http://www.ford-trucks.com/forums/ar...rter%20Shudder

this sounds EXACTLY like what I have going on with my 2005.

I have posted about my vibration issues before but I think I might have finally figured out how to make it happen consistently.

If I touch the gas when decelerating at around 57-58 MPH... I can make this happen EVERYTIME. I get a WOM...WOM... WOM... until the torque converter locks back up again, and then it get really light and goes away.

Anytime I accelerate through the 57-63ish MPH range (edit: and the torque converter is open) it wom... wom.. woms....

Anybody with feedback on the "Dr. Tranny's Instant Shudder Fix"?

 

I trust Cures in a Can about as much as I trust most politicians, lawyers, and used cars salesmen. It's difficult to give you a course of action because most dealers aren't gonna do what the customer suggests. But, if I was working on your truck, I'd do a power balance test on it while it's shuddering to see if an ignition coil is breaking down under load, and I'd lock and unlock the torque converter with a scan tool while it's shuddering to see whether it really is a converter problem or not.

 

Makes sense...people have tried everything to fix the vibe except Tq. Converters, and since the prev gen had it.....