I have noticed then when I am accelerating and hit 50-mph I feel a jerk/shrudder coming from the transmission. I took it to the dealership and they could not figure what the problem was or should I say re-create it. I went back and took the Tech for a test drive. It only does it when the engine is warmed up. It did the jerk thing around 50-mph. He thought that the transmission was doing a firm shift. Then he said it was shifting into 4th and the TC was locking up at the same time. He concluded that itis better to have a firm shift then to haveto slipping. He even went on tosay that some peopleadd shift kits to their truck because they want firmer shifts. So nothing further was done. One long trips it gets annoying.

Now....it only does the jerk thing at 50-mph or when acceleratingbeyond 50-mph.There is nothing else noticeable belowor above that speed.

I have an 06' CTD with Auto tranny. If anyone has experienced this or may know what the cause is please advise. Since I was not really happy with thereason I was given, I am going to go to a different dealership.

 

there is a TSB for your truck for transmission shifting...i would about bet thats your problem......mine did the same shudder deal but only at slow speeds they did the TSB but it didnt help it turned out my valve body was bad

 

Do you have that TSB#?

 

that was tsb 18-003-06.......hopefully that will fix your problem

 

the Jerk around 50!!

[IMG]local://upfiles/57173/6B2D15BEC12E4C4D886870EB8B3825F2.jpg[/IMG]

 

^Mayfair's got some competition now ^

 

I thought it was the reach around 50