's not too far outside the realm of possibility that our transmissions were also incorrectly filled at the factory. Looks like this needs to be investigated to confirm it is a more wide spread issue than just with the Mustangs.
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