The little Edge that couldn't

[Jeremy airjer W]

I was lucky enough to diagnose this one. 2007 Ford Edge, 3.5 liter, auto trans. Customer complained that it would not "go" and that the check engine, ABS, and Trac lights where on. I found codes for the transmission input speed sensor and did a little research. There is a TSB that in a nutshell tells you to verify the circuits integrity and if nothing is found replace the sensor. Using another resource I found many speed sensors where being replaced to resolve this issue. A visual and ohm check of the wiring and I was satisfied that the most likely culprit was the speed sensor.

 

The old input speed sensor on the right and the old output speed sensor on the left.

After removing the air filter housing, radiator hoses, and one of the trans cooler lines I was finally able to see and remove the front cover. This is what greeted me. The connector on the very right is the output speed sensor and if you follow the wiring loom you can see it disappears on the left.

Next the ladder frame is removed exposing the valve body. If you look at the very bottom of the picture you can see the harness for the output speed sensor. It is also plugged into the ladder frame assembly. The funny thing is it is bolted to the transmission externally but the harness runs through the transmission internally. In order to replace it you need to remove all the same things we are removing to replace the input speed sensor, we opted to replace them both at the same time.

The valve body is on the bench resting comfortably next to the ladder frame Notice the four different sized bolts that hold the ladder frame to the valve body. I made special notes on where each on went but was surprised to find the same info in the repair information, Thank you Ford!

We can finally see the input speed sensor. It was easily removed after removing the single bolt that held it to the transmission.  in the bottom right you can again see the output speed sensor harness. That was a real treat to fish through the transmission!

After installing the new parts and reassembling all the components the codes where cleared and a quick test drive verified a successful repair.

Who's ready to give it a whirl?

[leech~~]

I'll give it a test drive!   But I ante cracken no tranny!

[bobberineyes]

Good job Jeremy,  think my next ride will be a huffy..

Edited November 4, 2015 by bobberineyes

[Ufatz]

OMG I am SO glad all my cars are old simple beasts.

[leechlake]

you chew mint skoal too?  Bad boy!

 

[Jeremy airjer W]

Lol, I noticed that last night, should have edited that one......

[delcecchi]

Well you can't smoke indoors, and smoking around gasoline is probably a bad idea anyway....