Yes you should, unless the guy was using a torq-stick on the impact.

Denny

If the specified torque was reached (or exceeded) using the impact driver,
using a torque wrench afterward would serve only to verify that the lugs are
torqued to *at least* the specified torque.  However, the specified torque
likely has a *range* of values (ie 65-70 ft/lb).  If the torque wrench
didn't turn the lugs, they're overtightened.  It sounds like this is what
happened to you.  Aside from making it difficult (or impossible) to change a
flat alongside the road, there's the potential to do damage to the wheels,
nuts, lugs, and/or rotors.

FWIW, even when I've specified it as you have, I've never found a tire shop
that properly torques lug nuts/bolts.  The last time I had a tire shop
install tires/wheels ('69 Barracuda) , I specified they not use an impact
driver at all and that they must torque to the 55 ft/lb specification using
only a manually-operated torque wrench.  They torqued the 7/16" lugs to over
150 ft/lb (the limit of my torque wrench)!  If I can avoid it, I no longer
let tire shops install tires/wheels.

Bryan

It's a good idea to spot check two lugs on each wheel. See if you can
get em off with a hand wrench. Cause that's what you'll likely have
with you when you get a flat tire. Unless you're like me and always
carry a breaker bar and deep impact socket.

I hate touch pads! I asked the owner of the tire shop to be sure and
have
the lug nut torqued. He said no problem. They do it by hand. Well I
have
been thinking about this since yesterday when they did it. The guy
working
on the truck cinches all the lugs with an air impact wrench ( I had
the
tires rotated too) then goes around and checks the torque with a
torque
wrench. He didn't just snug it with the impact he tightened it all
down.
Like I said. I'm no mechanic or tire guy. But this makes no sense to
me. I
think I should go home and loosen everything and re-torque according
to the
manual.

What do you guys think?

Ed Dowdy
Fithian IL