Hoping someone here can help me with a transmission problem I am having with a 2013 ford taurus police interceptor. I bought the car wrecked and built it back. About a 2" section of the plastic transmission filler neck was broken off in the accident so I put the cap on and slapped a piece of duct tape over the missing piece. I don't think the missing piece is my problem but just telling about it in case it could be. The transmission fluid is reddish pink and full. It does not leak out of the broken filler neck. Other than the missing piece there is no visible damage to the engine or transmission. The problem I am having is the car jerks in 1st and 2nd gears with normal acceleration. Feels just like a engine miss but almost positive its the transmission. If heavy accelerating there is no jerking in 1st or 2nd. No jerking is present in any other gear anytime. Transmission shifts great and does not slip.The engine runs great It is a AWD transmission. I took the car to the ford dealer and they told me it needed a new transmission and PTU. I then took it to aamco transmission for a second opinion and they told me it needed new spark plugs. They wanted to charge $474. to change the plugs so I did that myself. The plugs I took out looked fine and new plugs did not help the jerking. I hate to buy another transmission and go through the hassle on changing it if I can possibly salvage this one. Any help on a possible cure would be appreciated.