Shudder on acceleration
Give us the usual information, then we might be able to give you some ideas.
Lucas oil makes a product called “SHUDDER GARD” tried and true!
What engine does the truck have? 3.5L N/A, 5.0L V8 , 3.5L Ecoboost, or 6.2L V8 ?
If you have the Ecoboost there’s a possibility that you’re getting condensation inside of the intercooler. If that’s the case, it would only become noticeable on moderate to hard acceleration, it’s more common on the early models (11-12). Also if you have an Ecoboost, you’re going to want to change the plugs more often than the manual suggests. 75k miles is about the max on set of spark plugs for the Ecoboost.
The OP never posted back with any info. A shudder could be an engine going out, vacuum leak, ignition miss, fuel injector problem, fuel pressure issue, motor or trans mount issue, torque converter, U-joints, wheel balance, brake problem, you name it. The original post was “I’m sick, what’s wrong?”.