Don,
My bent front drive shaft was a source of unknown vibration for a while. =
Tire balancing didn't do it. It was found by a suspension shop who was
doing an "on coach" tire balance (works well, too). They noticed the dri=
ve
shaft bounce while doing the balance. =
Anyway, Wes at Cinnabar Engineering told me that the front shocks are the=
only suspension travel limiter. He says some manufacturers shocks will n=
ot
limit the travel and then the drive shaft does - and bends. I would gues=
s
any good bounce will do it. I think mine was bent when I bought my coac=
h,
although I can think of many RR tracks, dips, etc. where we bounced prett=
y
good. He worked w/ Bilstein years ago to develop the shock specifically
for the GMC. =
The straightness (?) of a new shaft is 0.030 inches total indicator readi=
ng
if I remember correctly. My shaft was over .060". the new shaft was eas=
y
to install, but not a nice way to spend a June Saturday in Phoenix.
Good luck - I bought Bilstiens.
Steve =
My bent front drive shaft was a source of unknown vibration for a while. =
Tire balancing didn't do it. It was found by a suspension shop who was
doing an "on coach" tire balance (works well, too). They noticed the dri=
ve
shaft bounce while doing the balance. =
Anyway, Wes at Cinnabar Engineering told me that the front shocks are the=
only suspension travel limiter. He says some manufacturers shocks will n=
ot
limit the travel and then the drive shaft does - and bends. I would gues=
s
any good bounce will do it. I think mine was bent when I bought my coac=
h,
although I can think of many RR tracks, dips, etc. where we bounced prett=
y
good. He worked w/ Bilstein years ago to develop the shock specifically
for the GMC. =
The straightness (?) of a new shaft is 0.030 inches total indicator readi=
ng
if I remember correctly. My shaft was over .060". the new shaft was eas=
y
to install, but not a nice way to spend a June Saturday in Phoenix.
Good luck - I bought Bilstiens.
Steve =
