I have read the recommendation to use a torque wrench to tighten the lug nuts to 100ft/lbs. Is there a problem with overtightening the nuts. I have an old torque wrench and do not trust it 100%. I'd hate to buy a new one just to tighten lug nuts.
95 Green Autobahn Modified Air Box AirHog Filter Grounding Kit Strut Brace New Struts and Shocks SIlverstar Front Turn Indicators
Any torque wrench (old or not) is bound to be better than this method I've used for years:
If it's not exact I don't think it will be a huge problem. Get it close and all the lugs near equal as TJM said. I read a good method is tightening all equally to 70 ft-lbs, then up to 100 ft-lbs. After driving a trip or two, check them all again and retighten to 100 ft-lbs. if needed.
I think an old torque wrench would be ok on wheels. Probably not on other fasteners though. Overtightening is a problem, but not like 10-20 lb-ft over. Usually when it's a problem is when shops use an airgun and torque it to 200-300+ lb-ft. That is definitely a problem.