DFM Vibration after lifter replacement

[08BlackSierra]

Has anyone else notice an increase in DFM vibration after lifter replacement. I never noticed when my truck shut cylinders down until shortly after having the driver side lifters replaced. 

 

21 5.3L 8 Speed 12k miles 

[Kilgore Trout]

I have never detected any vibration, shudder, shift point change or shifting smoothness change on either my 2007 Yukon (5.3L FF, AFM) or my 2022 Sierra AT4 (6.2L, DFM).

 

I have read enough reports of such things by very credible posters, to know it is real.  I have never heard an explanation of why some trucks exhibit it or even what the source of those symptoms might be.

[08BlackSierra]

I'm just baffled that I have it now after having the drivers bank lifters replaced. It's annoying. 

[voided3]

We also have a '21 Silverado DFM 5.3 8-speed truck that had lifter replacement. It vibrated the same before and after the replacement, especially cruising at specifically 31 MPH prior to shifting up a gear. I can't stand DFM so I drive the truck in L7 to disable it and it's much smoother at all speeds.