Don,
I'll just voice my opinion, for what it is worth.
If the hubs have not been redone that you know of, it might be false
economy to not have them done. As with anything on a 30 year old car,
wear happens!
That said, there are some conditionals to the above viewpoint. If I knew
the history of the car (like owned for many years), or knew that it had
been off the road for some time, or had a rebuild in the recent past,
then rebuild could be overlooked in favor of attention in other areas of
concern (u-joints, or ...).
The one "click" per rotation is a very good clue though. I had loose
bolts at the pinion flange, and there was more than just a click, but
they were very loose, and frequency was not one to one. If this is the
case it would indicate a problem located from the diff to the wheel, and
not on the pinion side of the driveline.
As you have observed, the bearings typically rumble or roar when they are
worn. The wear in the TR hub is somewhat easy to gauge. As stated in most
of the shop manuals, .002" endplay is the starting point, much more than
that and it is probably a good idea to have it worked on. I do not know
if there is a wear limit to that figure, it has not been something that I
needed to know as of yet.
I did reccently have one of my hubs redone (.010" endplay), and when I
received it back, It seemed to have more play in it than before it was
serviced. I checked the sideplay of the assembly with the wheel in place,
and it had about 1/16" sideplay, and I realized that maybe I was being
too critical of the clearance ( I work under a microscope to .0001" of an
inch).
TRF rebuilds them (mine took 8 weeks), and a place here in NC (I am
sorry, but the name escapes me...maybe someone else could help here).
The NC shop runs around $180, a reasonable figure (NFI), and TRF is
around $250/hub, and they put new studs and a u-joint on. There are
others I am sure, but I cannot recall them now.
I hope you can locate the source of the click,
If not whip out a "duece" from the deck, add wire wheels and a
clothespin, drop the top, and roll. Maybe it wont be heard over the
"fun".
Cheers,
Mark Riddle
'72 TR6
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