My '05 Lib recently started stuttering/sputtering upon acceleration. This is typically at higher RPMs/higher torque situations - usually when you stomp on the pedal at low speed. The vehicle will vibrate significantly like its having trouble engaging the drive line. Once above 15-20mph, things level out and it operates just fine.

I have the Suncoast torque converter and this is different than the torque converter shudder I experienced pre-Suncoast TC. I recently replaced U-Joints as well. No codes being thrown. Any diagnostic advice here?

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2005 Jeep Liberty CRD Sport
GDE EcoTune w/ Hot Tune on stand by
Old Man EMU 2" Lift, upgraded control arms
SunCoast Torque Converter
HDS Model 001 Thermostat
Weeks Stage 1
Mann Provent 200
Fumoto Oil Valve

Air in fuel?
Need a new fuel filter?
Low boost?

Seems like a fuel system problem to me

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U.S. Army Retired

Is is bellowing any black smoke out the exhaust when it does this? If so, could be a low boost issue.
Does the vehicle still have the EGR system functional? If so, the EGR valve could be leaking by causing you to loose boost. They are notorious for this!
Air in fuel could also be the issue which would not allow the fuel rail pressure to build to the required pressure which would basically starve the engine for fuel when demand required it.

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Supporting Vendor and Moderator of LOST
05 Jeep Liberty CRD Limited
Ironman Springs/Bilstein/Shocks
Yeti StgIV Hot Tune
Week's BatteryTray
No FCV/EGR
Samcos/ProVent
SunCoast/Transgo
Carter Intank-pmp
2mic.Sec.Fuel Filter
Flowmaster/NO CAT
V6Airbox/noVH
GM11 Bld.fan/HDClutch
IronrockArms/wwdieselMount
98 Dodge Cummins 24 Valve