Hey guys,

I have a 2007 F-150 5.4L and having a little problem. When I get to about 45-50 my truck shutters however when I turn off the overdrive I do not have the issue. I've searched quite a few forums and all i see are replacing the torque converter or/and tcc solenoid. I have actually done both and she drives better however I still get the shimmy/stutter. Without investing another few hundred dollars on guessing at what it could be, any ideas what else could cause this?

Thanks

 

You might get a better response if you post your question in the proper section - for 2004-2008:

https://www.f150online.com/forums/2004-2008-f-150-80/

 

How many miles on the spark plugs? This sounds like a low grade misfire.

 

Not sure about the mileage on the spark plugs, bought the truck last year.

 

How many miles on the TRUCK?

 

This may sound crazy but I had the same issue with a expedition that I just traded in on my new truck. Ammco wanted to rebuild the trans for $4k. The truck had about 95k miles on it when the shutter started and 280k miles when I traded it in. I have had at least 20 vehicles in my life and have never added nor been an advocate of adding anything to the drive train. However when looking at $4k I figured I had nothing to loss. Of course Ammco told me if I did that they may not be able to rebuild the tranny. What I did was flush the tranny so I had new fluid to start with. I added a product called "lubegard Dr tranny". I got it at OReillys auto. It is about 6 oz in a red tube that you just squeeze into the filled tube. I added a tube about every 40k when the shutter would start again. I am not a mechanic and I am sure people may blast me with their opinions but the results are there. I bought 6 tubes total at $8. That sure beats $4k. Do some research on it and see for yourself. Good luck