Tranmission Jerk 10mph

2 New Tranmission Put In The 96 Ford Taurus And The Problem Is Still There Taken To Ford Dealer And They Cant Find The Problem After I Put New Napa 3.0 Vulcan Motor Tranmission Does Not Work Put New Motor Mounts On The Car Checked All The Sensors And They Are Still Good Car Has 78000 Mile And I Dont Htink The First Tranny Was Bad Out Of Answers And Money Need Right Answer If You Take Off From Start Transmission Shift Perfect If You Are Going 40 And Floor It Shifts Well Some Times Feels Like It Is In Wrong Gear If You Slow Down To 10 Mph Feel The Tranny Shift Down And Step On The Pedal The Rpm Goes Up And It Jerks The Front Wheels Neeeeeddddd Helpppppppp

When you say it "jerks the front wheels" - what do you mean? Do you mean the engine seems to be out of gear and the engine rpm's increase until finally 1st gear grabs hold and engages resulting in a "jerking" sensation? And this all happened only after replacing the engine?

Well, after 2 transmissions doing the same thing, it's fairly safe to say that it's not the transmission clutch packs, nor any other other control on the transmission. It doesn't seem likely that the same symptoms would just happen to occur in 2 transmissions that you have owned......unless you also have poltergiests. So let's think for a moment of when the problem first cropped up. When you swapped engines right?

I strongly suspect that perhaps some engine/transmission control component was not properly reconnected. Or, one of those components on the new engine is "different" or bad. There are numerous input "feeds" that tell the PCM (Powertrain Control Module - computer that monitors engine and transmission and controls both) what to do. Perhaps you have left one wire disconnected or perhaps broken a component or snapped a connector so the wires don't connect right.

Back to the basics friend. Your tranny worked fine, then you swapped engines, then the tranny didn't work. I have to agree with your gut instinct - the first tranny was never bad. But that's hindsight. Now it's time to move on and find what happened as a result of the engine swap.

Before you conclude that all the sersors are good, get the car hooked onto a really good diagnostic tool.....like Snap-Ons Modis (or is it Modus?). They can capture some error codes that haven't occurred often enough to turn on the check-engine light. You have do some serious diagnosis and come up with a plan before swapping any more parts. Good luck.

well brooster your are right when they installed the engine they crossed the o2 wire sensors by doing this no check engine light came and it was sending a mixed signal to the computer the car has way more power does not skip thank you! if only the four so called transmission specialist that looked at my car would have know. the money i would have saved. again thank you!!!!!!!!