Try replacing the u-joints & see that makes the clunk go
away. It doesn't take much play to make a lot noise.Not sure
about the rear axle, seems like there shouldn't be much play
there either.
John
WC Roddick wrote:
> Our '64 has an 8.75" sure grip differential. I have the
> car on jack stands and the drive shaft removed. When I
> rotate the rear wheels I get almost instant movement of
> the pinion flange, but when I rotate the pinion flange
> there is much more "slack" before the wheels begin to
> turn. It seems to me that the amount of "slack" should be
> the same regardless of which "end" I am rotating. Is
> this behavior normal for the sure grip rear-end, or do we
> have a problem? I am trying to find the source of a
> "clunk" in the driveline, when I shift out of neutral into
> reverse or a forward gear. The "clunk" is kinda loud, and
> has a sort of bell ring sound to it. The front U-joint is
> a bit lose, but side-to-side not rotational, as though the
> ends of the "cross" were worn. I will replace it anyway.
> Also sent the center support bearing insulator to the
> Damper Doctor for rebuild. The rubber was intact, but
> sagging due the car sitting idle for 12 years. Any
> advice? Thanks.Bill & Tami'64 Crown
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