You heard wrong, its better to have the valves a little on the loose side as they tighten over time. I would suggest readjusting them.

I would suggest replacing the bushings as to bypassing things. Your car will become progressively harder to find the right gear in as the bushings wear. Also, I could be wrong, but I think that the automatic NSS also houses the reverse light switch.

Which brings us to the other reason to replace the bushings, to make sure that the reverse light switch continues to be activated in the correct position.

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2004 F150 4.6L -My Daily
2007 Volvo XC70 -Wife's Daily
1998 Ford F150 -Rear ended
1989 J-spec 420SEL -passed onto its new keeper
1982 BMW 733i -fixed and traded for the 420SEL
2003 Volvo V70 5 Speed -scrapped
1997 E290 Turbo Diesel Wagon -traded for above
1992 BMW 525i -traded in
1990 Silver 300TE -hated the M103
1985 Grey 380SE Diesel Conversion, 2.47 rear end, ABS -Sold, really should have kept this one
1979 Silver 300D "The Silver Slug" -Sold