Transmission Shudder problems of the 2014 Ford Mustang

The 6 speed manual transmission grinds and/or locks out of gear when shifting from 1st to 2nd gear. The car bucks and surges, worse when going downhill. It makes a knocking noise when there is a torque change.

My 2014 Ford Mustang with 6 speed manual transmission shakes, sometimes violently, when downshifting from 4th to 3rd gear. It also shakes when the gas pedal is let up when in second gear. I have had it in for repair several times, and I have been told that it is a known transmission problem that is not covered by warranty. This is not my first manual transmission vehicle, and I have never had a car shake while driving. Purchased the car in 2015 and the problem has been from day one.

Purchased car new in 2014 and noticed vibration in transmission upon deceleration. I was informed by the dealer that this was a known issue but it was not going to cause and long term issues, after the warranty had expired I started experiencing shifting issues intermitently, I have contacted the dealer on several occasions as this has progessivley gotten worse to check for known issues or if they were going to do anything about it. Now with 85000 miles the car is virtually undriveable and wont shift into second gear and still has the vibration. Ford customer service says there is nothing they can do and still says they do not know of any issues with this transmission even though there has been a class action suit started.