====== firstname.lastname@example.org (Trailblazer)
(snipped, cut, diced, rearanged,titles added)
78 chevy 1/2 ton 4x4 with the 350/350
'galloping' really bad at 30-33 mph.
It feels exactly like a tire being out of round,
If I brake through that speed, it does it,
if I accelerate and/or coast through that speed, it does it.
i've swapped tires with my son's truck just to see and it still does
i swapped front and rear axles, and it still does it.
thanks in advance for the help
Take the rear driveshaft out and check the u-joints for signs of
for looseness in the pinion gear using the
yoke on the differential, see if the yoke will
flop around any.
Raise the vehical and check for roughness
in the wheel bearings.....FRONT AND REAR!
(sometimes you need to pull the tires to get
a good enough feel on "slightly" rough bearings)
Come up with some more symptoms and
we'll be glad to give you some more guess's.
~has never heard the term "gallop" used to
describe a symptom~