HYPOTHETICALLY (fortunately still)
worst case :
OPDA gear is showing wear AND cam counterpart gear is showing wear. =>
a) codes get thrown (should happen far before b) )
b) oil pump failure ... engine has to be rebuilt.
a) rebuild OPDA with crown gear and fogmod ... replace cam ...
and in case of b) buy rebuilt engine or rebuild or STROKE
pulling the cam is already tempting to stroke in one go!
(I think swapping in rebuilt short blocks are not that expensive in comparison to the hassle of just replacing a cam)
if crown will come up with a new design even better ... I will use that instead of rebuilding my old OPDA for sure.
conclusion: the untouchable reputation of the 4.0 has some cracks now for the 05 and 06 owners ... and it is more than annoying because we were living in the illusion zero problems from the engine in stock form.
but for me I will make the best out of it since I got my lemon already and I am not giving my TJ up
... this unexpected natural born defect of my TJ baby will make my wife mod more compatible with a stroke mod.
most of us have spent far more money in TJ mods than this is issue going to cost worst case ... how many trannies, gears, axles and shafts get sacrificed while having fun with our toys offroad. THE FUN MUST GO ON!
(well ... doctor chrysler still has to expect trouble for his missing/incompetent help during and after the birth
and just for fun: I asked my local Jeep dealer today for the price of a new 05/06 OPDA ... the part was "blocked" in the system, nothing in the country and no stock at Daimler germany ... and the best part: the dealer was totally confused and did not know ANYTHING why the part was "blocked" by the system! so sad )