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It is very common for bad shifter bushings to prevent the NSS from moving into the Park position b/c the shifter hits the Gate trim cover in the car , stopping it from moving any further..so, a bad set of bushings changes the LENGTH of the throw of the rod and it will not have enough throw to put the NSS into Park...You will have no problem in N w/bad bushings b/c there is throw on either side of the gate, but that is not the case in Park. Park posistion is the end of the throw on the gate cover.
The common complaint on worn shifter bushing diagnosis is OK start in N , but no start in P.
..but either could be a bad NSS.

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A Dalton