my '84 300d is making a thump thump thump sound, 16 to 19 mph, under acceleration. doesn't seem to matter what gear.
my lead foot makes it worse.
is this a symptom of carrier bearing failure?

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'85 300DT 170K
'99 R1100RS 63K
'84 300DT 126K ate her own camshaft
'83 300DT 252K executed by non-driver
'68 F-100 138K sold (why?)