Thanks for the welcome. I will be sure to look into this, I didn't know these were a failure point on the 4.0 .
Yep, recommended for the V6~4.0L~SOHC Engin + 5r55 Trans +...,
every 75k~100kMiles\10yrs:
* Renew 2 TimingTensioners
* Renew IgnitionPlugs+Wires
* Renew OxSensors
* Renew FuelFilter
* Renew SerpBelt+BeltTensioner
* PlasticFan+FanClutch If Equipped
* Clean MAFSensor & ThrottleBody & IntakeManifold & EGRValve+DPFESensorRiserTubes
every 33kMiles\4yrs:
* New Coolant, New ThermoStat, New Pressure\RadCap; Reverse HeaterHoses
* Inspect+Renew Pump+Belt+PlasticFittings+Hoses+Clamps+Radiator If Needed
* 5r55 Tranny PanDrop & New Filter & New Gasket & New MerconV & BandAdjust
* 1354 4x4TCase If Equipped Drain & New MerconLV
* Diffs Drain & New 75w140.FullSyn+SlipModifier; Inspect+Repair Leaks+Vent If Needed
* Clean+Tighten BattTerminals, Voltage@EnginOff+IdlingCold+IdlingWarm Should Be 12.3v+ & 14.0v+ & 13.5v+
every 5kMiles\6mths
* New Oil+Filter
* Syphon+Refresh DOT4 Fluid @ BrakeReservoir
* Syphon+Refresh MerconV 8oz=1/4qt @ SteeringReservoir
* Syphon+Refresh MerconV 24oz=3/4qt @ Tranny DipTube If Equipped
* Excercise 1354 4x4TCase+Controls If Equipped Thru 2WHi~4WHi~4WLo & Back