I always adjust the cable on these shifters with the car in first gear, and get it perfect there, and then confirm the other gears and N and P are ok. I have found that the PARK in mopar transmissions has alot of slop on the rooster tail compared to the gears. if you adjust your cable so that detent clip sits perfect in there in first gear....does it correct the issue? that being said, the fact it all of a sudden has a problem is weird. I have had the sheathing on the shifter cabled melt/bend/kink to where the trans lever travel doesn't match the shifter handle travel any longer. is the cable in good order? also had them rub through on hard surfaces like the trans case. i now slit some cheap rubber fuel hose and make a home made sleeve for shift cables. held on with a few zip ties.
hope it helps. for the record I love the B&M ratchets, and I hated the gated shifter I had afterwords. went from a quick silver, to a different brand gated shifter (Which literally cost me races) , back to a pro-ratchet with a reverse lockout lever. love it.
