I picked up a 2013 F150 XL 3.7 2wd super cab a couple of months ago with 87k miles. I'm now noticing a slight shudder just after the trans shifts into 2nd. It's more pronounced if towing. It almost feels like passing over...well...heavy painted lines? Not as bad as railroad tracks, but it is noticeable. I've had vehicles with torque converter shudder before, this is similar but not that bad- and it only happens for a split second after it shifts to second gear then goes away, then it shifts to 3rd. Other than that it shifts just fine. No shift flare or any other odd behaviors. Any TSB's on these?

Thanks for any info!